Chimney repair tools in Dunwoody, GA
Hear that soft patter in the fireplace after a summer thunderstorm? That’s not rain on the roof; it’s water sneaking through cracked crown mortar and dripping down the flue. Leave it be and smoke stains creep, smells of soot turn sour, and bricks start popping like popcorn. Grab a wire brush, a bucket of crown sealer, and a simple pointing trowel, and you can stop the leak before your next marshmallow roast. Our small Dunwoody crew keeps those same basics in the van-always happy to walk you through a repair or hop on the roof ourselves-so hearths stay spotless without 24-hour upcharges or pricey drone diagnostics.
Find trouble spots first
You don’t need scaffolding or a drone to spot chimney issues early. Start with a pair of binoculars and take a slow look from your yard or driveway. Scan the crown for visible cracks or chunks missing. Check if the cap is crooked, rusting, or gone altogether. Bricks that look crumbly or white with chalky streaks could be spalling from water damage. Once you’re on a ladder and close enough, tap mortar joints lightly with a screwdriver or metal probe. If the tool sinks in easily or the mortar flakes off, it’s time for repointing. Also look for moss growth, missing pieces around the flue, or signs the rain is getting in where it shouldn’t. These checks only take 10-15 minutes and can save you hundreds if you catch problems before the water gets to the roof or attic.
Crown sealer in three steps
The concrete crown on top of the chimney takes a beating from weather, especially in Georgia’s freeze-thaw cycles. Cracks or surface wear let rain seep into the brick and down into your flue or firebox. To stop that, we apply ChimneySaver CrownCoat - 2 Gallon using a simple three-step method. First, wire-brush the surface clean and remove any loose debris, moss, or old caulk. Second, lightly mist the surface with a spray bottle to help the sealer grab the concrete. Third, apply CrownCoat with a thick masonry brush in two overlapping passes-first north-south, then east-west. It dries fast, so work steady and get full coverage. Once dry, it forms a flexible, waterproof membrane that moves with the crown during hot summers and cold snaps. It’s not complicated-it just works.
Mortar pointing basics
Repointing chimney mortar doesn’t take a masonry degree-it just takes patience, the right mix, and steady hands. We start by using a tuck-pointing tool or a small chisel to rake out all the loose or cracked mortar between bricks-aiming for a ½-inch depth so the new mix has something to grip. After clearing the dust with a stiff brush or a quick blast of compressed air, we mist the joints with water. This keeps the brick from sucking moisture out of the new mortar too quickly. We use Type N mortar-it’s the right strength for chimneys and easy to work with. Press the mortar in using a tuck-pointing trowel, packing it firmly and smoothing it flush with the brick face. Tool the joint to match the existing finish-concave, flush, or V-joint. Let it cure slowly and avoid rain for a full day. That’s a tight, long-lasting seal, done right.
Install a cap that lasts
A missing or rusted chimney cap is one of the top reasons water, leaves, and even birds end up inside flues. Replacing it is one of the best upgrades you can do in under an hour. First, measure the size and shape of your flue tile-most are square or round and come in standard sizes. We recommend a stainless steel cap since it won’t rust or stain your brickwork. Seat the new cap evenly over the flue, then tighten the clamp or screws a little at a time so it locks in place without shifting. Finally, run a thick bead of exterior-grade silicone around the base of the cap skirt, where it meets the crown or flue. This helps stop sideways rain from creeping underneath. Done right, a new cap can last 20+ years and protects your entire fireplace system from top to bottom.
Seasonal sweep checklist
Twice a year-once before burning season and once after-you should do a basic chimney maintenance sweep. Start by brushing out the flue with a chimney brush sized to your liner. It clears soot, bird debris, and cobwebs. Then check the spark screen at the cap-clean it with a wire brush and make sure it’s not rusted or bent. Look at the flashing where the chimney meets the roof; reseal if the caulk is cracked or pulled away. Next, check the “cricket” (the small peaked structure behind larger chimneys) and clear off any leaves or nests that could block water drainage. Lastly, inspect the mortar and bricks-hairline cracks can spread fast in wet weather. If anything looks worse than it did last season, take a photo and schedule a patch before winter rolls in. These simple steps can help you avoid leaks, chimney fires, and expensive rebuilds down the road.
Ready to keep smoke in and water out?
We repair chimneys Monday through Saturday-no overnight surcharges, no sensor sales, just straightforward fixes and the tools to DIY if you’d rather. Call, text, or wave when our dusty blue truck rolls past Mount Vernon Market, and we’ll have your hearth ready before cool weather settles in.