Tamko Underlayment & Deck Repair Nationwide

Tamko Underlayment & Deck Repair: The Jacksonville Owner’s Guide

We stock and install Tamko-compatible underlayment and deck repair materials throughout Jacksonville, with most residential fixes running between $450 and $1,400 installed depending on deck damage scope, underlayment square footage, and whether we’re patching or replacing. Our trucks carry common Tamko decking boards, clips, and underlayment rolls, so a lot of Jacksonville jobs are done in a single visit. Most homeowners discover the problem the hard way: a soft spot near a valley, water stains on the ceiling, or shingles that won’t lay flat because the deck beneath them has rotted. If your Tamko roof is failing at the underlayment or deck level, fixing it now costs less than the ceiling repair you’ll need later. This page tells you exactly what to expect, what it costs, and how we handle the disruption to your home. And if you have kids or a dog, you’ll want to read the part about how we keep the inside of your house clean while we work.

Call (904) 604-7914

Key takeaways:

• Tamko underlayment and deck repair in Jacksonville typically runs $450 to $1,400 installed.
• We’re an independent Jacksonville roofing contractor, not a Tamko affiliate, and we install Tamko-compatible materials daily.
• Florida humidity is the primary killer: decking rot under failed underlayment is the most common repair we see.
• You’ll have a written price in your hand before we touch a shingle.

Which Tamko Models This Applies To

We repair decks and underlayment under Tamko Heritage, Heritage Pro, Twin Rivers, and StormShield systems. The underlayment compatibility gotcha most Jacksonville homeowners miss: Tamko’s StormShield self-adhered membrane needs a clean, dry plywood or OSB deck that’s properly fastened, or the membrane won’t seal correctly at the laps. We check the deck fastening pattern before we roll anything out. If the deck has been there since before 2005, there’s a good chance it’s CDX plywood with inconsistent nail spacing, which is fine for organic felt but underperforms with modern synthetics. The aftermarket question comes up a lot. For decking, an APA-rated plywood or OSB rated for roof sheathing in the correct thickness is perfectly acceptable and frequently what we install. For underlayment, you want a synthetic or felt product rated for the same exposure window as the Tamko original. Where we won’t cut corners: peel-and-stick membranes in valleys and around penetrations. Buy once, buy the good stuff. It’s the difference between a 20-year roof and a 5-year ceiling stain.

Signs Your Tamko Underlayment & Deck Repair Is Failing

• Visible attic water staining or daylight through the deck. This means the underlayment has failed and moisture has reached the decking. The stain is the last symptom to show and the first sign you’re already behind on the repair.
• Soft or spongy deck areas when walked on. Rotted plywood or OSB loses structural strength long before it caves. A soft spot underfoot is advanced decay, and the deck needs sectioned replacement, not a patch.
• Shingles lifting, curling, or not laying flat. A healthy deck holds fasteners. When the deck swells from moisture or rots, nails back out, shingles shift, and you get the waffled look on the roof plane.
• Granule loss concentrated in one area. If one section of the roof is losing granules faster than the rest, the shingles there are moving against each other. That movement almost always traces back to the deck, not the shingle.
• Musty smell in attic or ceilings after rain. The underlayment’s job is to shed water that gets past the shingles. When it’s torn, saturated, or improperly lapped, water gets to the deck and the smell follows.

Replacement Cost & What’s Included

In Jacksonville, most Tamko underlayment and deck repair jobs we do land between $450 and $1,400 installed. A small deck patch with new synthetic underlayment and two bundles of matching shingles sits at the low end. A full roof-plane deck replacement with peel-and-stick underlayment in valleys, new drip edge, and re-shingling runs toward the top of that range or slightly beyond if the home has a steep pitch or multiple levels. The spread comes down to deck square footage, whether rafter tails need sistering, and how much tear-off time the crew needs. Every quote includes materials, labor, disposal, and the clean-up. You’ll see the exact number in writing before we start, and that number doesn’t move on you. The work itself is covered by our 365-Day Done Right Promise: if it’s not right, we make it right. Erik Lindgren grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College, and after two decades on real roofs in real weather, he’s particular about deck fastening, lap direction, and water flow. That particularity keeps your ceiling dry.

DIY or Call Us?

If you want to know whether you have a problem, you can safely check a few things: look in the attic with a flashlight after a hard rain, step only on the trusses if you must go up, and watch for damp insulation or staining. That’s where DIY should end. Deck and underlayment repair means stripping shingles, cutting out rotted sheathing, reinstalling new decking, and re-laying underlayment and shingles in the correct pattern. Do it wrong and you get a leak you can’t see until it’s inside your kitchen ceiling. If the dog needs to stay inside during the work, we coordinate the door schedule with you. We use pet-safe products where there’s a choice, and we lay drop cloths through the hallway so the house doesn’t look like a job site when we leave. Before the crew goes home, you get a photo of the completed clean-up. If you want to know if it’s a repair or a replace, call (904) 604-7914 and we’ll walk the roof with you. You’ll have the price in writing before we touch a shingle.

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