Owens Corning Underlayment & Deck Repair Nationwide

Owens Corning Underlayment & Deck Repair: The Fort Lauderdale Owner’s Guide

We stock and install Owens Corning-compatible underlayment and roof deck repair materials throughout Fort Lauderdale, with most underlayment replacement jobs running $1,800 to $4,200 installed depending on roof size, pitch, and how much decking needs to come up. Same-week scheduling is typical for us, and we carry Deck Defense and RhinoRoof underlayment on our trucks along with CDX plywood and OSB decking rated for South Florida wind loads. Most homeowners discover the problem after a leak shows up on the ceiling, or when a roofer peels back shingles during an inspection and finds the underlayment has turned brittle and cracked.

Call (754) 354-1224

We’re an independent roofing contractor, not affiliated with Owens Corning, but we install and repair their roofing systems in Fort Lauderdale regularly, and we know exactly how their underlayment behaves after a decade of Broward County humidity.

Which Owens Corning Models This Applies To

If your Fort Lauderdale home has Owens Corning shingles installed in the last 20 years, you likely have one of two underlayment products beneath them: Deck Defense, their synthetic underlayment, or RhinoRoof, their older felt-based product. Deck Defense is the one we see most often on homes with Duration or Oakridge shingles, and it’s the product that handles Fort Lauderdale’s wet season best when installed correctly.

The compatibility gotcha most owners miss: Deck Defense is rated for specific exposure windows. If a crew leaves it uncovered for more than 90 days before shingles go on, Owens Corning’s warranty on the underlayment itself is void. We’ve seen homes near Victoria Park and Rio Vista where underlayment sat exposed through a rainy stretch, and the material degraded before the shingles ever went down. When we do a deck repair, we verify what’s actually under the shingles before quoting, because the fix differs depending on whether it’s synthetic, felt, or a peel-and-stick product like WeatherLock. For most Fort Lauderdale homes, we recommend Deck Defense synthetic over #30 felt, because it holds up better in high humidity and doesn’t absorb moisture the way felt does after a storm cycle.

Signs Your Owens Corning Underlayment & Deck Repair Is Failing

• Water stains on ceilings or walls after heavy rain. This usually means water is getting past the shingles and the underlayment below has a breach. In Fort Lauderdale, where afternoon thunderstorms arrive fast and hard, we see this most often on north-facing roof slopes that hold moisture longer.
• Granules in your gutters after every storm. Shingle granule loss alone doesn’t mean underlayment failure, but it often signals the shingles are at end of life, and whatever is beneath them is the only thing left keeping water out.
• Soft spots when walking the roof deck. We find these during inspections in older Fort Lauderdale neighborhoods like Sailboat Bend and Tarpon River, where plywood from the 1980s and 1990s has rotted along the edges. Water got through the underlayment years ago and has been eating the decking since.
• Visible wrinkling or lifting at the roof edges. Underlayment that was never properly fastened or was exposed too long will ripple under the shingles. On low-slope sections common on Fort Lauderdale ranch homes, that ripple becomes a channel for wind-driven rain.
• Mold or musty odor in the attic. Underlayment that’s trapping moisture instead of shedding it creates ideal conditions for mold along the underside of the decking. We’ve opened up decks in Coral Ridge and found entire sheets of plywood covered in black growth, all because underlayment failed silently years earlier.

Replacement Cost & What’s Included

For Fort Lauderdale homes, here’s what underlayment and deck repair typically costs, installed:

• Underlayment replacement only (small section, 200 – 400 sq ft): $900 – $1,800
• Full roof underlayment replacement (1,500 – 2,500 sq ft home): $1,800 – $4,200
• Decking repair (replace rotted plywood or OSB, per 4×8 sheet): $75 – $110 per sheet, plus labor
• Full roof deck replacement on older Fort Lauderdale homes: $4,500 – $8,500 depending on access and pitch

What drives the price is roof steepness, how many sheets of decking need replacing, and whether we need to remove and re-set tile or shingles. Every job gets a written line-item price before we start, and every underlayment or deck repair carries our 365-Day Done Right Promise: if it’s not right within a year, we make it right, and if a repair fails, the second visit is free. That’s in writing, every time.

DIY or Call Us?

You can safely do the diagnostic part yourself: check for water stains on ceilings, look in the attic for dark streaks on plywood, and check gutters after a storm for granule buildup. That tells you something is wrong but not what’s wrong. Underlayment and deck repair means pulling up shingles or tile, exposing the deck, cutting out rotted material, and re-fastening everything in the right sequence. Getting it wrong doesn’t just mean another leak; it means a deck that won’t pass inspection when you sell the house. Working on a roof in Fort Lauderdale also means working at height on surfaces that get slick with humidity. That’s the point where you want a trained crew with the right fasteners, the right underlayment spec, and the right insurance. Call (754) 354-1224 and we’ll send a technician whose name and photo you’ll have before they ever pull into your driveway.

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