Chimneys are highly exposed to the elements and if left unprotected, are susceptible to structural deterioration. All new and existing masonry chimneys are susceptible to water damage and, even if repaired, chimneys will continue to deteriorate if they are not protected.
Waterproofing vs Sealing – Don’t Trap Water
People commonly refer to the process of water proofing masonry as “sealing”. Moisture is almost always present in masonry. Sealers and Silicone coatings form a water resistant surface film which traps water vapors. If these vapors cannot escape they will contribute to spalling, scaling, and general deterioration to the brick and mortar.
Excel chimney does not use sealers, but rather siloxane based masonry water proofers. These siloxanes do not form a film, but rather are absorbed just below the surface of the masonry forming strong bonds with the silica in the masonry. This offers the highest quality protection, releasing water vapor as it repels the water.