Breathable waterproofing for chimney brick in Coral Shores
A test area on your chimney shows how the brick takes the product before the whole stack is treated.
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Masonry clues that point to waterproofing in Coral Shores
- Glossy patches from an earlier coating
- Rain no longer beading on treated brick
- Brick grit collecting on the roof below
- Runoff streaks below the cap
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Repairs, preparation and a named repellent
Treatments made for clay brick
Clay brick behaves differently from concrete, block and natural stone. It has a different pore structure and chemistry. Brick industry guidance warns that a treatment made for another material may not suit brick and can even harm it.
We check what your chimney is built from before choosing a product. The product data has to list that material as suitable. If the chimney mixes materials, such as brick with a concrete crown or a stone band, each surface is considered on its own.
The crown has its own coating
The concrete or masonry top of a chimney sheds water from the flue outward. When it has fine cracks, a crown coating made for that purpose may be used. That is a different product from a face repellent, and it belongs to crown repair.
We check the crown as part of preparing for waterproofing, because the top has to be sound first. If it needs coating or rebuilding, that appears as its own item. The face treatment is then priced separately, and each has its own reason on the estimate.
What the word sealer can hide
Products sold as chimney sealers vary widely. Some are breathable penetrating repellents. Others form a film on the surface. Preservation guidance notes that repellents are often wrongly called sealers, which adds to the confusion.
Read the product data, not the front of the can. It should say whether the product penetrates or forms a film, which surfaces it suits and whether it lets vapor pass. We explain the product we propose in those terms, so you know exactly what kind of treatment is going on your chimney.
Water-based and solvent-based products
Repellents come in water-based and solvent-based forms. The carrier affects the conditions for application, the odor and the regulations the product must meet. Water-based products tend to have less odor, which helps when the house is occupied.
We choose the carrier with your household and the masonry in mind, within the product's data. Tell us if odor is a concern, for example with young children or someone sensitive at home. We explain what the chosen product is like to live with during application.
What we look at before sealing a chimney in Coral Shores
- Masonry type identified on each face
- Written record of product and faces treated
- Firebox and flue interior left out
- Renewal check on a later maintenance visit
Questions about chimney waterproofing
Which products do you use on chimney brick?
Breathable penetrating repellents, usually siloxane or silane types, from makers that publish full technical data. The product has to list your masonry as a suitable surface. The estimate names it, so you can read its data sheet before you approve anything.
What does the workmanship warranty cover on a treatment?
Our warranty applies to the workmanship, meaning the cleaning, masking and application set out in the written record. Faces outside the agreed scope, and later cracks from other causes, fall outside it. Ask before you approve how a future problem would be looked at.
Will the treated brick still let moisture out?
With a breathable repellent, yes. It keeps most liquid water from soaking in while letting water vapor leave through the face. That matters on a chimney, because moisture reaches the masonry from inside as well, and a sealing film could hold it in.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo