Chimney Waterproofing with ChimSaver — Breathable Protection

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.