Because a chimney punches straight through your roof decking at a sharp 90 degree angle, it takes the brunt of running roof water. Here are the four biggest reasons we see them fail:
Many contractors attempt to fix leaks by slapping roofing tar or silicone caulk over old metal. Under our intense Texas UV sun, those sealants dry up, crack, and pull away in less than a year.
→ Water gets trapped behind the dried tar, accelerating wood rot on the decking below.
If your chimney has siding instead of brick, it is topped with a metal pan. Builders often used cheap, flat galvanized sheet metal that sags inward under heat, holding a puddle of rainwater that eventually rusts through.
→ Water leaks straight down the inside of the chase walls, rotting wood framing and rusting out your metal fireplace unit.
If your chimney is wider than 30 inches, building code requires a small pitched roof saddle called a cricket behind it to split and divert water.
→ Without a cricket, roof runoff, pine needles, and live oak leaves pile up behind the chimney like a dam, forcing water sideways underneath your shingles.
A proper brick flashing setup requires two separate pieces of metal: step flashing woven between shingles, and counter flashing shielding it from above.
→ If counter-flashing is only nailed to the brick face with caulk instead of reglet-cut into the mortar joints, wind-driven rain blows right behind it.
Inspection & Diagnostics
You do not have to wait for water to drip into your living room. Most chimney issues give off clear physical warnings months before drywall damage begins.
Water enters where the roofline hits the chimney. If the metal is loose, we re-anchor counter-flashing into the mortar. If step flashing is rusted or caked in dried tar, we replace it with fresh 26-gauge metal and waterproof underlayment.
Water is leaking from the very top. On wood-sided chimneys, flat builder pans hold puddles and rust through. We replace them with custom 24-gauge stainless steel chase covers that pitch water outward so it never stands.
Powdery residue means moisture is penetrating masonry joints. We grind out failing mortar cleanly and lock in reglet-cut counter-flashing so driving Houston rain cannot soak behind the brick veneer.
If exterior chimney boards crumble or pull away at the roofline, water has soaked internal studs for seasons. Quick patches will fail; we strip the bad siding, sister damaged framing, and re-side with rot-proof James Hardie.
When a chimney wider than 30 inches lacks a diverter, roof runoff and leaves pile up behind it like a dam. We build a pitched wooden saddle (cricket) behind the chase to split torrential water safely around both flanks.
When prolonged leaks compromise internal 2x4 chase framing, patching the exterior leaves structural sagging unresolved. We rebuild the framing uprights to code to keep the flue and fireplace assembly completely secure.
Engineered Durability
Most chimney repairs fail because contractors use cheap galvanized metal and hardware-store caulk that dry out after one summer. We fabricate and install heavy-duty materials designed specifically for our local heat and driving storms:
We use thick, rust-proof metals for our chase covers and flashings. They never corrode, split, or discolor from acid rain or standing water.
Instead of flat metal that sags like a birdbath, we crease our custom chimney caps from corner to corner. This pushes water outward so it runs right off the roof.
When re-siding wood-framed chimneys, we replace soft pine with non-combustible fiber cement that never rots or swells in 90% humidity.
We never use cheap silicone. We seal critical joints with industrial polyurethane that stays flexible under 150°F rooftop heat without cracking.
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Step-by-Step Chimney Restoration
We don't nail new metal over old tar. Every repair is done down to the clean structure so you get a permanent, watertight seal that handles Houston storms:
We clear out the old shingles, rusted metal, and layers of cracked roofing cement until we reach bare wood and brick.
We check the decking and rafters around the chimney. If water has softened the wood, we cut it out and install solid new framing lumber before moving forward.
We wrap the roof deck and run a self-adhering waterproof ice-and-water shield 6 to 8 inches straight up the chimney wall as an extra layer of protection.
We install fresh 26-gauge metal step flashing cards, weaving each piece into every layer of shingles so water sheds cleanly across the surface.
For brick chimneys, we cut a clean 1-inch groove directly into the mortar line with a diamond blade. The top of the metal locks inside this joint and gets fastened with lead anchors—no surface nails that pop loose.
If your chimney is wider than 30 inches, we frame a solid wood saddle behind it to split rushing rainwater and keep debris from backing up under your roof.
Why Houston Homeowners Call Us to Fix Their Chimneys
High humidity leading to mold growth
Mold can develop quickly in humid conditions, leading to health risks and structural damage.
Frequent storms causing damage
Storms can cause significant roof damage, leading to leaks and structural issues.
Real, straightforward answers about chimney crickets, code requirements, chase cap repairs, and flashing costs from our local roofing crew.
Not sure where the water is getting in around your chimney?
Call Standard Roofing at (713) 347-3802. We will climb up, take clear photos of your flashing, cap, and brickwork, and give you an honest plan to fix it right.
We invite you to reach out for all your roofing needs. Our team is available Monday to Friday, ready to assist you with prompt responses.
Phone
(713) 347-3802Address
215 Rittenhouse St Unit E, Houston, TX 77076, United States, Houston, Texas
Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available
