Roof Flashing Repair in Houston, TX
Chimneys, sidewalls, valleys, skylights. Flashing is where most Houston roofs actually leak — and where caulk is never the fix.
Flashing is the metal that carries water away from every place the roof plane is interrupted — chimneys, sidewalls, valleys, skylights, and dormers. It is the most common leak source on Houston homes after pipe boots, and the most commonly repaired incorrectly.
The wrong fix is a bead of caulk over the joint. It buys one dry season, then cracks and traps water behind it. The right fix replaces the step and counter flashing so water is shed mechanically, which is how flashing is designed to work.
Houston Flashing Repair Costs
| Service | Typical Cost | Timeline |
|---|---|---|
| Pipe boot / small penetration flashing | $175–$425 | Same day |
| Sidewall step flashing | $350–$900 | 1 day |
| Chimney flashing (step + counter) | $450–$1,400 | 1 day |
| Valley metal replacement | $550–$1,300 | 1 day |
| Skylight reflashing | $450–$1,400 | 1 day |
| Drip edge / eave metal | $4–$9 per linear ft | 1 day |
Chimney flashing on masonry usually requires cutting a new reglet for the counter flashing — that is the difference between a repair that lasts and one that fails next spring.
Where Houston Flashing Fails
- Chimney counter flashing. Mortar joints erode and the counter flashing pulls out of the reglet. Surface-sealed flashing is a temporary measure at best in Houston's freeze-free but high-movement climate.
- Sidewall step flashing. Where a roof meets a vertical wall, individual step pieces must interleave with each shingle course. Continuous L-metal installed instead is a guaranteed future leak.
- Valleys. Valleys carry the highest water volume on the roof. Debris dams, nail penetrations, and corroded metal all put water beneath the shingles.
- Skylight curbs. The head flashing above a skylight takes the full runoff of the slope above it. Once it lifts, water enters directly at the curb.
How We Repair Flashing
- Confirm the flashing joint is the actual water path via attic and roof-side inspection.
- Remove the surrounding shingle courses so new flashing can be properly interleaved.
- Install correctly sized step and counter flashing, cutting a reglet where masonry requires it.
- Reset shingles, seal terminations, and photo-document the completed detail.
Why Homeowners Call Us
- GAF Master Elite® certified
- Registered & insured, based in Katy and serving the full Houston metro
- Free inspections with photo documentation and a fixed written price
- Workmanship warranty on every repair we perform
- We tell you when a repair will do — we do not upsell replacements
Related Pages
We serve the entire Houston metro — from Montgomery County to Galveston, Brazoria, Wharton, and Fort Bend County. See our full service area list.
Get Your Flashing Leak Fixed Properly
Free diagnosis, correct step-and-counter installation, fixed written price.
Call 713-489-4265