Owens Corning Underlayment & Deck Repair Nationwide

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

We stock and install Owens Corning-compatible underlayment and deck repair materials across Miami, with most underlayment replacements on asphalt-shingle roofs running between $550 and $1,200 depending on square footage and how much decking needs to be replaced. Deck repair adds roughly $3 to $5 per square foot when sections of plywood or OSB have rotted through. Most Miami homeowners discover the problem the hard way: a ceiling stain after a heavy afternoon storm, or a roofer peeling back shingles and finding the underlayment has turned to crumbling felt and the deck underneath feels soft as a sponge. If you’re seeing water where it shouldn’t be, the part that failed is almost never the shingle. It’s what’s underneath.

Call (850) 613-1762

We’re an independent roofing contractor in Miami, not affiliated with Owens Corning, but we work with their full product line plus materials from GAF, CertainTeed, IKO, Atlas, Tamko, and Boral. That matters when your deck repair needs a specific underlayment spec to pass Miami-Dade code.

Key Takeaways

• Owens Corning underlayment replacement in Miami typically runs $550 to $1,200 installed; deck repairs add $3 to $5 per square foot.
• Underlayment fails in Miami faster than almost anywhere in the country because of heat, humidity, and hurricane-driven rain.
• We stock Owens Corning Deck Defense, RhinoRoof, and ProArmor synthetic underlayment on our trucks, plus standard #30 felt for budget repairs.
• Every job gets a written price before any work starts, and a written guarantee before the crew leaves.
• Call (850) 613-1762 for a free estimate. A live person answers, 24/7.

Which Owens Corning Models This Applies To

Owens Corning makes three underlayment products you’ll find on Miami roofs: ProArmor synthetic, Deck Defense synthetic, and RhinoRoof synthetic. They also still sell standard asphalt-saturated felt under the Owens Corning name, though we see less of it on newer homes because Miami-Dade code pushes builders toward synthetics for their tear resistance and water holdout.

The compatibility gotcha most homeowners don’t know: ProArmor and Deck Defense are not interchangeable with peel-and-stick self-adhered membranes like Owens Corning’s WeatherLock. If your roof has WeatherLock in the valleys or eaves, swapping it for a generic synthetic creates a weak point where wind-driven rain gets underneath. We match whatever was originally installed unless there’s a documented failure pattern that justifies an upgrade. Greg Holloway, our owner, has seen too many Coral Gables barrel-tile homes where a previous roofer mixed systems and the underlayment failed within two seasons.

Identifying your current underlayment usually means looking at exposed edges in the attic or at the eave line. Synthetic underlayment feels like a woven plastic tarp with printed branding every few feet. Felt looks like thick paper. If you can’t access those areas, we’ll identify it during the free inspection and write the exact product name on your estimate, not just “underlayment.”

Signs Your Owens Corning Underlayment & Deck Repair Is Failing

• Water stains on ceilings after normal rain. If stains appear after a standard Miami afternoon shower, not just hurricane conditions, the underlayment has likely lost its water-holding ability and water is traveling through to the deck. This means the shingles alone are doing the waterproofing, which they were never designed to do.
• Granules from shingles collecting in gutters. When Owens Corning shingles shed excessive granules, it usually means the deck underneath is flexing or the underlayment has deteriorated enough that heat is baking the shingles from below. Granule loss accelerates once the underlayment goes.
• Soft spots or spongy feel when walking the roof. If the roof feels like it gives underfoot, the decking has absorbed moisture and the plywood or OSB is delaminating. In Miami’s humidity, once decking reaches that point it never dries out. It gets replaced, not repaired.
• Visible underlayment in the attic that’s torn, brittle, or stained. Grab a flashlight and look up. If the underlayment between the rafters and shingle deck looks cracked, sagging, or has dark water stains running across it, the failsafe layer that catches what shingles miss is already compromised.
• Mold or mildew smell in the attic after rain. That smell means water is getting in somewhere and sitting. In Miami’s climate, trapped moisture turns to mold within weeks, and mold means the deck and underlayment both need attention before the framing itself starts rotting.

Replacement Cost & What’s Included

Here’s the real pricing picture for Miami, based on what we quote week in and week out:

The range exists because no two Miami roofs have the same damage. A home in Kendall with minor deck rot around a plumbing vent costs less than a home in Coconut Grove where twenty years of tree canopy trapped moisture against the deck. What’s included every time: the written quote before any work starts, the specific product names and quantities, labor, disposal of old material, and a written guarantee delivered before the crew leaves. If the repair fails inside the guarantee period, Tilehurst Roofing Miami returns at no charge under the 365-Day Done Right Promise. Know the price before we touch the roof, that’s the only way we know how to work.

DIY or Call Us?

Underlayment and deck repair is not a weekend project. If you get it wrong, you’ve just spent money to make your roof worse, and Miami’s next storm will prove it. What you can safely do: get into the attic with a flashlight and document what you see. Take photos of stains, sagging, or visible underlayment damage. Check your ceiling for water marks after rain. That information helps us quote accurately over the phone.

What you shouldn’t do: peel back shingles to inspect underneath. Once shingles are lifted and not properly re-sealed, they become wind-driven rain entry points. We arrive with a written price and our own inspection equipment, and we stand behind the work, not just the product. Call (850) 613-1762 to schedule a free inspection. We’ll tell you honestly whether you need underlayment replacement, deck repair, or both, and what it’ll cost before anything gets scheduled.

FAQs

Call Tilehurst Roofing Miami for Your Free Estimate

If your Owens Corning underlayment or deck repair has been put off long enough, or if you’ve got water where it shouldn’t be, call us at (850) 613-1762. A live person answers, 24 hours a day, 7 days a week, including evenings and weekends. We’ll schedule your free inspection, put a written price in your hands before any work starts, and deliver a written guarantee before the crew leaves. That’s the Tilehurst way, and it’s how Greg Holloway has run every job he’s ever been on.

Written by Greg Holloway, Owner, Tilehurst Roofing Miami at Tilehurst Roofing Miami, serving Miami and nearby areas.