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CertainTeed Home Additions & ADU: The Houston Owner’s Guide
CertainTeed home additions and ADU projects in Houston typically run $45,000 to $130,000 for the full scope, depending on square footage, foundation work, and finish level. That’s the installed number with materials, labor, permits, and our written guarantee included. Most owners land here when an existing addition has failed at a structural or envelope point: a roof tie-in leaking during a Houston downpour, siding that’s separated at the seam, or a window flashing detail that was never done right the first time.
We’re Bradford Remodeling Co Houston, an independent contractor. We are not affiliated with CertainTeed, but we install and repair their products every week, and we know exactly how their material specs behave in Gulf Coast humidity and heat. Curtis Lane, our owner, has been running crews in Houston for over a decade and keeps a worn copy of the local building code on his truck’s center console. He reads a scope of work fast and misses nothing in the fine print.
Which CertainTeed Models This Applies To
CertainTeed’s home addition envelope products span several lines: Monogram and Cedar Impressions vinyl siding, Restoration Millwork exterior trim, Symphony and Landmark roofing shingles, and MemBrain smart vapor retarder for walls and ceilings. The gotcha most Houston homeowners run into is product series compatibility at transition points. A Monogram siding panel does not lock into Cedar Impressions trim the same way, and mixing them at a corner or soffit line creates a seam that will fail inside a few wet seasons.
How to identify what you have: look for the manufacturer stamp on the back of an exposed panel or the nailing hem. CertainTeed stamps include the series name and a production date code. For roofing, pull a shingle from the pack or check the ridge cap label. If you can’t read it, take photos of the profile and width. We’ll match it from the truck. On OEM versus aftermarket: for siding and trim, OEM is the only call that makes sense. Third-party panels fade at a different rate and the lock geometry is rarely exact. For roofing underlayment and flashing, a spec-equivalent aftermarket product from GAF or Owens Corning can work, but only if the material meeting the CertainTeed system spec is documented in writing.
Styles & brands we work with
Signs Your CertainTeed Home Additions & ADU Is Failing
- Water staining at the ceiling where the addition ties into the original roofline. Almost always a flashing detail that was undercut or stepped wrong at the transition. Houston’s rain drives sideways, and a two-inch overlap that works in dryer climates fails here within two years.
- Siding panels that have popped free at the bottom lock. This happens when the original installer nailed too tight and didn’t leave thermal expansion room. CertainTeed vinyl moves. The panel binds, the lock releases, and wind gets behind it.
- Musty smell or peeling paint on interior walls of the addition, usually low on the wall. A vapor barrier that was installed on the wrong side or skipped entirely. Houston’s humidity pushes moisture from outside in. CertainTeed’s MemBrain is designed to breathe one direction. Install it backwards and the wall collects water.
- A visible gap or separation at the outside corner of the addition where the two exterior walls meet. Foundation movement is the usual cause. Houston clay soil expands and contracts, and a corner that wasn’t properly framed with a movement allowance will open up.
- Roof shingles on the addition curling or losing granules faster than the original house. This points to either a ventilation problem in the new roof deck or a different CertainTeed shingle line that was used without matching the slope rating. Steep-slope Landmark shingles on a lower-pitch addition roof will cook in Houston’s heat and fail early.
Replacement Cost & What’s Included
Here’s how the money breaks down in Houston:
- Full home addition, 400-800 sq ft, with foundation, framing, CertainTeed exterior, roofing, HVAC rough-in, and finish work: $45,000 – $130,000
- ADU construction, detached, full systems and finishes: $90,000 – $220,000
- Garage conversion to living space: $30,000 – $80,000
- Exterior envelope repair only (siding, flashing, trim, vapor barrier correction): $3,500 – $15,000 depending on scope
What drives the range: square footage, crawlspace versus slab foundation, whether the existing roof tie-in needs structural correction, and the finish level inside. We give you a written price before any work starts. No numbers move at the door. That’s the Garrison Standard, and it applies to every project we write. Every completed job carries our 365-Day Done Right Promise: if the work fails within a year, we come back and correct it at no charge. You get that promise in writing.
See the difference
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AfterDIY or Call Us?
You can safely check a few things yourself: look for obvious siding separation, check for water staining after a rain, and photograph any areas that concern you. That documentation helps us quote accurately. But once you’re into removing siding or pulling shingles at a roof tie-in, stop. You’re working at height, often on a ladder against a wall, and a failed lock or a loose shingle can put you on the ground fast. Roofing and exterior envelope work on an addition is not a weekend project. And if you open the wall and find the vapor barrier installed incorrectly, fixing it right means opening the full assembly, not patching it.
Straight scope, straight number, that’s the whole conversation. Call (940) 289-7658 and we’ll come look at what you have, confirm the CertainTeed series, and put a written estimate in your hand.
FAQs
A properly installed CertainTeed addition envelope should last 25 to 40 years on the siding and trim, and 20 to 30 years on the roofing, even in Houston’s heat and humidity. Failures happen early when the original installer skipped a flashing detail or misapplied the vapor barrier. Call (940) 289-7658 and we’ll tell you honestly whether your addition is worth repairing or needs a section replaced.
Most failures are repairable at the failure point: a flashing detail, a lock seam, a vapor barrier section. Full replacement only makes sense if the framing or sheathing behind the CertainTeed product has rotted or the foundation movement is severe. We’ll open it up and show you what we find before we quote you a number.
A flashing or siding repair on an addition typically takes one to two days. A full envelope replacement can run three to five days. A whole addition or ADU build runs two to six months depending on scope. We’ll put the schedule in writing with the price.
We stock common CertainTeed Monogram and Cedar Impressions profiles and Landmark shingle colors on our trucks, and we can pull any other CertainTeed line from our Houston suppliers within a day or two. Call (940) 289-7658 with your product label photo and we’ll confirm availability while you’re on the phone.
Get a Written Price from the Houston Crew That Shows Up
If your CertainTeed addition has a failing roofline, siding that’s separating, or water where it shouldn’t be, don’t wait through another Houston storm season. We’re Bradford Remodeling Co Houston. We also work with KraftMaid, Cambria, Silestone, and a roster of documented brands, so every specification on your project is traceable. A live person answers our phones 24/7. Background-checked, uniformed technicians show up on schedule. And every price is in writing before we begin.
Call (940) 289-7658 for a free estimate. We’ll confirm your CertainTeed series, walk the scope, and give you a number that won’t move.
Written by Curtis Lane, Owner, Bradford Remodeling Co Houston at Bradford Remodeling Co Houston, serving Houston and nearby areas.
