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Boral Home Additions & ADU: The Orlando Owner’s Guide
If you’re planning a home addition or ADU in Orlando and want Boral-compatible exterior materials and trim, the typical installed cost runs $45,000 – $130,000 for the full project, depending on square footage, foundation work, and finish level. We install and source Boral products alongside the structural work, so you’re not chasing a separate parts supplier. Most Orlando homeowners reach out to us after a previous contractor quoted one number and then discovered “unforeseen conditions” after demo. That’s the exact scenario our written pricing exists to prevent.
Boral is best known in this market for its exterior trim, siding profiles, and cladding products, not for selling a pre-built addition kit. So when we talk about Boral home additions and ADUs, we’re talking about a structure built to Orlando code with Boral’s rot-resistant trim and siding spec’d in from the start. The failure point most owners discover is rarely the Boral product itself. It’s the install around it: missing flashing, wrong fasteners, or trim butted too tight against stucco so the first hard rain finds a way in.
Key takeaways:
- Full additions run $45,000 – $130,000; ADU construction runs $90,000 – $220,000
- Boral exterior products are rot-resistant but only as good as the flashing and substrate behind them
- We write the price before we pick up a tool, and the 365-Day Done Right Promise backs the whole project
- College Park and Delaney Park have older framing that changes how a Boral-clad addition ties into the existing house
Which Boral Models This Applies To
Boral’s product line splits into a few families that matter for Orlando additions and ADUs. The TrueExterior siding and trim line is the one we spec most often for new construction here, because it handles Florida humidity without the swelling and paint-peeling you see with wood trim after three or four summers. The Boral Versetta Stone line shows up on accent walls and foundation skirting. If you’re matching an existing Boral-clad section of your house, the product code is usually stamped on the back of a removed piece, or listed on the original permit documents.
Here’s the compatibility gotcha most owners don’t know: Boral TrueExterior trim comes in specific reveal profiles, and the 5/4 board won’t match the look of the 4/4 board up close. If your addition butts against an existing Boral-trimmed wall, you need to know the exact profile before the first cut. We measure that during the estimate, not after the crew shows up. On the OEM-versus-aftermarket question, Boral doesn’t license aftermarket equivalents for its trim profiles. Use genuine Boral or a product the Boral tech line confirms as compatible in writing. Mixing brands mid-wall is how you get wavy sight lines and failed paint adhesion within two years.
Penhallow Remodeling Orlando is an independent contractor. We’re not affiliated with Boral, but we use their products because they hold up in this climate when installed correctly.
Styles & brands we work with
Signs Your Boral Home Additions & ADU Is Failing
Most of what goes wrong with Boral-clad additions in Orlando isn’t the product failing on its own. It’s the installation decisions around it. Here’s what we see when we get called out:
- Trim pulling away from the wall at corners. This is almost always fastener failure: the wrong length screw, or the installer nailed trim into OSB instead of the framing behind it. Boral trim is dimensionally stable, so when it moves, the install moved first.
- Caulk cracking at trim-to-stucco joints within a year. That’s a tell for missing flashing or the wrong sealant. In Central Florida’s wet-dry cycle, caulk alone fails. The substrate, the moisture-resistant layer behind the visible surface, matters more than the caulk line.
- Water staining on interior drywall near windows or corners. By the time you see this, water has been traveling behind the cladding for months. The Boral product itself is fine. The integration detail failed.
- Swelling or soft spots in areas where Boral meets concrete. Boral trim should never sit directly on grade or in standing water. If it does, even rot-resistant products trap moisture and create a bridge for termites and mold.
- Faded or chalky paint within two seasons. Boral’s real advantage is paint retention. If it’s fading fast, the wrong topcoat was applied, or the surface wasn’t prepped per Boral’s spec. That’s a warranty claim with the installer, not the product.
See the difference
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AfterReplacement Cost & What’s Included
Home addition construction in Orlando runs $45,000 – $130,000 for a completed structure with Boral exterior products, depending on square footage, roofline complexity, and whether you’re adding a bathroom or kitchen. An ADU in a typical Orlando backyard runs $90,000 – $220,000 by the time site prep, utilities, and the structure are complete. If you’re only addressing a section of failing Boral trim or siding on an existing addition, that work typically falls between $3,000 and $15,000, depending on how much of the surrounding cladding has to come off to do it right.
What drives the number up or down: access (second-story work costs more), how much of the underlying framing or sheathing needs replacement once we open the wall, and whether the existing work can be salvaged or needs a full redo. Every quote we write includes the parts, labor, disposal, and the written guarantee, so the number on the proposal is the number on the final invoice. If we find damage behind the Boral after we open it up, we photograph it, explain it, and give you a written change before touching anything beyond the original scope. No surprise line items at the end.
DIY or Call Us?
Boral trim replacement on a one-story addition is something a careful homeowner with the right tools can handle on a small scale, like replacing a single water-damaged trim board. But once you’re into flashing details, multi-piece assemblies, or anything on a second story, the math changes. A bad caulk joint or a flashing detail done wrong means water intrusion you won’t see until it’s a $20,000 repair. We’ve pulled off Boral trim in Orlando that looked fine from the street and found the sheathing behind it gone from rot. The product did its job: everything behind it didn’t.
If you want us to look first, call (850) 427-6454. We’ll walk the addition, tell you what’s actually wrong, and give you the number before anyone picks up a tool. Give you the number first, then pick up the tool.
FAQs
With correct installation, Boral exterior products carry a 25-year substrate warranty, and in Central Florida conditions we see the products performing to that full span and beyond. The structure itself, built to current Florida code, has a service life of fifty years or more with normal maintenance. What shortens that life is water intrusion from bad flashing details, not product failure. Call (850) 427-6454 if you’re seeing early signs of trouble.
Small cosmetic issues like a cracked paint line or a loose corner on one board can often be repaired, yes. Once moisture has been getting behind the trim, repair stops being the right call. Roted sheathing spreads quietly, and in Orlando’s climate, it moves fast. The only way to know is to open a small section and look, which we’ll do during a free estimate.
A single-room addition typically takes 8 – 12 weeks from permit approval to final walkthrough. A detached ADU runs 14 – 20 weeks, with utilities and site work adding time. Permitting through the City of Orlando or Orange County adds 2 – 6 weeks on the front end, depending on scope and whether plans need revisions. We handle the permit drawings and inspections as part of the written scope.
We source Boral TrueExterior, Versetta Stone, and trim profiles through our Orlando supplier network and typically have common profiles available within a week. Specialty profiles or color-matched pieces may take 2 – 3 weeks. We handle the ordering, so you don’t have to sort through building supply yards. Call (850) 427-6454 and we’ll check availability for your specific product code.
Written by Trevor Nash, Owner, Penhallow Remodeling Orlando at Penhallow Remodeling Orlando, serving Orlando and nearby areas.
