Waterproofing chimney masonry after repairs in Shorecrest
Repairs and treatment appear on separate lines, so you can approve one now and the other later.
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Marks of water soaking into chimney brick
- Brick that stays dark long after rain
- Rain no longer beading on treated brick
- Uneven color across repaired sections
- Runoff streaks below the cap
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Keeping rain from soaking into chimney brick
Broken and flaking brick goes first
Brick with cracked or flaking faces lets water straight in, and a repellent cannot seal it. Brick industry guidance lists replacing such units among the repairs that should come before any clear coating.
We mark the damaged bricks during the inspection and list their replacement as a separate item. The treatment is then planned for the sound masonry that remains. If most of a face is damaged, we say so, because a larger masonry repair changes whether treatment makes sense at all.
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.
The first heavy rain after treatment
The first heavy rain after treatment is a good moment to look at the chimney from the ground. Water should bead and run off the treated faces, and the brick should dry evenly afterward. Areas that darken and hold water deserve a note.
If you see something unexpected, tell us. It may be an area the treatment did not reach, a patch that took it differently or a new crack. We would rather hear about it early and check it than find out at the next maintenance visit.
Being there for the assessment
You do not need to climb anything during the waterproofing assessment. What helps is telling us why you are asking. Dark brick after rain, flaking faces, a past treatment or a leak all point the visit in different directions.
If you cannot be home, someone who knows the history can stand in, or you can tell us by phone beforehand. We explain the findings in person or by phone afterward. The written estimate follows either way, with the repairs and the treatment on separate lines.
Your free waterproofing inspection covers
- Hairline separations along joint edges
- Roof junction flashing condition
- Faces and height to be treated
- Plants below the chimney protected
Questions about chimney waterproofing
Can a repellent close cracks in the brick or the joints?
It cannot. Penetrating repellents work inside the pores, and anything wider than a fine hairline is beyond them. Open joints are repointed, cracked units replaced and gaps sealed before treatment. We list those repairs separately, with the reason for each.
Do repairs have to be finished before the treatment goes on?
Yes. Brick industry guidance puts repairs first, and product data asks for sealant joints to be in place and cured and for the top to be watertight. New mortar also needs its curing time. We set out that order in the estimate so nothing is rushed.
Does a metal flue inside a framed box need waterproofing?
Not with a masonry repellent. A framed chase has no brick to treat. Its water problems come from the cover at the top, the collar around the pipe and the siding or stucco joints, and we look at those instead.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo