location_on Serving Allen & All of Collin County
verified Locally Owned & Operated
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(972) 521-7225
Brick is porous — it absorbs water like a sponge. In Allen’s climate, absorbed water freezes in winter, expands inside the brick, and cracks it from the inside out. Chimney waterproofing seals the brick surface with a breathable sealant that blocks rain but lets internal moisture escape. It’s the best preventive measure you can add to your chimney. Call (972) 521-7225.
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Standard bricks absorb up to 10% of their weight in water. When temperatures drop below freezing — which happens 20–30 nights per year in Allen — that water expands by 9% as it turns to ice. This expansion cracks the brick from the inside, a process called freeze-thaw damage or spalling.
Most Allen homes have never had their chimney waterproofed. If your home is 10+ years old and the chimney hasn’t been sealed, waterproofing now prevents expensive tuckpointing or rebuild costs later.
$250–$600 depending on chimney size and height. Most single-flue Allen chimneys fall in the $250–$400 range. This includes surface prep, 2-coat application, and water bead testing. Any needed repairs (tuckpointing, crown) are quoted separately.
The breathable sealants we use last 8–12 years depending on sun exposure and weather conditions. Reapplication is easy and less expensive than the initial treatment because no repair work is typically needed on properly maintained chimneys.
No. Paint and standard waterproofing sealers are not vapor-permeable — they seal moisture INSIDE the brick, which accelerates spalling. Chimney waterproofing requires a specialized siloxane-based sealant that blocks liquid water but allows water vapor to pass through.
No. The sealant is completely invisible once dried. It doesn’t add sheen, gloss, or any color change. Your chimney looks exactly the same — it just repels water. You can test it by spraying the bricks with a hose after application and watching the water bead off.
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