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Boral Home Additions & ADU: The Dallas Owner’s Guide
If you’re researching Boral home additions and ADU construction in Dallas, the quick answer is this: a full home addition typically runs $45,000 – $130,000, while an ADU (accessory dwelling unit) built to Dallas code generally lands between $90,000 and $220,000 depending on size, foundation work, and finish level. Penhallow Remodeling Dallas installs and builds Boral-compatible additions and ADUs, and we put your price in writing before any work starts. Most Dallas homeowners reach us after discovering that their Boral siding, trim, or exterior product has failed or underperformed against Texas heat and humidity, and they want a builder who actually knows how Boral materials behave on a Dallas lot.
Which Boral Models This Applies To
Boral manufactures several exterior product lines that show up on Dallas additions and ADUs, and each has its own compatibility quirks. The two you’ll most often see here are TruExterior siding and trim (a poly-ash product with a realistic wood grain) and Boral true brick and stone veneer. TruExterior comes in specific reveal profiles: 4″, 5″, 6″, and 8″ lap siding, plus board-and-batten and panel profiles. If your existing home has 6″ lap, your addition needs 6″ lap from the same product run or you’ll see visible seams and shadow lines where the old meets the new. That’s the kind of detail we check during the estimate, not after the framing goes up.
On veneer work, Boral brick comes in several color blends and modular sizes that are not universal. A Dallas home with Boral’s “Old Chicago” blend can’t be seamlessly matched with a different Boral blend, even if the color looks close on a screen. We verify the original product code from the homeowner’s paperwork or, when that’s missing, by pulling a sample from an inconspicuous corner and matching it at the local supplier. As an independent contractor, Penhallow Remodeling Dallas is not affiliated with Boral, but we’ve built enough Boral additions across Dallas that we know which products age well here and which ones don’t.
OEM vs Aftermarket for Boral Exterior Products
For Boral trim, siding, and veneer, there is no real “aftermarket” equivalent worth installing. The products are proprietary formulas, and substituting a generic fiber cement or vinyl product next to Boral creates a mismatch you’ll see every time you pull into the driveway. We source genuine Boral material for Boral homes. For the structural components behind the exterior – sheathing, house wrap, flashing – we use recognized trade brands that meet or exceed what Boral specifies in their installation manuals. That’s the layer of protection the homeowner never sees but absolutely depends on during a Dallas July thunderstorm.
Styles & brands we work with
Signs Your Boral Home Addition or ADU Is Failing
- Gapping or warping at trim joints. Dallas summers cycle between 100-degree heat and sudden rain. TruExterior resists moisture well, but if the installer didn’t leave the manufacturer-specified expansion gap at butt joints, you’ll see separation or bowing within the first two Dallas summers. The product is doing its job – the installation wasn’t.
- Cracks in Boral brick veneer near the roofline or foundation. North Texas clay soil shifts with drought and rainfall. If the addition’s foundation wasn’t engineered for that movement, the veneer carries the stress and hairline cracks show up at corners and above windows.
- Water staining on interior walls near the addition seam. Where a Boral addition ties into the original structure, flashing details make or break the entire project. We’ve fixed additions in Richardson and Carrollton where the original builder skipped step flashing because it was “too much work.” The stain you see is just the visible part of the problem.
- Mold or soft spots on Boral trim near grade. Boral trim should never touch soil or sit within 6 inches of grade in Dallas without proper clearance. Ground contact wicks moisture, even in a poly-ash product, and once the back of the trim stays wet, the sheathing behind it follows.
- Doors and windows in the addition no longer close square. That’s the foundation talking. Dallas soils don’t move gradually – they move in stops and starts. A Boral addition with a poorly compacted pad or under-sized piers will show itself within 24 months.
Replacement Cost & What’s Included
For Boral-specific repair or replacement work on an existing addition or ADU in Dallas, the range is typically $45,000 – $130,000 for a full addition replacement or major structural repair, while a full ADU build runs $90,000 – $220,000. Smaller scoped repairs – say, replacing failed Boral trim on one elevation and addressing the flashing behind it – usually fall between $4,500 and $15,000 depending on access, height, and how much hidden framing damage we find. Every number includes parts, labor, dump fees, and the 365-Day Done Right Promise in writing.
What drives the range? Access height (a two-story addition costs more to scaffold), the amount of framing repair behind the Boral product, and whether the foundation needs attention before we can warranty anything above it. You’ll get a written line-item price before work starts – not a verbal range, not a “we’ll see once we open it up” number. We’ve been doing this in Dallas long enough to price the visible work and the likely hidden work up front. If nothing is hidden, you pay the written number.
See the difference
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AfterDIY or Call Us?
Some checks are safe for a Dallas homeowner to do: walk the addition after a hard rain and look for standing water against the foundation, check that downspouts discharge at least 3 feet from the slab, and inspect Boral trim joints from the ground for obvious separation. These are diagnostic, not repairs, and they help you know whether to call us.
What you should not do is pull trim, remove veneer, or attempt any structural repair yourself. Boral products are heavy, and removing a section of brick veneer without understanding how the wall is tied back is dangerous. Same story with anything involving a ladder above one story, a reciprocating saw near flashing, or foundation-level work. Trevor Nash started with a framing hammer at fourteen and trained at Los Angeles Trade-Technical College, and even he won’t do a two-story veneer inspection without the right equipment and a second set of eyes. Call (940) 204-5368 and we’ll send a background-checked, uniformed technician to look at it properly.
FAQs
A properly installed Boral addition in Dallas should last 30 to 50 years on the exterior with normal maintenance, and the structural shell should last the life of the home. The weak points in Dallas are almost always installation details – flashing, expansion gaps, and foundation prep – not the Boral product itself. Call (940) 204-5368 and we’ll tell you honestly whether your issue is product or installation.
Most Boral failures can be repaired, but the repair has to address what caused the failure first. We’ve saved Dallas homeowners tens of thousands by replacing flashing and re-securing trim instead of tearing down an entire addition wall. If the framing behind the product is rotted or the foundation has moved, the repair scope grows. We’ll show you exactly what we found and give you a written price for the repair before we touch anything.
A Boral trim or veneer repair typically takes 2 to 5 working days once materials are on-site. A full addition runs 8 to 16 weeks, and an ADU build runs 12 to 24 weeks depending on site conditions, permitting, and finish level. Dallas permitting adds time, and we pull all permits and schedule all inspections so the job passes the first time.
We don’t warehouse Boral siding and veneer, but we order directly from Dallas-area suppliers and typically have materials on-site within 3 to 7 business days. For repair work, we can usually match your existing product by the end of the first visit. We also carry and install materials from KraftMaid, Cambria, and Silestone for interior work – that’s relevant if you’re building an ADU and want cabinet and countertop brands with warranties that stack alongside ours.
Call Penhallow Remodeling Dallas for Your Boral Addition or ADU
If your Boral addition or ADU is showing signs of failure – or if you’re planning a new build and want it done right the first time – call (940) 204-5368 for a free estimate. Trevor Nash will give you a number before he picks up a tool – that’s the only way we know how to start. You’ll get a written price, a real arrival window, and the 365-Day Done Right Promise on every job. A live person answers the phone, and we’ll schedule a time that works for you.
Written by Trevor Nash, Owner, Penhallow Remodeling Dallas at Penhallow Remodeling Dallas, serving Dallas and nearby areas.
