Frequently Asked Questions

DME Maintenance provides chimney cleaning (gas, oil, wood, fireplace, stove, pellet), chimney repair (pointing, crown, flashing, cap, chase cover, waterproofing), stainless steel chimney liner installation, prefab chimney service, and chimney blockage removal throughout Nassau County, Long Island.

DME Maintenance charges $165 for a standard gas or oil flue cleaning in Nassau County. Wood-burning fireplace chimney cleaning starts at $249. All cleanings include a full safety inspection and written report. Call 516-690-7471 for an exact quote.

Yes. DME Maintenance holds Nassau County Consumer Affairs License #H0101570000, in perfect standing since our founding in 2001. You can verify this record directly on the Nassau County consumer affairs portal.

Yes. Every home that heats with gas or oil has a chimney flue that vents combustion gases. Both gas and oil flues require annual inspection and periodic cleaning. Gas flues are at risk for acidic condensate damage; oil flues accumulate heavy soot. Skipping service creates carbon monoxide and fire risk.

DME Maintenance installs stainless steel chimney liners starting at $1,400 in Nassau County. Final pricing depends on flue height, required diameter, and insulation requirements. Call 516-690-7471 for a free liner assessment.

Yes. Oil-to-gas conversions require a new stainless steel chimney liner under Nassau County code and appliance manufacturer requirements. DME Maintenance handles liner installation for oil-to-gas conversions county-wide.

Chimney pointing (also called tuckpointing or repointing) is the process of removing deteriorated mortar from between chimney bricks and replacing it with fresh mortar. DME Maintenance charges from $600 for typical section pointing in Nassau County. All quotes are free and on-site.

Common signs your chimney needs repair: white staining (efflorescence) on exterior brick, mortar that is crumbling or missing, water stains near the firebox, rust on the damper, a cracked or missing chimney crown, water in your mechanical room after rain, or visible brick damage from the roofline.

DME Maintenance typically schedules Nassau County chimney cleanings and inspections within the same week. Emergency service for blocked flues or safety concerns is prioritized. Call 516-690-7471 or text us for fast scheduling.

No. DME Maintenance is owner-operated since 2001. No call centers, no subcontractors. The owner is directly involved in all work. This is how we maintain our perfect record with Nassau County Consumer Affairs.

Yes. DME Maintenance provides Level 2 chimney inspections for Nassau County home buyers and sellers, with written reports and photo documentation suitable for mortgage lender and real estate attorney review. Call 516-690-7471 for same-week scheduling.

Yes. DME Maintenance responds to Nassau County chimney emergencies on a priority basis — blocked flues, carbon monoxide concerns, no-heat situations, storm damage, and puffbacks. Call 516-690-7471 directly for fastest response. Do not restart your heating appliance if you suspect a chimney blockage or CO issue.

Yes. DME Maintenance cleans dryer vents throughout Nassau County starting at $149. Dryer vent cleaning can be combined with chimney service in a single visit — mention it when booking. Clogged dryer vents are the #1 cause of home appliance fires in the US.

Yes — blocked, cracked, or improperly lined chimneys are one of the most common causes of CO buildup in Nassau County homes. Annual chimney cleaning and inspection is the primary prevention. If your CO alarm sounds, evacuate immediately, call 911, then call DME Maintenance at 516-690-7471.

DME Maintenance charges $165 for a standard gas or oil flue cleaning in Nassau County. Wood-burning fireplace cleaning starts at $249. Price includes a full safety inspection and written report. Call 516-690-7471 for an exact quote.

The NFPA recommends annual chimney inspection and cleaning for all fuel types. Gas flues should be cleaned every 1–2 years. Oil flues annually. Wood-burning fireplaces after every 50–100 fires or at least once per heating season.

Yes. Gas chimney cleaning matters because gas combustion produces acidic condensate that deteriorates clay tile liners over time. Annual cleaning and inspection of your gas flue is essential for carbon monoxide safety and to catch liner degradation before it becomes a code issue.

Yes. DME Maintenance holds Nassau County Consumer Affairs License #H0101570000, in perfect standing since 2001. You can verify this directly at the Nassau County consumer affairs portal.

A chimney cleaning includes: brushing and vacuuming the flue, inspection of the liner, crown, cap, damper, and firebox, and a written safety report. For wood fireplaces, creosote is removed to NFPA Level 1 standards. Need a liner upgrade? We assess that during every cleaning.

Yes. Gas furnaces produce acidic condensate that corrodes clay tile flue liners over time. Annual gas chimney cleaning is the single best way to prevent carbon monoxide from entering your home.

DME Maintenance recommends annual inspection for all gas flues. Cleaning frequency depends on your system — high-efficiency condensing appliances may require more frequent service because they produce more acidic exhaust.

Yes. A cracked, blocked, or deteriorated gas flue liner can allow carbon monoxide to migrate into living spaces. A stainless steel liner upgrade or blockage removal resolves most at-risk conditions. This is documented as a cause of CO poisonings in Long Island homes every year.

Gas appliance flues should be cleaned and inspected annually. Gas combustion produces less soot than oil or wood, but acidic condensate still builds up in the liner and corrosion occurs in connectors and caps. Annual service catches deterioration before it creates a CO risk.

Yes. A blocked, corroded, or undersized gas flue can cause CO to backdraft into the house. Modern gas appliances have safety shutoffs, but they don't catch all venting problems. Annual inspection is the most reliable protection. If your CO detector alarms, stop the appliance and call 516-690-7471.

Annually, without exception. Oil chimney cleaning is critical — skipping even one year can allow soot to restrict draft enough to cause puffbacks, equipment failure, and carbon monoxide risk.

A puffback happens when unburned oil vapors ignite explosively in the furnace or boiler. Annual chimney cleaning and burner service prevents puffbacks.

Yes. Oil-to-gas conversions require a stainless steel chimney liner under Nassau County code and most appliance manufacturer requirements. Call DME Maintenance at 516-690-7471 for a free liner assessment.

Oil flues should be cleaned annually — every heating season. Oil combustion produces more soot and sulfurous deposits than gas. Annual cleaning removes buildup before it restricts draft, damages the liner, or creates a fire hazard.

Soot and oil residue accumulate in the flue, restricting draft and causing the burner to run less efficiently. In severe cases, buildup causes the safety shutoff to trigger. Annual cleaning also identifies liner deterioration early — oil flues corrode faster than gas flues due to the sulfur content of heating oil.

The NFPA recommends annual wood fireplace chimney cleaning, or after every 50–100 fires — whichever comes first. Nassau County's heating season typically means annual service before fall.

Creosote is a tar-like residue produced by incomplete wood combustion. It builds up inside chimney flues and is highly flammable. A thick layer can ignite into a chimney fire burning above 2,000°F — cracking flue liners and potentially igniting your home's structure.

DME Maintenance recommends inspection before first use each season. If the chimney was not cleaned last spring and has not been inspected, call for an inspection first. A blocked or creosote-laden chimney can cause CO to back up. Chimney cap condition should also be verified before lighting the first fire.

The NFPA recommends annual inspection and cleaning for wood-burning fireplaces. If you burn regularly — more than a cord per season — semi-annual cleaning may be warranted. Creosote accumulation depends on burning habits and wood quality more than calendar time.

Burn seasoned hardwood — wood split and dried for at least one year, ideally two. Moisture content should be below 20%. Oak, hickory, ash, and maple are excellent choices for Long Island. Avoid softwoods like pine for primary heating use, green wood, and any treated or painted wood.

Yes. Gas fireplaces should be cleaned and inspected annually. Burner ports clog, pilot assemblies drift, and venting connections can loosen — all of which affect safety and performance.

DME Maintenance's gas fireplace service includes: burner cleaning, pilot service, venting inspection, glass cleaning, firebox cleaning, and a carbon monoxide safety check. Call 516-690-7471 to schedule.

Yes. Gas fireplace burners, pilots, thermocouples, and venting systems need annual cleaning and inspection. Burner ports clog with dust and debris, pilots drift out of adjustment, and venting can develop obstructions. Annual service keeps the unit safe and operating properly.

Intermittent ignition is usually a dirty thermocouple, a clogged pilot orifice, or a failing igniter. These are standard service items that DME Maintenance addresses during a gas fireplace cleaning visit. Call 516-690-7471 for same-week service throughout Nassau County.

Yes. Ceramic or refractory gas logs accumulate dust and soot over time and should be removed and cleaned during annual service. Damaged logs should be replaced — cracked logs can disrupt the flame pattern and affect burner performance.

Annually at minimum. If your wood stove is a primary heat source running most of the winter, mid-season cleaning is also recommended. Connector pipes on wood stoves accumulate creosote faster than open fireplace flues.

DME Maintenance's wood stove service covers: stove interior and baffle, connector pipe, full flue liner, cap and spark arrestor, and gasket/seal inspection. Call 516-690-7471 to schedule.

A complete wood stove cleaning includes sweeping the flue connector pipe, cleaning the stove interior, removing ash and creosote from the firebox and baffle, inspecting the door gasket and glass, and checking the stovepipe connections for gaps or corrosion. DME Maintenance provides a written report after every visit.

The rope gasket around the stove door compresses over time and loses its seal. Test it by closing the door on a dollar bill — if the bill pulls out easily, the gasket is worn. A failed gasket allows excess air into the firebox, reducing efficiency and increasing creosote formation.

Stovepipe connector sections (the pipe between the stove and the wall thimble or ceiling support box) should be inspected annually and replaced when rust-through, perforation, or failed joints are found. Single-wall connector pipe typically lasts 5-10 years depending on use intensity.

Annually, plus homeowner ash pan cleaning weekly during the burn season. The annual professional service covers the full combustion chamber, heat exchanger, exhaust vent, and mechanical components that homeowners cannot safely access.

Most pellet stove shutdowns are caused by a clogged exhaust vent or dirty combustion sensor. Professional cleaning resolves the majority of shutdown issues without parts replacement.

The most common cause is a clogged exhaust path — ash buildup in the combustion chamber, burn pot, or exhaust vent restricts airflow and triggers the safety shutdown. Annual cleaning prevents this. If the shutdown started recently, check the burn pot for clinker buildup and the exhaust cap for obstruction.

Pellet stoves require more frequent cleaning than wood stoves because they run continuously for extended periods. The burn pot and ash drawer should be cleaned every 1-3 bags of pellets. A full professional cleaning — including the exhaust vent, heat exchanger, and combustion chamber — should be done annually or after every 2 tons of pellets burned.

Yes. DME Maintenance cleans the entire exhaust path — the stove interior, the connector pipe, and the exterior vent termination. Ash and fine particulates accumulate in the vent and significantly restrict airflow if not cleared annually.

The most common causes are bird nests, squirrel and raccoon nests, fallen mortar or brick pieces, and damaged or missing chimney caps that allow debris to accumulate.

Extremely. A fully blocked flue prevents combustion gases — including carbon monoxide — from venting. Do not use your heating system if you suspect a blockage. Call DME Maintenance at 516-690-7471 for same-week service.

A properly fitted stainless steel chimney cap with mesh sides is the most effective prevention. DME Maintenance installs caps starting at $255. Pair with an annual chimney cleaning to catch early buildup.

Signs of a blocked flue include smoke entering the house when the fireplace is in use, the furnace or boiler safety shutoff triggering repeatedly, or a CO alarm activating. A blocked oil or gas flue is a serious safety situation — do not restart the appliance until the blockage is cleared. Call DME Maintenance at 516-690-7471.

A properly sized stainless steel chimney cap with screening prevents birds and animals from nesting in the flue. DME Maintenance installs caps on every blockage call — clearing the obstruction without capping is only solving half the problem.

Chimney pointing runs $600–$900 for typical sections. Crown repair starts at $395. Flashing repair varies by scope. DME Maintenance provides free on-site estimates — call 516-690-7471.

Common signs: white staining (efflorescence) on exterior brick, crumbling mortar, water stains near the firebox, rust on the damper, a cracked or missing chimney crown, or water in your mechanical room after rain.

Water damage is progressive. What starts as cracked mortar becomes loose brick, then structural damage and water in your walls. A $600 pointing job ignored for two seasons can become a $4,000 structural repair.

Most Nassau County chimneys can be repaired rather than rebuilt. Full rebuilds are warranted only when the masonry structure has failed at the foundation or when more than 50% of the brick is spalling. DME Maintenance will give you an honest assessment — we recommend the most cost-effective solution, not the most expensive.

Some insurance policies require proof of regular chimney maintenance. A written inspection report from DME Maintenance documents the chimney condition and can satisfy insurer requirements. Chimney fires resulting from neglected maintenance may affect claim outcomes.

Most chimney repairs in Nassau County are scheduled within one to two weeks. Emergency situations — CO concerns, complete blockages, active leaks — are prioritized for same-week or same-day response. Call 516-690-7471.

DME Maintenance installs standard stainless steel chimney caps starting at $255 in Nassau County. Multi-flue caps and custom sizes are priced separately — call 516-690-7471.

Yes. An uncapped chimney allows rain, snow, birds, and animals directly into your flue. Water in a chimney liner accelerates deterioration dramatically. A cap is the most cost-effective chimney protection available.

A stainless steel chimney cap properly installed lasts 20+ years in Nassau County's coastal environment. DME Maintenance only installs stainless — never galvanized, which rusts in 5–10 years near the coast. Pair with chimney waterproofing for full protection.

Cap sizing depends on your flue tile outside dimensions and whether you have a single or multi-flue chimney. An incorrectly sized cap — too small or too large — creates gaps that defeat the purpose. DME Maintenance measures on-site and selects the correct cap for your specific chimney.

A quality stainless steel chimney cap properly installed should last 20+ years in Nassau County — including South Shore homes with aggressive salt air exposure. Galvanized caps typically rust through in 3-7 years on the South Shore. Stainless costs more upfront but is the only practical choice for coastal homes.

The chimney crown is the concrete slab at the top of your chimney that seals the brick from rain. A properly built crown with an overhang directs water away from the masonry. Pair crown repair with a chimney cap and waterproofing for complete top protection.

DME Maintenance charges from $395 for chimney crown repair in Nassau County. Severely deteriorated crowns require demolition and rebuild, quoted on-site after inspection.

Homeowners sometimes apply crown sealant products, but improper application on a structurally cracked crown fails within one freeze-thaw cycle. DME Maintenance uses commercial-grade materials with proper surface prep. After repair, ChimSaver waterproofing extends the life of the repair significantly.

The crown is the concrete or mortar slab that covers the top of the chimney masonry, with the flue tile(s) extending through it. The cap sits on top of the flue tile(s) to keep rain and animals out of the flue. Both can fail independently. Failed crowns let water into the masonry; failed caps let water and animals into the flue.

Minor cracking — hairline cracks and surface deterioration — can be repaired with elastomeric sealant and extended with ChimSaver waterproofing. Crowns that have cracked through, separated from the flue, or crumbled at the edges need to be rebuilt. DME Maintenance assesses the specific condition on-site.

A chase cover is a flat metal cover that fits over the top of a prefab chimney chase — the box-like structure that surrounds the metal flue pipe on factory-built fireplaces. It prevents rain from entering the chase.

Signs of a failed chase cover include: rust stains running down the chase exterior, water stains on the ceiling or walls near the fireplace, and a rusted or collapsed metal cover visible from the roofline.

Rust staining on siding below the chimney top almost always means the chase cover is failing. Galvanized chase covers rust through over time — the rust water runs down the chase and stains the siding. Replacement with a stainless steel cover stops the rust and prevents water from entering the chase.

Galvanized steel chase covers typically last 7-15 years in Nassau County — shorter on South Shore properties near the water. Stainless steel covers last 25+ years in most conditions. If you're replacing a galvanized cover, upgrading to stainless is worth the marginal cost difference.

Minor seam separations can be sealed with roofing sealant as a temporary measure, but rusted or perforated covers need full replacement. Attempting to patch a severely deteriorated galvanized cover rarely lasts more than a season. Replacement with a properly fitted stainless steel cover is the permanent solution.

DME Maintenance charges from $600 for chimney pointing in Nassau County. Full chimney pointing for heavily deteriorated chimneys typically runs $600–$900 and up. All quotes are free and on-site — call 516-690-7471.

Tuckpointing and pointing (repointing) are the same thing — removing deteriorated mortar and replacing it with fresh mortar. After pointing, DME Maintenance recommends ChimSaver waterproofing to protect the fresh mortar immediately.

Properly done chimney pointing lasts 25–30 years under typical Nassau County conditions. Following pointing with ChimSaver waterproofing treatment extends the life of the repair by protecting fresh mortar from moisture exposure.

Freeze-thaw cycles are the primary cause on Long Island — water infiltrates the joints, freezes, expands, and mechanically breaks down the mortar over years. South Shore homes near the water experience accelerated deterioration from salt air. Most Nassau County chimneys show significant mortar joint failure after 20-30 years without maintenance.

Minor joint deterioration can wait a season if no water is actively entering. Once joints fail completely and brick faces begin to spall or water is entering the chimney structure, repairs become more extensive and expensive. Early repointing is always cheaper than the alternatives.

ChimSaver is a professional penetrating chimney waterproofing treatment. Unlike paint or silicone sealants, ChimSaver is vapor-permeable — blocks water from outside while allowing moisture vapor from inside to escape. Best applied after chimney pointing or crown repair.

ChimSaver should be applied after any chimney repair — pointing, crown work, or cap installation — on clean, dry masonry. In Nassau County, fall or spring are ideal application windows.

Waterproofing alone does not fix a chimney leaking through structural failures — those must be repaired first with pointing, crown repair, or flashing work. ChimSaver then protects the repaired masonry from future water penetration.

Regular silicone-based masonry sealers form a film on the surface that traps moisture vapor inside the masonry. As vapor pressure builds, it causes spalling and accelerated deterioration. ChimSaver is a penetrating sealer that allows moisture vapor to escape while blocking liquid water — specifically designed for chimneys that experience heat-driven vapor pressure.

ChimSaver waterproofing typically remains effective for 10+ years under normal Nassau County conditions. South Shore homes in high salt-air environments may benefit from reapplication every 7-8 years. The product is applied in two saturating coats by DME Maintenance for maximum penetration and longevity.

Factory-built prefab fireplaces typically last 20–30 years with proper maintenance. Key failure points are the chase cover (5–10 years for galvanized), firebox panels (15–25 years), and the metal flue system (20–30 years).

It depends on which components have failed. Chase covers and individual firebox panels are replaceable. If the firebox itself or the metal flue is structurally compromised, replacement is usually more cost-effective than repair. DME Maintenance gives honest guidance.

Prefab (factory-built) chimneys should be inspected annually, just like masonry chimneys. The metal components — outer housing, inner liner, seals — are subject to corrosion and mechanical wear. Many Long Island prefab systems installed in the 1980s-1990s are now approaching end of design life.

Masonry chimneys are brick or block construction that runs through the house structure. Prefab chimneys are typically surrounded by a wood or metal chase visible above the roofline — often sided to match the house exterior. If you're unsure, DME Maintenance can identify the system type during a standard inspection.

Yes — most prefab chimney components including liner sections, caps, chase covers, and seals can be replaced without replacing the entire system. Parts availability varies by manufacturer and model age. DME Maintenance sources manufacturer-specified replacement parts for prefab systems throughout Nassau County.

DME Maintenance installs stainless steel chimney liners starting at $1,400 in Nassau County. Final cost depends on flue height, required liner diameter, and whether insulation wrap is required. Call 516-690-7471 for a free assessment.

Yes. Oil-to-gas conversions require a stainless steel chimney liner under Nassau County code. The original oil flue is typically oversized for gas venting and contains oil residue that deteriorates with gas combustion. A properly sized stainless liner is required before the new appliance can be put into service.

Signs include: home over 25 years old with no liner inspection, replacing your furnace or boiler, carbon monoxide detector alerts, white staining (efflorescence) on chimney brick, or a video inspection revealing cracks. Schedule an annual chimney cleaning and we assess liner condition during every visit.

DME Maintenance is factory-authorized for stainless steel chimney liner installation. We install flexible, rectangular, oval, and insulated liner systems — all with a lifetime warranty.

Yes, in most circumstances. Nassau County municipalities require a properly sized, code-compliant liner for all gas and oil appliances. Liner installation by DME Maintenance meets all Nassau County requirements under License #H0101570000. After installation, we recommend an annual chimney cleaning to maintain liner performance.

DME Maintenance includes a full inspection with every chimney cleaning at no extra charge. A standalone inspection is quoted on-site — call 516-690-7471. Level 2 camera inspection for home sales or after a chimney fire is priced separately.

A Level 1 inspection is a visual examination of all accessible components — the standard annual inspection. A Level 2 inspection includes video camera scanning of the full flue interior and is required when selling a home, after a chimney fire, or when changing fuel types. DME Maintenance performs both in Nassau County.

The NFPA recommends annual chimney inspection for every fuel type — gas, oil, and wood. Nassau County's coastal environment and freeze-thaw cycles make annual inspection especially important. Many homeowners book inspection and cleaning together in the fall before heating season.

Yes. Even unused chimneys are exposed to weather year-round. A missing or damaged cap, cracked chimney crown, or failed flashing can allow water damage whether the fireplace is used or not. Annual inspection catches these early.

Our 21-point inspection covers: chimney cap, crown, flashing, exterior masonry and mortar joints, damper, firebox, smoke chamber, and flue liner condition. You receive a written report with photos and honest repair recommendations — no pressure.

Yes, in most cases. Mortgage lenders frequently require a Level 2 chimney inspection when a home has a fireplace or chimney. Even when not required, a chimney inspection protects buyers from inheriting expensive problems — a liner replacement or structural repair discovered after closing is entirely the buyer's cost.

A Level 2 inspection includes a full visual examination plus video camera scanning of the flue interior. It is required by the NFPA when selling a home, after a chimney fire, or when changing fuel types. Most Nassau County mortgage lenders accept DME Maintenance's written Level 2 report for underwriting purposes.

DME Maintenance typically schedules Nassau County inspections within the same week. For urgent closing timelines, call 516-690-7471 directly — we accommodate rush inspections when our schedule permits. Written report with photos is delivered the same day as the inspection.

DME Maintenance provides a written repair estimate alongside the inspection report. This gives buyers and sellers documentation for price negotiation or seller concessions. Common findings include liner replacement, crown repair, and chimney pointing — all of which DME Maintenance can repair immediately after closing.

Yes. Our inspection report includes technician name, license number (#H0101570000), inspection date, photo documentation, findings, and repair recommendations in a format suitable for real estate attorney review and mortgage lender submission.

Call DME Maintenance immediately if: your carbon monoxide detector has alarmed, you can smell combustion gases inside your home with the heating system running, your boiler or furnace has shut down and you suspect a flue blockage, a storm has displaced chimney components, or you had a puffback. Do not restart the appliance until the flue is inspected and cleared.

DME Maintenance responds to Nassau County emergency chimney calls same day — often within a few hours for active carbon monoxide or no-heat situations. 24-hour response available for urgent safety concerns. Call 516-690-7471 directly for the fastest response.

Immediately: evacuate the home, call 911, then call DME Maintenance at 516-690-7471. Do not re-enter until emergency services have cleared the home. A blocked or cracked flue is one of the leading causes of CO poisoning in Nassau County homes. DME Maintenance will inspect and clear the blocked flue and assess liner condition before the appliance is restarted.

Yes. Modern furnaces and boilers have safety sensors that shut the unit down when flue pressure is abnormal — which happens when the flue is blocked or restricted. A chimney blockage, collapsed liner section, or frozen condensate line can all trigger a shutdown. Call DME Maintenance at 516-690-7471 before calling your HVAC technician — the fix may be a chimney issue, not an equipment issue.

If a chimney cap has blown off, masonry has been displaced, or the chimney crown is visibly cracked after a storm — yes, call DME Maintenance before using the appliance. Rain entering an uncapped flue, or debris from a damaged crown falling into the firebox, can create blockages that back combustion gases into the home.

DME Maintenance installs top-sealing dampers starting at $999 in Nassau County. Throat damper repair is quoted on-site after inspection — call 516-690-7471. Top-sealing dampers are almost always the better long-term value: they seal tighter, last longer, and solve the summer odor and winter draft problem simultaneously.

A throat damper is the traditional cast-iron plate inside your firebox, just above the fire. A top-sealing damper installs at the very top of the flue and uses a rubber gasket to seal the chimney from above. Top-sealing dampers provide a far tighter seal, prevent animal entry, and eliminate summer odors — something a throat damper cannot do.

A throat damper that appears closed rarely seals fully — the cast iron warps from years of heat exposure and leaves gaps. Cold air falls through these gaps continuously. A top-sealing damper eliminates this entirely by sealing the flue at the top with a rubber gasket rated for tight closure.

Usually yes. In summer, air-conditioned homes create negative pressure that draws air down the flue — pulling creosote and moisture odors with it. A failed or partially open throat damper has no defense against this. A top-sealing damper stops it completely, and an annual chimney cleaning removes the creosote that causes the odor.

Throat damper replacement requires working inside a firebox and fitting a specific throat size — mistakes create a permanent draft problem. Top-sealing damper installation requires roof access and proper fit to your flue tile. DME Maintenance installs both types in Nassau County — most jobs completed in under two hours. Call 516-690-7471.

DME Maintenance charges from $149 for dryer vent cleaning in Nassau County. Combining dryer vent cleaning with your annual chimney cleaning saves a separate service call — call 516-690-7471 to schedule both in one visit.

The NFPA and most appliance manufacturers recommend annual dryer vent cleaning. If you do multiple loads per day, have a longer vent run (common in Nassau County split-levels and colonials), or notice longer drying times — clean more frequently.

Key signs: clothes take two cycles to dry fully, the dryer exterior feels very hot after a cycle, the laundry room feels humid after drying, you notice a burning smell, or the exterior vent flap doesn't open during drying. Any one of these warrants immediate cleaning.

Yes. The U.S. Fire Administration identifies clogged dryer vents as the leading cause of home appliance fires — approximately 2,900 fires per year nationally. Lint is highly flammable and accumulates in the duct with every load. Annual cleaning is the only effective prevention.

Yes — and this is the most efficient way to book both services. We're already at your home with the equipment. Dryer vent cleaning typically adds under an hour to a chimney service visit. Call 516-690-7471 or mention dryer vent when booking your chimney cleaning.

Chimney flashing is the metal system sealing the joint between your chimney and roof. It consists of step flashing along the chimney sides and counter flashing embedded into the chimney mortar joints. It leaks when mortar cracks release the counter flashing, step flashing corrodes, or previous caulk repairs dry out and crack — typically within 1–3 years.

If water staining appears on your ceiling or walls near the chimney base — especially during rain but not snow melt — the leak source is almost always chimney flashing, not the roof shingles. DME Maintenance provides free on-site diagnosis to confirm the exact source before any repair work begins. Call 516-690-7471.

Chimney flashing repair cost varies significantly by the extent of failure and whether counter flashing re-embedding, step flashing replacement, or saddle/cricket work is needed. DME Maintenance provides free on-site estimates with written scope and photos — no obligation. Call 516-690-7471 to schedule.

Caulk and roofing cement are temporary measures that typically last 1–3 seasons before drying and cracking. They do not address the root cause — usually counter flashing that has pulled free from the chimney mortar joint. DME Maintenance re-embeds counter flashing into fresh mortar for a permanent repair.

Often yes. Flashing failures usually accompany deteriorated mortar joints — the same moisture that compromised the flashing has worked into the masonry. DME Maintenance assesses the full chimney during every flashing repair and recommends combining with ChimSaver waterproofing to protect the repaired surfaces.

Yes — and it is one of the most common causes. A blocked, cracked, or improperly lined chimney prevents combustion gases from venting outside. CO then migrates into living spaces. Nassau County homes with aging clay tile liners and recent gas conversions are at elevated risk. Annual chimney inspection is the primary prevention.

Immediately: (1) Evacuate everyone from the home — do not stop for belongings. (2) Call 911 from outside or a neighbor's home. (3) Do not re-enter until emergency services have cleared the home. (4) Call DME Maintenance at 516-690-7471 — we inspect and clear the chimney and assess liner condition before your heating system is restarted.

Test CO detectors monthly using the test button. Replace batteries annually. Replace the unit itself every 5–7 years — CO sensors degrade over time and older units may not alarm at dangerous levels. Place detectors on every level of your home and outside every sleeping area.

Yes — and especially so. New high-efficiency furnaces produce cooler, more acidic exhaust gases that deteriorate old clay tile liners faster than older equipment. A gas chimney inspection after any appliance replacement is essential. Most appliance manufacturers and Nassau County municipalities require a stainless steel liner when installing new equipment.

The five most common causes: (1) Bird or animal nest blockage in the flue. (2) Cracked or collapsed clay tile liner sections. (3) Improperly sized flue for the appliance — common after oil-to-gas conversions. (4) Disconnected or damaged flue connector pipe. (5) Frozen condensate in high-efficiency appliance vents during extreme cold. All are preventable with annual chimney cleaning and inspection.

The most common causes are a blocked flue, a stuck damper, negative air pressure, or a cold flue. Stop using the appliance and call DME Maintenance at 516-690-7471 for a same-week diagnosis.

Yes. Smoke contains carbon monoxide. If smoke is entering your living space, stop using the appliance immediately. If your CO detector has alarmed, evacuate and call 911.

Backdraft occurs when air pressure causes flue gases to flow down instead of up. Common triggers include exhaust fans, new insulation, or a cold flue. A top-sealing damper and proper flue sizing prevent most backdraft.

The most common causes are a blocked flue (birds, debris, creosote), a stuck or missing damper, negative air pressure in the house, a cold flue that hasn't been primed, or a poorly designed fireplace opening that's too large for the flue. DME Maintenance diagnoses the specific cause rather than guessing.

Modern tight construction — sealed windows, exhaust fans, energy improvements — can create negative air pressure inside the house. The house tries to pull replacement air from wherever it can, including down the chimney flue. Solutions include cracking a window near the fireplace, installing an air inlet, or upgrading to a sealed combustion insert.

If smoke is entering the living space, do not use the fireplace until the cause has been diagnosed and corrected. Combustion gases including carbon monoxide can accompany smoke. Call DME Maintenance at 516-690-7471 for a diagnosis before the next fire.

Air-conditioned homes create negative pressure that draws air down the chimney — pulling creosote odors into the living space. A top-sealing damper stops this. Annual chimney cleaning removes the creosote causing the odor.

Creosote odor means deposits inside the flue are being activated by heat and humidity. Annual cleaning removes the source.

A musty smell usually means moisture in the flue from a cracked crown, missing cap, or failed flashing. Have the crown, cap, and flashing inspected.

Summer chimney odors are almost always one of two things: creosote activated by heat and humidity coming down an open damper, or animal debris in the flue. A top-sealing damper eliminates the open flue path that allows outside air — and odors — to enter. Annual cleaning removes the creosote source.

Campfire or wood-smoke smell from an unused fireplace means creosote deposits in the flue are off-gassing as temperatures rise. Annual cleaning removes Stage 1 and Stage 2 creosote before it becomes a persistent odor problem. A top-sealing damper prevents the chimney from acting as an intake during warm months.

Creosote odor is unpleasant but not immediately dangerous when the fireplace isn't in use. Animal debris and nesting material in the flue creates both odor and a blockage risk — and should be removed before using the fireplace. Call DME Maintenance at 516-690-7471 to identify the source.

The five most common entry points: a missing cap, cracked crown, failed flashing, deteriorated mortar joints, or a cracked flue liner. Proper diagnosis requires checking all five.

Water inside the firebox after rain usually means a missing cap or cracked crown. Call 516-690-7471 for free on-site diagnosis.

If staining appears near the chimney after rain with intact shingles, the source is almost always flashing failure at the roof-chimney joint.

Yes — ChimSaver waterproofing applied after crown repair, pointing, or flashing work seals all repaired surfaces permanently.

Possibly, but not certainly. Ceiling stains near a chimney can come from flashing failure (most common), a cracked crown, a missing or damaged cap, failing mortar joints, or an unrelated roof leak. DME Maintenance systematically inspects all potential entry points before recommending repairs — we find the actual source rather than guessing.

Water in the firebox almost always comes from a failed or missing chimney cap, a cracked crown, or severely deteriorated mortar joints at the top of the chimney. Less commonly it comes from flashing failure. Call DME Maintenance at 516-690-7471 for an on-site diagnosis.

Book in August or September. By October appointments are limited. By November you may wait 2-3 weeks.

The NFPA recommends annual inspection and cleaning for every fuel type. For oil systems, annual cleaning is mandatory.

Full flue sweep, creosote removal, draft and CO testing, 21-point inspection, before/after photos, and written safety report emailed same day.

September and early October. Scheduling in September means you beat the rush — November and December bookings fill up quickly as homeowners scramble before the first cold snap. Early scheduling also gives time to address any issues found before heating season starts.

DME Maintenance performs a complete Level 1 inspection — cap, crown, flashing, mortar joints, damper, firebox, smoke chamber, and liner — plus a full cleaning of the flue. You receive a written report documenting the chimney condition. If anything needs attention before winter, you have time to address it.

From $165 for gas or oil flue cleaning, from $195 for wood fireplace sweeping. Includes full 21-point inspection and written safety report.

Stainless steel liner installation starts at $1,670. Final cost depends on flue length, diameter, insulation, and permit fees. Written estimate after on-site measurement.

Crown repair starts at $395. DME Maintenance recommends combining with ChimSaver waterproofing in a single visit.

Chimney condition is the main variable. A cap on a clean chimney is straightforward. The same job on a chimney with a deteriorated crown and partial blockage requires additional work first.

Estimates for repair work are free and provided on-site after a visual inspection. There is no charge to come out and assess a repair situation. Standalone inspection-only visits (without cleaning) are quoted when you call — pricing depends on the inspection level required.

Chimney repair pricing varies significantly based on chimney height, access, extent of damage, and what we find on inspection. An honest repair estimate requires seeing the chimney. Phone quotes without inspection are either wildly inaccurate or deliberately low to get in the door. DME Maintenance provides written, itemized estimates on-site — before any work begins.

DME Maintenance charges flat rates: driveways from $350, walkways from $175, decks and patios from $350, house siding (1-story) from $450, house siding (2-story) from $650. A full exterior package — siding, driveway, walkways, and patio in one visit — starts at $895. Free on-site estimate. Call 516-690-7471.

Power washing uses heated water, which is significantly more effective at dissolving grease, oil, mold, and organic buildup than cold-water pressure washing. DME Maintenance uses hot-water power washing equipment for all residential jobs in Nassau County — the results are noticeably better on Long Island driveways and siding that accumulate salt, mold, and algae.

Yes — when done by a professional using the correct pressure settings and nozzles for each surface. DME Maintenance uses lower pressure for wood decks, composite decking, and vinyl siding, and higher pressure for concrete driveways and sidewalks. We pre-inspect every surface and protect landscaping, outlets, and windows before starting.

Most Nassau County homes benefit from power washing every 1–2 years. South Shore homes near the water — where salt air accelerates mold, algae, and staining — may need annual cleaning. Driveways and patios benefit from cleaning every 12–18 months depending on tree cover and traffic.

Yes. Oil and grease stains require pre-treatment with a degreasing solution before power washing. DME Maintenance applies surface-appropriate pre-treatments for oil stains, mold, algae, and rust before washing. Results depend on how long the stain has been set and the driveway material — concrete responds better than asphalt.

Yes — DME Maintenance provides power washing throughout all of Nassau County including the South Shore, North Shore, Five Towns, and all mid-Nassau communities. Same-week appointments available. Nassau County License #H0101570000. Call 516-690-7471.

Yes. The full exterior package covers house siding, driveway, walkways, and patio in one visit — starting at $895 for most Nassau County single-family homes. Bundling is more cost-effective than scheduling each surface separately. Free on-site estimate — call 516-690-7471.

Yes. Nassau County code and appliance manufacturer requirements both mandate a properly sized stainless steel liner before a new gas appliance can be put into service. Your existing oil flue is oversized for gas venting and contains oil residue that deteriorates with gas combustion. DME Maintenance handles the liner installation and provides full documentation for your permit file. Nassau License #H0101570000. Call 516-690-7471.

DME Maintenance installs stainless steel chimney liners for oil-to-gas conversions starting at $1,670 in Nassau County. Final cost depends on flue height, required liner diameter (typically 4", 5", or 6" for residential gas applications), and whether insulation wrap is required. Free on-site estimate — call 516-690-7471.

Schedule the liner installation before your gas company completes the conversion, not after. If the liner is in place when National Grid or your plumber arrives, everything is ready and the conversion proceeds without delay. If you wait until after, you may be without heat while coordinating the liner installation. DME Maintenance typically schedules within the same week as your call — 516-690-7471.

Liner diameter is determined by your new appliance's BTU output and the length of the flue. Most residential gas boilers and furnaces in Nassau County require a 4", 5", or 6" diameter stainless liner. DME Maintenance measures on-site and sizes the liner precisely to your appliance specification — no guesswork, full documentation provided.

Yes. DME Maintenance coordinates regularly with plumbers and gas utilities throughout Nassau County on oil-to-gas conversions. We provide the liner installation documentation your plumber needs for the permit file and that National Grid or PSE&G requires before completing the conversion. Call 516-690-7471 to schedule.

The new gas appliance will produce cooler exhaust that condenses inside the oversized clay flue. That acidic condensate deteriorates the clay tile and mortar joints, eventually cracking the liner. A cracked liner is a carbon monoxide pathway into the home. It also voids the appliance manufacturer's warranty and will fail Nassau County inspection. A properly sized stainless steel liner eliminates all of these risks.

Yes. DME Maintenance is a factory-authorized stainless steel chimney liner installer — every liner comes with a lifetime warranty. Installation is documented with liner specifications, install date, and manufacturer warranty information for your records.

DME Maintenance prices chimney rebuilds based on scope after on-site inspection. Partial above-roofline rebuilds (upper courses only) typically run $1,200–$2,500. Full above-roofline rebuilds start around $3,500. Complete chimney reconstruction from foundation to cap starts around $6,000–$8,000 depending on height, materials, and liner requirements. Free on-site estimate — call 516-690-7471.

Chimney pointing removes deteriorated mortar and replaces it with fresh mortar — the brick itself remains. A chimney rebuild removes and replaces the actual brick and block structure, not just the mortar. Pointing is appropriate when mortar joints are failing but bricks are intact. A rebuild is necessary when bricks are spalling, the structure is leaning, or the damage is too extensive for mortar repair alone.

Signs that a rebuild may be necessary include: visible leaning or bowing of the chimney stack, large sections of spalling brick (face of brick falling away), multiple failed mortar courses that can't be stabilized with pointing, interior structural failure visible on inspection, previous chimney fire that damaged the liner and masonry, and chimneys that have settled significantly with the house. DME Maintenance assesses on-site and recommends only what's necessary — we'll tell you if pointing will do the job.

We make every effort to source brick that matches your existing home exterior as closely as possible. Exact matches are sometimes difficult with older brick, but DME Maintenance works with Nassau County masonry suppliers to find the closest available match. If an exact match isn't possible, we discuss the options with you before work begins.

For full rebuilds, yes — a new stainless steel chimney liner is installed as part of the reconstruction. For partial above-roofline rebuilds, the existing liner is inspected and replaced if damaged or if the appliance type has changed. Every rebuild includes a new chimney crown and cap.

A partial above-roofline rebuild typically takes one to two days. A full stack rebuild is typically two to three days. Complete chimney reconstruction from foundation to cap may take three to five days depending on height and complexity. DME Maintenance schedules rebuilds with same-week start dates in most cases.

Yes — DME Maintenance performs chimney rebuilds throughout all of Nassau County, including the South Shore, North Shore, Five Towns, and all mid-Nassau communities. Nassau County Home Improvement License #H0101570000. Free on-site estimate — call 516-690-7471.

Common signs: scratching or chittering sounds from the fireplace or heating system area, chirping or bird sounds from inside the flue, strong odor (especially with deceased animal), visible nesting material falling into the firebox, or a live animal appearing in your basement or living space. If you hear sounds, do not light a fire — call DME Maintenance at 516-690-7471 for same-day assessment.

The most common in Nassau County are raccoons (especially females denning in late winter/spring), gray squirrels (frequently fall down furnace flues), starlings and chimney swifts (nest in flue tiles — their nests are a fire and CO hazard), and bats (summer roosting). All of these situations require the same permanent solution: a properly fitted stainless steel chimney cap with animal-guard mesh.

No. Do not run your heating system or light a fireplace if you suspect animal occupancy or a nest in the flue. A compressed bird nest can partially or fully block the flue, causing combustion gases — including carbon monoxide — to back up into the home. Call DME Maintenance at 516-690-7471 before using the appliance.

In most cases yes. For squirrels and birds, DME Maintenance removes nesting material, clears the flue, and installs the stainless steel cap same day. Raccoons with young may require a waiting period. Bats should not be excluded during their active season (May–August) to avoid trapping young inside — cap installation is typically scheduled for September or later for bat situations.

A heavy-gauge stainless steel chimney cap with welded animal-guard mesh around the sides. Standard spark-arrestor screen is not sufficient for raccoons, which can push through lightweight mesh. DME Maintenance installs commercial-grade stainless caps with animal-guard mesh rated to resist raccoon entry — same cap installed as a preventive measure costs the same as one installed after an intrusion.

A stainless steel chimney cap with animal-guard mesh starts at $255 installed through DME Maintenance in Nassau County. If nesting material needs to be removed before the cap is installed, that is quoted on-site. A full flue inspection after animal occupancy — recommended to check for damage — starts at $165. Call 516-690-7471 for a free on-site estimate.

Isolate the bat in one room, do not handle it, and call Nassau County Health Department (516-227-9697) and your physician — a bat found in a living space is a potential rabies exposure event regardless of visible bites. After the immediate situation is handled, call DME Maintenance to schedule chimney cap installation to prevent re-entry.

NFPA 211 requires a Level 2 chimney inspection any time a property changes ownership. Lenders increasingly require chimney documentation as part of underwriting, particularly for homes with wood-burning fireplaces or oil heating systems. DME Maintenance provides Level 2 inspections with same-day written reports suitable for lender review. Nassau County License #H0101570000. Call 516-690-7471.

A Level 2 chimney inspection includes everything in a Level 1 inspection plus a video camera examination of the full flue interior. The camera documents the liner condition, any cracks, displaced joints, blockages, or evidence of prior chimney fires that a visual inspection cannot detect. DME Maintenance delivers a written report with photos of all findings the same day as the inspection.

DME Maintenance offers same-week scheduling across all of Nassau County. For transactions with tight timelines, call 516-690-7471 directly — Douglas Eberling answers, not a call center. We understand that real estate transactions have closing dates, and we prioritize scheduling accordingly.

If deficiencies are found during the Level 2 inspection, DME Maintenance provides a written repair quote on-site before leaving — no second trip required. This gives buyers and sellers everything needed to negotiate the repair cost, request a seller credit, or schedule repairs before closing. Common findings include cracked clay tile liners requiring a stainless steel liner upgrade, failed chimney crowns, and flashing issues.

Call 516-690-7471 or text directly. You can also email tech@nassauchimney.com with the property address, preferred date range, and your contact information. DME Maintenance will coordinate directly with the homeowner or buyer and keep you updated on scheduling and findings. The written report is delivered the same day as the inspection.

Yes — DME Maintenance serves all of Nassau County for real estate chimney inspections, from the South Shore to the Gold Coast. Same-week scheduling available. Nassau County Home Improvement License #H0101570000 — perfect Consumer Affairs record since 2001. Call 516-690-7471.