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Boral Home Additions & ADU: The Fort Lauderdale Owner’s Guide
If you’re planning a Boral home addition or ADU in Fort Lauderdale, you’re looking at an installed range of $45,000 to $130,000 for an addition, and $90,000 to $220,000 for a detached ADU. We stock and install Boral-compatible framing, trim, and siding systems, and we can usually have a project scoped, priced, and permitted within two to three weeks of your first call. Most owners reach out after their existing structure shows signs of water intrusion around window openings, cracked stucco at wall junctions, or a failed tie-in where the new roofline meets the old one.
Sawyer Remodel Fort Lauderdale is an independent general contractor. We are not affiliated with Boral, but we work with their product lines daily and know which components hold up in South Florida’s humidity and which ones don’t.
Which Boral Models This Applies To
Boral’s home addition and ADU product ecosystem breaks into three groups that matter in Fort Lauderdale: TruExterior siding and trim, Boral roofing tiles (concrete and clay), and their framing-adjacent sheathing products. Compatibility depends on what your original builder used and when. TruExterior comes in 16-foot lengths with a 5/4 thickness profile, which differs from James Hardie’s 12-foot, 7/16-inch standard. If your addition was framed with 24-inch on-center studs, you need the 5/4 TruExterior, not the thinner Hardie profile.
For Boral roof tile on additions, the gotcha is weight. Concrete Boral tile runs roughly 600 to 1,000 pounds per square (100 square feet). An existing Fort Lauderdale home framed for asphalt shingles will not carry that load without structural reinforcement. We check the original truss engineering before quoting any tile-roof addition. On the OEM-versus-aftermarket question: for Boral trim and siding, we use genuine Boral product because the poly-ash formula resists moisture differently than wood-composite lookalikes. For roof tile, we stock several profiles including flat shake and barrel mission style, and we can match discontinued colors through regional distributors in Broward County.
Styles & brands we work with
Signs Your Boral Home Additions & ADU Is Failing
- Water staining around window and door trim on the addition. This usually means the flashing behind the TruExterior trim was never installed with the proper overlap, or the original installer used standard nails instead of stainless. In Fort Lauderdale’s salt air, non-stainless fasteners rust out in five to seven years.
- Cracking at the seam where new wall meets old wall. Different materials expand at different rates. A Boral siding addition tied to an older CBS (concrete block) wall without an expansion joint will crack, every time. The fix is cutting a clean joint and installing the proper backer rod and sealant, not caulking over the crack.
- Sagging or uneven roofline at the tie-in point. The addition’s roof structure was either under-built or the connection to the original trusses was done without an engineer’s letter. You’ll see this as a visible dip when you stand at the street and sight down the ridge line.
- Mold or mildew on interior drywall near the floor on exterior walls. In Fort Lauderdale’s wet season, this points to a failed moisture barrier behind the Boral siding or improper weep screed at the base of the wall. Water is getting in, sitting, and growing things.
- Doors on the addition stick seasonally. The poly-ash trim is stable, but the underlying framing may be moving. If the addition sits on a slab that wasn’t poured with proper vapor barrier, ground moisture swells framing and the doors bind in summer months.
See the difference
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AfterReplacement Cost & What’s Included
For a full Boral home addition in Fort Lauderdale, the honest installed range is $45,000 to $130,000. A detached ADU runs $90,000 to $220,000 depending on finish level. What drives the spread: square footage, roof tile weight and whether reinforcement is needed, how much of the existing wall needs to be opened for the tie-in, and the finish package you choose. A garage conversion on an existing slab sits lower, at $30,000 to $80,000, because the foundation and three walls already exist.
Every quote from us includes a written line-item price before any work starts. That price covers materials, labor, permit fees, dumpster, and the engineering letter if structural changes are needed. We don’t do change orders unless you change the scope. The number on your invoice is the number you approved, and it’s backed by our 365-Day Done Right Promise: if it’s not done right, we make it right, in writing.
DIY or Call Us?
You can check some things yourself. Walk the addition’s exterior after a heavy Fort Lauderdale rain and look for water stains at window corners. Sight along the roofline for dips. Test doors for seasonal sticking. These observations help you describe the problem when you call.
What you should not do is attempt structural work, roof tie-ins, or any Boral tile installation yourself. Roof tile work means walking on a roof, handling 600 to 1,000 pounds per square, and getting the underlayment details right so your insurance claim doesn’t get denied later. Concrete tile on a roof that wasn’t engineered for it is a structural failure waiting to happen. The work either holds up or it doesn’t – we make sure it does. Call (754) 354-7423 and we’ll come out, assess the addition, and give you a written price. The estimate is free.
FAQs
A properly installed Boral addition lasts 40 to 50 years for the structural shell, with trim and siding hitting 30-plus years before needing replacement. Boral concrete roof tile can go 50 years or more. The weak points in Fort Lauderdale are always the same: flashing, fasteners, and sealant joints. Those fail in 10 to 15 years if installed with the wrong materials. Call (754) 354-7423 to have us inspect yours, and we’ll tell you what’s actually failing before you spend money on guesses.
Yes, if the framing is sound and the failure is limited to flashing, sealant, or isolated trim boards, we can repair it for a fraction of full replacement cost. If the issue is structural, like roof sag from an under-built tie-in, you need an engineer’s assessment before any repair makes sense. We’ll give you an honest read on which situation you’re in, with a written price either way.
Plan on four to eight weeks for a garage conversion, three to six months for a full ground-up addition, and four to eight months for a detached ADU. The permitting timeline in Fort Lauderdale runs two weeks to two months depending on whether you’re in a historic district or flood zone. We handle the permit package and inspections, and you’ll get photo updates before and after each phase, so you’re never guessing what happened on the job that week.
We maintain stock of common TruExterior trim profiles, sealant, flashing, and fasteners at our Fort Lauderdale shop. For roof tile, siding, and specialty profiles, we order from regional Boral distributors, usually two to five business days out. If you need us to match a discontinued Boral tile color, we can source through our Broward County suppliers. If you have questions about the other brands we work with, like KraftMaid cabinets, Cambria countertops, or Silestone surfaces for the interior of your addition, just ask.
If you’re planning a Boral addition or ADU in Fort Lauderdale, the next step is a conversation. Call (754) 354-7423 and we’ll talk through your project, answer the tough questions about cost and timeline, and get a written estimate scheduled. No pressure, no vague numbers. Just a price in writing and a crew that shows up when we say we will.
Written by Luca Romano, Owner & Lead Contractor, Sawyer Remodel Fort Lauderdale at Sawyer Remodel Fort Lauderdale, serving Fort Lauderdale and nearby areas.
