Waterproofing chimney masonry after repairs in Silver Bluff
Clean, dry, sound masonry first, then a vapor-permeable repellent applied by the method on its data sheet.
- Owned and run locally
- Available for same-day service
- Fully licensed and insured
- Family owned and run
Signs the chimney brick is taking on water
- Flaking or crumbling brick faces
- Sandy mortar washing out of joints
- Hairline gaps between brick and mortar
- Soil or mulch piled against the base
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Our waterproofing approach, one step at a time
Paint and clear repellents do not mix
A clear penetrating repellent is made for bare masonry. Product data rules out painted surfaces, because the treatment cannot reach the pores through paint. On a painted chimney, a repellent would sit on the paint and do little.
If your chimney is painted, the choices are different. The paint itself may need attention, or it may be fine as it is. We explain what we see and whether any treatment is sensible. Removing paint to allow a repellent is a separate job with its own risks, and we discuss it before recommending it.
Make the top watertight first
Repellent makers ask for the top of a wall to be capped and watertight before treatment. On a chimney, the top is the crown and the cap. If rain can get in at the top, treating the sides will not stop it, and trapped water can do harm.
We check the crown, the joint around the flue and the cap before recommending waterproofing. If the top needs work, it goes on the estimate first, under its own name. Treatment of the faces follows once the top is sound.
Why the brick has to breathe
Water gets into masonry in more ways than rain on the face. It can come from condensation, from a leak at the top or from a gap at the roof line. Once inside, it has to leave, and it leaves mainly by evaporating through the face.
A breathable repellent keeps most liquid water out while letting vapor escape. A sealing coating can block that escape, so the water stays in. Over time that can stain, cloud or break the brick. That is why we recommend only breathable treatments for chimney masonry.
Footing and cover on the roof during treatment
Treating a chimney usually means working from the roof around it. Tile and some other roofing can crack under careless footing, and overspray can mark the surface. The roof needs as much protection as the windows below.
We plan where we will stand and where equipment will rest, and we cover the roofing close to the faces being treated. If a tile is damaged during the work, we tell you and deal with it. The roof around the chimney is left as we found it.
Preparation items listed before sealing
- Masonry type identified on each face
- Brick faces checked for flaking or cracks
- Test area including patched sections
- Plants below the chimney protected
Chimney sealing questions, answered
Is chimney waterproofing the same as painting the brick?
No. Paint forms a film over the masonry and changes its look. A penetrating repellent soaks into the pores, keeps liquid water out and lets vapor escape. On a chimney we recommend only the breathable kind, and the estimate names the product.
How do I know if my chimney needs waterproofing at all?
Watch the brick after rain. Faces that darken and stay dark long after the rest has dried are absorbing more water than they should. The free inspection checks that, along with the joints, top and flashing, and we tell you if treatment is not worth it.
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.
More Ways to Care for Your Fireplace
- Ventless Gas Fireplace ServiceService the identified vent-free appliance without bypassing its required safety components.
- Hurricane and Storm Damage Chimney RepairAssess storm-related chimney concerns and distinguish temporary protection from permanent component repair.
- Smoke Chamber RepairRepair identified smoke-chamber surfaces with the access and material requirements clearly defined.
- Firebox RepairRepair the damaged fireplace chamber using an approach suited to masonry or manufactured components.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo