Cap installation
A damaged cap is replaced to keep rain out of the inside of the chimney.
Masonry Repair
Chimney Waterproofing DuBois, PA
A chimney sweep in DuBois can waterproof a masonry chimney with a breathable, vapor-permeable repellent that keeps rain out while letting moisture escape, after cracks, joints and the crown are repaired. Call (814) 913-0171 to reach a local chimney sweep.
Brick and mortar are porous, and a chimney soaks up a surprising amount of water every time it rains. Over time, the moisture feeds freeze-thaw damage, efflorescence, rusted dampers and deteriorated flue tiles. The goal of waterproofing is to keep that rain on the surface so it runs off.
The product matters more than anything else. Breathable repellents work below the surface: rain beads off, but vapor from inside can still escape. Paint, acrylic coatings and film-forming sealers do the opposite: they trap moisture inside the brick, and when it freezes, it blows the face off the brick.
Waterproofing is the last step, not the first. Cracks, open mortar joints, a cracked crown, failed flashing and a missing cap all let in far more water than porous brick does, so those are repaired first. After the repairs cure, the masonry is cleaned and allowed to dry before treatment.
If the problem goes deeper than it first looked, a DuBois chimney sweep may also recommend chimney leak repair or chimney tuckpointing.
Dealing with this in DuBois, PA right now? Call (814) 913-0171 and describe the problem to a chimney sweep who works in DuBois.
Call nowThe process
What happens during chimney waterproofing
Waterproofing is only as good as the repairs and prep that come before it.
Check for damage
The masonry, crown and flashing are checked, since waterproofing does not replace repairs. Any existing paint or sealer is noted, since it affects what can be applied.
Repair before sealing
Cracked crowns, open joints, spalled brick and failed flashing are repaired before any repellent goes on. New mortar needs time to cure before treatment.
Wash the brick
The brick is cleaned of dirt, efflorescence, moss and loose material. A clean surface lets the product soak in properly.
Let it dry
Repellent is applied only to dry brick, in dry weather. Rain right after application can reduce how well it works.
Apply the repellent
The breathable product is applied generously so it penetrates the masonry. The crown typically gets a separate flexible crown sealer.
Water test
A quick water test confirms the masonry is shedding water. The brick should keep its natural look.
What is included
Parts of chimney waterproofing
Flashing check
Flashing gaps are closed so water does not get in at the roof line.
Masonry water repellent
A vapor-permeable repellent is applied to all exposed masonry without trapping moisture.
Crown coating
A crown coating bridges small cracks and moves with the concrete.
Efflorescence cleaning
The brick is cleaned of mineral deposits and growth without damaging the brick face.
Related service
Chimney Sealing DuBois, PA
When people talk about sealing a chimney, they usually mean closing up all the ways water gets in. A complete job seals crown cracks, closes flashing gaps, caps the flue and treats the masonry with a vapor-permeable repellent. The common thread is that every product used on the masonry must let moisture escape.
For DuBois homeowners, the biggest risk with chimney sealing is the wrong product. Clear acrylic sealers, paint and other film-forming products trap moisture and cause spalling, especially through freeze-thaw winters. Ask what can be done about an existing coating before new products go on.
Local help
Chimney Waterproofing Near Me
Around DuBois, waterproofing is often the last step after a chimney has been repointed or had its crown repaired. From DuBois out to neighboring communities such as Sandy, Treasure Lake, Punxsutawney and Brookville, chimneys that were sealed with paint or non-breathable coatings often show the worst spalling, which is why the right product matters as much as the application.
For chimney waterproofing in DuBois, PA or nearby towns like Sandy, Treasure Lake, Punxsutawney and Brookville, call (814) 913-0171 to reach a chimney sweep who covers your street.
Chimneys in this climate
Winters here are long and cold, and the heating season usually runs from October well into April. The hardest thing on brick here is not the cold itself but the constant swing above and below freezing: rain and melting snow soak into the crown and joints, then freeze and push them apart, which is how cracks, loose bricks and leaks start. Nor'easters drive rain sideways into flashing and mortar that looked fine in summer. Most homeowners in DuBois, PA schedule a sweep in early fall, and a repair check after a hard winter.
Why call
Why not wait
Less damage
A chimney problem fixed early rarely spreads to the masonry, the liner or the house.
Familiar with local homes
Local sweeps see the same chimney types and weather wear across DuBois and nearby towns.
Know what happens next
Ask your questions before you agree to anything.
Chimney Waterproofing questions
How long does chimney waterproofing last?
Expect several years of protection, with the exact life depending on product and weather. A simple sign is when water stops beading and starts soaking into the brick again. A yearly chimney inspection can check its condition.
Will waterproofing fix my leaking chimney?
Repellent only addresses water soaking through the brick face, while most leaks start at the crown, cap or flashing. The usual leak sources need their own repairs. Repair the source first, then waterproof.
Why would I waterproof my chimney?
The right treatment helps brick and mortar last longer by keeping rain from soaking in. It is a protective step that only pays off once the chimney has been repaired. For chimneys exposed to hard winters and wind-driven rain, it is often a worthwhile final step.
What is the best waterproofing for a chimney?
The right product is a vapor-permeable water repellent, typically siloxane or silane based. They stop rain from soaking in but let trapped moisture out. Products that form a film on the surface can cause the damage they were meant to prevent.
Will painting the chimney keep water out?
Paint traps moisture in the masonry, which is the opposite of what a chimney needs. Moisture from inside and from small cracks gets trapped behind the paint film. A breathable, vapor-permeable repellent is the right product for chimney masonry.
More questions? Call (814) 913-0171
Often needed together
Chimney Leak Repair
Finding and stopping water that gets in through the crown, cap, flashing or brick, whether the drip shows up in the attic, the ceiling or the firebox.
Learn moreChimney Tuckpointing
Restoring the mortar joints that hold a chimney together, before loose brick starts to shift.
Learn moreChimney Crown Repair
Sealing cracked chimney crowns or rebuilding crumbling ones, with a proper overhang and drip edge.
Learn moreChimney Cap Installation
Putting a sturdy cap on top of the chimney so water, birds and debris stay out of the flue.
Learn more
Looking for something else?
See all chimney servicesNeed chimney waterproofing in DuBois, PA?
Call (814) 913-0171 to talk to a chimney sweep serving DuBois, PA.
(814) 913-0171
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