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Therma-Tru Roofing: The Houston Owner’s Guide
Therma-Tru does not manufacture roofing products. If you have a Therma-Tru door, sidelight, or transom window that is leaking, flashing-failed, or rotting where it meets your roofline, that is a roofing-adjacent repair we handle in Houston every week. The typical cost to correctly flash, seal, and repair a Therma-Tru entry door or transom assembly where it ties into the roofline runs $400 – $1,800, using the Roof Repair pricing range, depending on substrate damage, flashing condition, and whether the surrounding roof deck needs work. Most Houston owners discover the problem after a hard rain, when water shows up on the interior door casing or stains the ceiling just inside the entry.
For clarity: Bradford Remodeling Co Houston is an independent service provider. We are not affiliated with Therma-Tru. We install and service Therma-Tru doors and frames, and we repair the roofing-adjacent failures around them.
Which Therma-Tru Models This Applies To
Therma-Tru builds entry door systems, not shingles or underlayment. The products we see failing at the roofline in Houston are typically from the Classic-Craft, Fiber-Classic, Smooth-Star, and Pulse lines, along with their matching sidelights and rectangular or elliptical transoms. Each system has a specific rough opening width and frame depth, and the flashing kit must match that depth. A Smooth-Star frame is shallower than a Classic-Craft frame; using the wrong flashing leaves a gap that Houston’s wind-driven rain will find within one season.
How to identify your part: the Therma-Tru data label is on the hinge-side frame edge, usually printed with the series name, manufacture date, and a serial number. Take a photo of it before calling anyone. If the label is gone, measure the frame depth in inches: 4-9/16, 5-1/4, or 6-9/16 are the common production widths. On OEM versus aftermarket: Therma-Tru’s own flashing and sill pan kits are engineered to their frame profiles. We use OEM Therma-Tru components for water-management repairs because aftermarket flashing almost never matches the sill dam geometry. For the roofing side of the repair, we use GAF ice-and-water shield and step flashing, materials we also install on full roof replacements.
Styles & brands we work with
Signs Your Therma-Tru Roofing Is Failing
- Water staining on interior door casing or ceiling above the entry. This means the cap flashing or step flashing is compromised and water is traveling behind the siding. In Houston, where we get 50 inches of rain a year, a small flashing gap becomes a visible stain fast.
- Peeling paint or soft wood at the top corners of the door frame. The door jamb is wicking water. The fix is not paint. The flashing detail at the roofline has to come apart and be rebuilt with proper lap order.
- Caulk that keeps cracking or separating where the door meets the roofline. Caulk is a sealant, not a flashing. If it is doing structural water work, the metal behind it has failed or was never installed to slope away from the opening.
- Visible daylight around the transom or sidelight from the exterior. That is an installation-plane failure, not just a cosmetic gap. In Houston’s humidity, that opening is also letting conditioned air out and wet air in, which warps the frame over time.
- Drywall cracks radiating from the top corners of the door. The header or rough opening has moved. Sometimes this is framing settlement. Often, in older Houston homes, it is decades of slow water intrusion that has softened the rim joist above the door.
See the difference
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After
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After
Before
AfterReplacement Cost & What’s Included
In Houston, a Therma-Tru door assembly repair at the roofline lands in the $400 – $1,800 range. A simple flashing reseal with no substrate damage sits at the low end. Replacing rotted sheathing, rebuilding the rough opening corner, and re-flashing the entire assembly sits at the top. If the surrounding roof deck is also damaged, the repair scope expands into the Roof Replacement range of $8,000 – $20,000, but we will tell you if that is the case before any work starts and write the number down.
Every quote from Bradford Remodeling Co Houston includes the written price before work begins. We do not move the number at the door. The estimate covers materials at documented cost, labor, tear-out and disposal, and the full flashing and sealing detail. All work falls under the 365-Day Done Right Promise: if it fails inside a year, we return and correct it at no charge.
DIY or Call Us?
You can safely check a few things without risking injury: look for visible gaps in exterior caulk, photograph any staining for your records, and note whether the problem appears after specific weather directions. What you should not do is pull the door frame, dismantle flashing, or cut into your roof deck. Flashing repairs around an entry door involve working at height on a ladder, removing trim with sharp metal edges in play, and managing water-plane sequencing that is easy to get wrong. Wrong lap order sends water deeper into the wall instead of out, and you will not know it until the next squall. If you are uncertain, call us at (940) 289-7658 and describe what you are seeing. We will tell you over the phone what we think the likely scope is, and you can decide from there.
FAQs
Properly installed flash metal lasts 20 to 30 years in Houston, but the exterior caulk and sealant at the joints typically need inspection every 2 to 3 years. Humidity, UV exposure, and thermal movement stress the sealant long before the metal fails. Call (940) 289-7658 if you want us to inspect yours.
It depends on how much corrosion and substrate damage we find. If the metal is intact and the issue is failed sealant, a repair is appropriate. If the flashing is corroded through or the sheathing behind it is soft, full replacement of that detail is the only fix that will hold. We will show you photos of what we find before you commit to anything.
Most flashing and substrate repairs around a Therma-Tru door assembly take one full day. If we have to rebuild framing or replace a section of roof deck, the job may extend to two days. You will have the timeframe in writing before we start.
We keep common Therma-Tru frame-depth flashing kits and sill pans on the truck, along with GAF step flashing and membrane. Specialty transom and elliptical flashing typically arrives in 2 to 3 business days. Alongside Therma-Tru, our crew works regularly with KraftMaid, Cambria, and Silestone products, so we understand how manufacturer-specific tolerances affect installation quality.
Written by Curtis Lane, Owner, Bradford Remodeling Co Houston at Bradford Remodeling Co Houston, serving Houston and nearby areas.
