Chimney Waterproofing in St. Augustine, FL
Help the brick shed rain while it still breathes.
- Family run
- Locally owned
- Licensed and insured
- Same-day service
Get Your Free Inspection
Request Received
Got it, thank you. Expect a call from the family to book your free inspection.
Or call us at (904) 943-7482
Short version
Waterproofing a chimney means applying a breathable water repellent made for masonry to the outside of a chimney. St. Augustine Chimney & Sons cleans the brick, repairs open joints and the crown first, then applies the repellent so rain beads off while moisture inside the masonry can still dry out.
Inspect First, Then Save 10%
Free inspection first. Book the waterproofing within 72 hours to take 10% off.
Why Homeowners Call Us Back
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Family run
The company is run by one family, so the people who price the job are the people who answer for it.
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Upfront, honest pricing
The price is on paper before we start. If something changes, we ask before doing more.
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Workmanship warranty
Our workmanship warranty backs every repair we complete.
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Licensed and insured
Licensed and insured, with an experienced crew on every roof and hearth.
Why Chimneys Take On Water
A chimney stands out in the weather on four sides. Brick, block and mortar are all porous, so wind-driven rain soaks into them. When the water cannot dry out, it carries salts to the surface, leaving white efflorescence, and over time it can push the faces off bricks.
Chimney waterproofing does not fix cracks or holes. It slows how much water passes through sound masonry. That is why we repair the joints, crown and cap before any repellent goes on.
Breathable Chimney Sealer, Not Paint
The right chimney sealer is a penetrating water repellent that soaks into the brick and lets water vapour pass out. A film-forming paint or clear coating can trap moisture behind it and make spalling worse. We use products made for vertical masonry and follow the maker's technical data sheet for surface preparation and coverage.
Brick chimney waterproofing and stucco chimneys need slightly different products, so we check what your stack is made of first.
How We Apply a Chimney Water Repellent
We clean the masonry, let it dry, and protect the roof, flashing and nearby siding. The repellent is applied at a low pressure so it soaks in rather than running off. On most chimneys, the visible change is that rain beads on the surface instead of darkening the brick.
Our chimney waterproofing service is often paired with a crown seal and a new cap, since together they close the main water routes into the stack.
When to Waterproof a Chimney
The right time to waterproof chimney masonry is after repairs and before the wettest part of the year. Chimney sealing is not a one-time job; repellents wear down in the sun and need renewing every several years, depending on the product and exposure.
Urgent Chimney Problem in St. Augustine?
The 24/7 emergency line is answered at any hour. Once the house is safe, the family sorts out the repair plan with you.
If there is fire, a gas smell or a carbon monoxide alarm, get everyone out and call 911 first. Report a gas smell to your gas utility from outside the house.
Request a Free Inspection in St. Augustine
- No-charge inspection, priced on paper
- Upfront pricing with no hidden fees
- Family owned and run
Request Received
Got it, thank you. Expect a call from the family to book your free inspection.
What We Check For
- Brick stays dark after rain
- The masonry is soaking up water. A breathable repellent cuts that down once the joints are sound.
- White powder on the brick
- Efflorescence from water moving through. We find and close the water route first.
- Damp patch inside after storms
- Rain is soaking through. Joint repair plus a repellent usually helps.
Questions We Hear Often
Is chimney waterproofing necessary?
Chimney waterproofing is worth it on porous brick that stays dark after rain or shows white efflorescence. A breathable repellent cuts how much water the masonry absorbs; sound joints, a good crown and a cap come first, and the repellent protects what is left.
How long does chimney waterproofing last?
A good penetrating water repellent usually lasts several years on a chimney, depending on the product, the sun and the rain it faces. Rain stops beading on the brick as the repellent wears. We check the surface at each inspection and tell you when it needs renewing.
How do you prevent chimney leaks?
Preventing chimney leaks comes down to keeping each water route closed. A cap stops rain at the flue opening, a sound crown sheds water off the top, flashing seals the roof line and tight mortar joints keep rain out of the brick. A breathable repellent on the brick finishes the job.
Proudly American
Owned and run by one St. Augustine family. Our experienced crew puts every estimate on paper and backs its repairs with a workmanship warranty.
Call Now (904) 943-7482Help the Chimney Shed Rain
Brick repair, a repellent, or both? We check before anything goes on the brick.