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Owens Corning Home Additions & ADU: The Fort Lauderdale Owner’s Guide
If you’re planning a home addition or ADU in Fort Lauderdale using Owens Corning materials, the typical installed project runs $45,000 – $130,000 depending on square footage, foundation work, and finishes. Mason Remodeling Co Fort Lauderdale works with Owens Corning roofing, insulation, and structural sheathing on additions and ADUs throughout Fort Lauderdale, and we can usually begin your estimate within a few days of your call. Most Fort Lauderdale homeowners discover they need this work when they outgrow the existing footprint, take in extended family, or realize that adding square footage beats paying Fort Lauderdale’s current move-up prices.
A quick note before we go further: Mason Remodeling Co Fort Lauderdale is an independent general contractor. We specify and install Owens Corning products, but we’re not affiliated with the Owens Corning corporation. What that means for you is we can recommend the right Owens Corning product for your Fort Lauderdale addition without a brand quota behind our advice, and we’ll stand behind the work with a written guarantee that lasts 365 days from completion.
Which Owens Corning Models This Applies To
When Fort Lauderdale homeowners ask us about “Owens Corning home additions,” they’re usually referring to the materials package that goes into the addition, not a single Owens Corning product line. The most common Owens Corning products we specify on Fort Lauderdale additions and ADUs are Duration and Oakridge shingles, FOAMULAR XPS rigid insulation, and Thermafiber mineral wool. For ADU roof decks and underlayment, we pair Owens Corning shingles with their Deck Defense or RhinoRoof synthetic underlayment because Fort Lauderdale’s humidity and afternoon thunderstorms punish cheaper underlayments fast.
Here’s the compatibility gotcha we see on Fort Lauderdale retrofit additions: if your existing main house has an older Owens Corning shingle line like Prominence or Classic that’s been discontinued, you won’t match the color exactly with a new Duration shingle. We tell homeowners this before they buy materials, and we bring physical shingle samples to your Fort Lauderdale home so you can see the color difference in daylight. It’s a small thing, but on a $45,000+ addition, a roof color mismatch is the kind of regret people notice every time they pull into the driveway.
In terms of OEM versus aftermarket for Owens Corning materials: we specify genuine Owens Corning roofing and insulation products on every Fort Lauderdale addition. For fasteners, flashing, and underlayment, we use manufacturer-approved equivalents from brands like GAF and CertainTeed when the spec allows. There’s no savings in buying a knockoff roofing underlayment in Fort Lauderdale’s climate. The cheap stuff fails in three to five years, and then you’re paying for a roof repair on top of an addition you just built.
Styles & brands we work with
Signs Your Owens Corning Home Additions & ADU Is Failing
Most Fort Lauderdale homeowners don’t think about an addition “failing” until they see water, feel heat, or hear something they shouldn’t. Here’s what we see most often:
- Water staining on the ceiling near the addition’s roofline. This usually means the Owens Corning underlayment or flashing detail wasn’t installed correctly where the new roof ties into the existing roof. Fort Lauderdale’s summer downpours find every gap within minutes.
- Second-floor or ADU space won’t hold temperature. Older foam insulation or missing Owens Corning Thermafiber batts in wall cavities let heat pour through by 10 a.m. In Fort Lauderdale’s wet season, this can also mean moisture is getting into the insulation cavity, which leads to mold behind the drywall.
- Visible gaps or sagging at the roofline where the addition meets the main house. This is a structural warning sign, not a cosmetic one. Fort Lauderdale’s high winds work on that joint over time, and a sagging roofline means the connection detail is failing.
- Curling or lifting shingles on the addition’s roof within the first five years. Owens Corning shingles are designed for Florida sun, but poor attic ventilation on a Fort Lauderdale ADU can cook the shingles from the underside and void the manufacturer’s material warranty.
- Higher electric bills that started right after the addition was finished. This points to insulation gaps or an undersized HVAC run. We regularly find additions in Fort Lauderdale neighborhoods like Victoria Park where the original builder skipped Owens Corning FOAMULAR on exterior walls to save a few hundred dollars, and the homeowner pays for it every month.
Isaac Pruett has spent enough time inside Fort Lauderdale additions to know that most failures are installation problems, not product problems. Owens Corning makes a good shingle and a good insulation board. What fails first is usually the detail: the tie-in, the flashing, the ventilation, the waterproofing where Fort Lauderdale humidity and rain meet your new square footage.
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AfterReplacement Cost & What’s Included
For a full home addition or ADU in Fort Lauderdale using Owens Corning materials, plan on $45,000 – $130,000 all-in. The range depends mostly on square footage, whether you’re building on a slab or over a crawl space, and how much we’re tying into existing systems. A smaller add-on of 300 to 400 square feet with a simple bathroom lands near the low end. A full attached ADU with a kitchen, a proper roofline, impact-rated windows, and Owens Corning insulation throughout lands at the high end.
What’s included in our Fort Lauderdale pricing: written line-item pricing before we start, the Owens Corning materials specified for your project, permits pulled and inspections passed, and a workmanship warranty of 365 days from completion. We don’t hand you a number on a handshake and then “discover” costs later. Isaac Pruett’s signature line on every Fort Lauderdale job is the same: we tell you what we found, what it takes to fix it, and what it will cost – before we touch a thing.
DIY or Call Us?
Here’s the honest split. There’s nothing about a home addition or ADU in Fort Lauderdale that we would call safe DIY. Not the framing, not the roofing, not running new electrical or plumbing. The Fort Lauderdale building department will not permit unlicensed structural work, and for good reason: an addition that’s tied into your house incorrectly can pull the existing structure apart in a hurricane, or trap moisture in the walls until the mold problem becomes a health problem. If your Owens Corning addition is leaking or underperforming, the safest thing you can do yourself is call us and describe what you see. We’ll ask questions, give you a straight answer about the likely cause, and schedule a look.
What you can do safely: check your attic access for visible water staining, look for shingle granules in your gutters, and note whether the addition’s doors and windows still close squarely. Those details help us find the problem faster. But leave the roof, the tie-in, and the structural inspection to a contractor who’s done this in Fort Lauderdale for years. Call (754) 354-3720 and we’ll come out, look at what’s happening, and give you a written price for the fix.
FAQs
A properly built Fort Lauderdale addition using Owens Corning roofing and insulation should last 30 to 50 years on the structural shell, with a roof replacement at the 15- to 20-year mark depending on sun exposure and ventilation. The materials are not the weak point; the installation details and attic ventilation are what determine whether your Fort Lauderdale addition makes it to 30 years or starts showing problems at year 8.
In most cases, yes. If the failure is at the roofline tie-in, flashing, or insulation, we can correct it without tearing the whole addition down. What we need to determine first is whether the structural connection is sound. If it is, repairs are straightforward. Call (754) 354-3720 and we’ll give you an honest assessment of what needs to come apart and what can stay.
A full addition or ADU in Fort Lauderdale takes 8 to 16 weeks from first permit to final inspection, depending on scope and how quickly the city approves the plans. Smaller repairs to a failing addition, like re-flashing a roofline or adding Owens Corning insulation, can often be done in one to three days once materials arrive.
We keep common Owens Corning underlayment, flashing, fasteners, and foam board in our Fort Lauderdale stock, and we order full Owens Corning shingle and insulation packages per project so you get the correct series and color for your addition. We also work with KraftMaid, Cambria, and Silestone for interior finishes on ADUs and additions, so you can specify cabinetry and countertops at the same time we’re quoting the build. Call (754) 354-3720 for an exact quote on your Fort Lauderdale addition or ADU, estimates are free and the price is in writing before we start.
Written by Isaac Pruett, Owner, Mason Remodeling Co Fort Lauderdale at Mason Remodeling Co Fort Lauderdale, serving Fort Lauderdale and nearby areas.
