Tamko Underlayment & Deck Repair Nationwide

Tamko Underlayment & Deck Repair: The West Palm Beach Owner’s Guide

If your Tamko roof is leaking, lifting, or showing soft spots, the underlayment and decking beneath the shingles are usually where the problem starts. We stock Tamko-compatible underlayment and repair decking on our trucks and install it throughout West Palm Beach, with most underlayment and deck repairs running between $850 and $2,400 depending on how much decking has rotted and how many squares of underlayment need to come off. The typical call starts with a water stain on a ceiling or a shingle that’s started to curl at the edge, and what we find underneath is the real story.

Call (728) 203-3066

Here’s what matters: in West Palm Beach, your underlayment is doing more work than your shingles. It’s the waterproof barrier that keeps wind-driven rain out of your attic when a summer storm hits from the east. If it’s torn, wrinkled, or installed over decking that’s already spongy, the roof fails from the inside out. We’ve pulled back Tamko shingles in Northwood Hills that looked fine from the street and found decking you could push a screwdriver through. That’s not a bad shingle. That’s a barrier that stopped doing its job years ago.

Key Takeaways:

• Tamko underlayment and deck repair in West Palm Beach typically costs $850 – $2,400 installed, depending on square footage and decking condition.
• We stock Tamko-compatible synthetic underlayment and OSB/plywood decking for same-week replacement on most jobs.
• Your underlayment is the roof’s actual waterproof layer; if it fails, new shingles won’t save you.
• Brennan Roofing Co West Palm Beach is an independent roofing contractor. We install Tamko materials but are not affiliated with Tamko Building Products.

Which Tamko Models This Applies To

Tamko’s underlayment and decking requirements are consistent across their asphalt shingle lines here in Florida, including Heritage, Heritage Premium, Elite Glass-Seal, and StormShield. The compatibility question is less about the shingle model and more about what’s under it. Tamko specifies a minimum 15-pound asphalt-saturated felt or a synthetic equivalent for most of their residential shingle systems, but Florida code and Tamko’s own high-wind installation guides for coastal counties push toward synthetic underlayment with higher tear strength. In West Palm Beach, we’re in a high-wind zone, so we default to Tamko’s synthetic underlayment options or a code-compliant equivalent that carries a comparable or better warranty position.

The decking side is more straightforward: you’re either working with 1/2-inch or 5/8-inch plywood, or OSB rated for roof sheathing. The gotcha we see often is older West Palm Beach homes built before the 1990s that used 3/8-inch plywood or spaced board sheathing. If a roof has spaced boards, modern underlayment and shingles won’t lay flat, and the deck needs to be re-sheeted before any Tamko product goes on. If you’re unsure what’s under your shingles, pull the attic access and look up. If you can see daylight between boards, that’s a re-sheet, not a patch job.

How to identify what you have: check the edge of a lifted shingle for a printed underlayment label, or ask us to inspect it. Most Tamko underlayment products are printed with the Tamko name and product grade (like Tamko Diamond Deck or Tamko TW Metal and Tile). If it’s not printed, the thickness and tear resistance tell us whether it meets the minimum for a Tamko shingle warranty. We’ll write down exactly what we find and what we recommend, with the price for both the OEM Tamko product and a quality aftermarket synthetic. You decide, and the decision goes on paper before any work starts.

Signs Your Tamko Underlayment & Deck Repair Is Failing

Underlayment and decking fail quietly. The shingles on top can look fine while the structure beneath them is done. Here’s what to watch for:

• Ceiling stains that appear hours after rain, not during it. This is classic underlayment failure. Water moves slowly through the decking and pools on the underlayment before it finds a seam or nail hole. By the time it reaches the ceiling, the source is feet away from the stain.
• Soft or bouncy spots on the roof. Decking rot is structural. If a roofer walks your roof and the plywood feels spongy or deflected, that’s a full section of decking replacement, not a patch. We flag it, photograph it, and show you the board before we cut it out.
• Shingle tabs lifting across entire courses, even in light wind. Shingles bond to the underlayment and decking as a system. If the underlayment has wrinkled or the decking is moving, the shingle’s self-seal strip loses contact and the whole course loosens.
• Granule loss concentrated in certain areas, sometimes with exposed fiberglass mat. Heat from a poorly ventilated attic cooks the underlayment from below, which in turn bakes the shingle from above. The shingle fails first, but the underlayment is getting cooked too.
• Visible rust or water marks around nails in the attic. This means water is getting through the shingle and sitting on the underlayment long enough to travel along the fastener. The fastener is now a water path. Underlayment replacement is the fix, not caulk.

Replacement Cost & What’s Included

Here’s what we charge in West Palm Beach, in dollars, before you have to decide anything:

• Underlayment-only replacement (localized, up to 2 squares): $850 – $1,400 installed.
• Underlayment replacement with partial decking repair (2 – 4 sheets of plywood or OSB): $1,400 – $2,100 installed.
• Full re-deck of a small roof plus underlayment: $1,800 – $2,400 installed, depending on square footage and whether we’re reusing the existing Tamko shingles or installing new.

What drives the range: how much decking is rotted, how steep the roof is, how many layers of old roofing need to come off, and whether we can re-use the Tamko shingles you have or need to replace them. Parts are line-itemed, labor is line-itemed, and the number on the paper is the number you pay. We don’t come back to the door with a change order because we found “unexpected” decking rot. We expect it. That’s what the inspection is for.

Every repair and replacement we do carries the 365-Day Done Right Promise: it’s in writing, it’s good for one full year, and if it fails within that year we come back at no charge. That’s the Garrison Standard, and it applies to every Tamko underlayment and deck job we do in West Palm Beach.

DIY or Call Us?

There’s an honest split here. You can check your attic for daylight between deck boards, water stains, or rusted nail points. You can check your ceilings for new stains. You can look at your roof from the ground and note any obvious shingle lifting. What you shouldn’t do is get on a roof in West Palm Beach and start pulling shingles. A roof with failing decking is a fall risk for anyone, and a homeowner without a safety harness and proper footwear on a 6/12 pitch is one wrong step from an ambulance ride. Decking repair is structural work, and underlayment that’s installed wrong voids your Tamko shingle warranty and your insurance coverage.

If you want a professional assessment, call (728) 203-3066. Travis Oakley or one of our background-checked, uniformed technicians will inspect it, write down what we find, and give you a price on paper before any work starts. You’ll know exactly who’s on your roof and exactly what it costs.

FAQs

Get Your Free Estimate

If you suspect your Tamko underlayment or decking is failing, don’t wait for the next storm to confirm it. Call (728) 203-3066 to schedule a free estimate. We’ll show up on time, in uniform, background-checked. We’ll inspect your roof, write down what we find, and put the price on paper before any work starts. A roof done right doesn’t ask for your attention until it’s time for a new one. Yours is asking now, so let’s get it answered.

Written by Travis Oakley, Owner, Brennan Roofing Co West Palm Beach at Brennan Roofing Co West Palm Beach, serving West Palm Beach and nearby areas.