Chimney Waterproofing in North New Jersey

The words get used loosely. What matters is whether the product breathes. Film-forming sealers and paints block water in both directions and trap moisture inside the masonry, which makes freeze-thaw damage worse. Breathable repellents soak in, repel liquid water and still let vapor escape. We only use breathable products on chimneys.

Not if the leak is coming from the crown, flashing or an open flue, which is where most chimney leaks start. Waterproofing addresses water absorbed through the brick and mortar themselves. If your chimney is actively leaking, we diagnose and repair the source first, then waterproof as the last step to protect the repair.

Penetrating repellents typically protect for a number of years before they need reapplication; the exact interval depends on the product, how exposed the chimney is and how porous the brick is. We tell you what to expect for your chimney and what to watch for as the treatment wears, such as the brick darkening in rain again.

A properly applied breathable repellent is clear and dries without gloss or color change. Some products slightly deepen the color while wet, then return to normal. If your brick is painted or has been previously coated with a film-forming sealer, we discuss that before applying anything.

Chimney size and height, how much surface area is exposed above the roof, the preparation required, and whether any repairs need to be done first. For a chimney that is already in good shape it is one of the more modest services we offer. The estimate is free and includes any prep work we recommend.