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Owens Corning Home Additions & ADU: The West Palm Beach Owner’s Guide
If you’re planning a home addition or ADU in West Palm Beach and want Owens Corning insulation, roofing underlayment, or sheathing products specified into the build, we can help. A typical home addition here runs $45,000 – $130,000, and an ADU runs $90,000 – $220,000 depending on square footage, foundation work, and how much of the Owens Corning product line you want us to install. Most owners reach out after discovering their existing space has failing insulation, moisture-damaged sheathing, or a roof underlayment that never should have been paired with South Florida humidity. Graham Stein walks every job site in West Palm Beach himself before pricing a single line item, because what’s behind the drywall in this climate tells you more than any blueprint.
Key Takeaways:
- We’re an independent West Palm Beach contractor, not affiliated with Owens Corning, but we specify and install their products by name and by model number.
- Written price before any work starts, every time. No estimates that grow after the crew arrives.
- The 365-Day Done Right Promise covers your addition or ADU after completion. If it’s not done right, we make it right.
- Drop cloths, shoe covers, quiet tools during nap hours, and pet-safe product choices are part of every job we run in West Palm Beach.
Which Owens Corning Models This Applies To
Owens Corning doesn’t make a single product called “home addition” or “ADU.” What they make are the material systems that determine whether your new square footage stays dry, cool, and structurally sound. In West Palm Beach, that means three lines matter most: Owens Corning FOAMULAR XPS rigid foam (we commonly spec the 250 and 400 series for slab and stem-wall insulation), Duration Series shingles with SureNail technology (the standard we recommend for ADU roofs given wind-driven rain off the Intracoastal), and ProPink fiberglass batts or blown-in AttiCat (for wall cavities and attic space).
The compatibility gotcha most homeowners miss: Owens Corning’s FOAMULAR XPS is not interchangeable with their Thermafiber mineral wool in high-moisture applications. The XPS is a vapor retarder; the mineral wool is vapor-permeable. Down here, using the wrong one against a block wall or behind stucco is how you get concealed condensation inside a brand-new bedroom. When we evaluate a West Palm Beach addition, we check what the existing structure was built with before we specify anything. That’s a materials decision you won’t see on a competitor’s estimate because most of them never ask.
The second gotcha: Owens Corning Duration shingles carry a different wind warranty rating than their Oakridge line. For an ADU with a roof under 6:12 pitch within a few miles of the coast, the Duration line is the only thing we’ll put on. We also stock KraftMaid, Cambria, and Silestone materials for the interior side of your addition, but when it comes to the Owens Corning envelope products, we order by exact model number and confirm the batch before it hits your driveway.
Styles & brands we work with
Signs Your Owens Corning Home Additions & ADU Is Failing
- Interior drywall feels warm or damp to the touch in the afternoon. This usually means the wall cavity insulation was compressed during installation, left with gaps at electrical boxes, or skipped entirely behind the tub. Owens Corning batts only perform at their rated R-value when they’re fluffed to fill the cavity, not stuffed.
- Your cooling bill climbed after the addition went in. In West Palm Beach, an unconditioned attic above a new bedroom will erase any efficiency gains from new windows. AttiCat blown-in insulation at the proper depth is the single best dollar-for-dollar fix we make on addition retrofits.
- Water stains at ceiling corners or along the top plate. This is rarely a leak in the shingles themselves. More often, the peel-and-stick underlayment was skipped on the eaves or around penetrations, and wind-driven rain is working its way beneath the shingle course.
- You can hear your neighbor’s pool pump through the shared wall. That means whoever framed the addition used fiberglass batts without a continuous air barrier. Owens Corning’s membrane products fix this, but the wall has to be opened to do it right.
- Mold or mildew smell in the closet that backs up to the garage. In West Palm Beach, the garage ceiling is the most commonly ignored insulation plane in the whole house. If it was left uninsulated or if the FOAMULAR board was installed with gaps, warm humid air from the garage condenses against the cool interior ceiling.
Replacement Cost & What’s Included
Here’s what you can expect to pay for Owens Corning product replacement work on an addition or ADU in West Palm Beach:
| Scope of Work | Typical Installed Price |
|---|---|
| Attic insulation removal and AttiCat re-blow (up to 1,200 sq ft) | $3,200 – $7,500 |
| Wall cavity re-insulation (open walls, ProPink batts) | $4,000 – $9,500 per room |
| FOAMULAR XPS rigid foam at slab edge / stem wall | $2,800 – $6,000 per 100 linear feet |
| Roof underlayment replacement with Owens Corning peel-and-stick | $2,200 – $5,500 per 1,000 sq ft |
| Duration Series shingle replacement on ADU roof | $8,000 – $14,000 for a 700 sq ft ADU |
| Full Owens Corning envelope on new addition | $14,000 – $32,000 added to the addition budget |
The range comes down to access, the condition of what’s already there, and whether your framing needs corrections before new materials go in. Every quote we write includes labor, materials by brand and model, and a firm start and end window. No change orders because we missed something on the first walkthrough. The work is covered by our 365-Day Done Right Promise, and the Owens Corning manufacturer warranty travels with the materials, so you can verify it independently.
See the difference
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AfterDIY or Call Us?
If you’re opening a small section of drywall to inspect what insulation is actually in the wall, that’s a reasonable weekend check. Turn off the breaker for that room, cut carefully with a utility knife, and tape a plastic sheet over the opening when you’re done. But the moment the scope includes anything structural, electrical, or above the roof deck, you need a licensed contractor. Attic blow-in covers can look easy and go sideways fast when you misjudge where the can lights are or accidentally block the soffit vents, which in West Palm Beach turns a hot attic into a mold incubator by September. And working on a roof in summer heat is not something any homeowner should attempt as a first project. Call (728) 203-3270 and we’ll send someone who knows what they’re looking at. The estimate is free, and it comes with a written scope before you commit to anything.
FAQs
Fiberglass batts and blown-in AttiCat will perform for 20 – 30 years if they stay dry and undisturbed. FOAMULAR XPS rigid foam lasts the life of the structure when installed correctly. The problem down here is rarely material failure; it’s installation failure or moisture intrusion that compromises the material early. Call (728) 203-3270 and we’ll tell you what’s actually in your walls before you spend money replacing it.
In a narrow sense, yes: if one section of a wall cavity has settled batts, we can open that section, fluff or replace the batts, and close it back up. But if the failure is moisture-related, any repair without addressing the source of the water is a temporary patch. That’s the thing we don’t gloss over on a West Palm Beach estimate; we’ll show you the damage and the cause before we quote a repair.
Most attic or single-room remediation jobs take one to three days once materials are on site. A full underlayment replacement on an ADU roof typically runs four to six days, depending on weather. We give you a written start and end window before the first tool leaves the truck, and we call if anything changes. Want a firm window for your project? Call (728) 203-3270 for a site visit.
We keep the most common ProPink batt sizes and a limited amount of FOAMULAR board on hand for immediate West Palm Beach service calls. Specialty products, like Duration Series shingles in a specific color or AttiCat in bulk, are ordered per job to match your existing materials and to ensure the product hasn’t been sitting in a warehouse rack for a year. We’ll tell you what’s stockable and what’s an order item before you decide anything.
No. That’s the whole point of the written price. Graham Stein walks the site before the estimate is written, so the number you approve is the number you pay. Put it in writing, then do exactly that. If we discover something unexpected behind the wall, we stop, show you, and price the fix separately before touching it. No surprises, no revised invoices, no “scope changed” conversations after the fact.
Call Elmstead Remodeling West Palm Beach
If your Owens Corning home addition or ADU in West Palm Beach has failing insulation, moisture-damaged sheathing, or a roof underlayment that’s not holding up to this climate, call (728) 203-3270 for a free estimate. You’ll get a written price, a real person on the phone, and a crew that put down drop cloths before they open a single wall. We’ve been completing additions, bathroom rebuilds, and full interior remodels throughout neighborhoods like Flamingo Park long enough to know what’s behind these walls before we open them. That’s the kind of specific knowledge that keeps a family from paying for the same fix twice.
Written by Graham Stein, Owner, Elmstead Remodeling West Palm Beach at Elmstead Remodeling West Palm Beach, serving West Palm Beach and nearby areas.
