Professional Chimney Waterproofing in Kissimmee

Chimney waterproofing is worth it when the brick is soaking up rain, which shows as damp spots, white efflorescence or flaking faces. The crown, cap and flashing must be sound first, because a repellent only protects the brick face. On a chimney that is already dry and solid, waterproofing is a preventive step rather than a repair.

A quality breathable water repellent on chimney brick usually lasts several years before it needs another coat. Sun, rain and the type of masonry wear it down at different rates, and the maker's instructions give the expected span. A simple test is to splash water on the brick: if it soaks in instead of beading, the coat is spent.

Chimney waterproofing is a breathable water repellent sprayed or brushed onto brick, block or stucco above the roof. It soaks into the pores and makes rain bead off, while still letting water vapor escape from inside the masonry. It is different from paint or a clear sealer, which trap moisture and cause spalling.

Chimney waterproofing cost depends on how much brick sits above the roofline and how steep the roof is. The number of cracks and mortar joints to repair before the repellent goes on matters too. The repellent itself is a small part of the job. Your written estimate lists the prep work and the coating separately.