IKO Underlayment & Deck Repair Nationwide

IKO Underlayment & Deck Repair: The Dallas Owner’s Guide

IKO underlayment and deck repair in Dallas typically runs $400 to $1,800 installed, depending on whether we’re patching a section of rotten decking or re-underlaying an entire roof plane before shingles go back on. We keep IKO Armourskin and StormShield rolls on the truck, and we’re usually on-site within 48 hours of your call. Most Dallas homeowners discover the problem the hard way: a leak shows up on the ceiling after a spring storm, and when we pull back the shingles, the underlayment underneath looks like dry, cracked parchment that’s stopped doing its job.

Call (903) 499-4275

Which IKO Models This Applies To

IKO underlayment pairs with every asphalt shingle in their lineup: Dynasty, Cambridge, Nordic, Royal Estate, and Marathon all install over IKO’s own synthetic underlayments, and the warranty paperwork assumes the system is used together. The compatibility gotcha most Dallas owners hit is with modified bitumen and peel-and-stick products: IKO StormShield is the self-adhering ice-and-water barrier meant for eaves, valleys, and low-slope sections, while Armourskin is the breathable synthetic that belongs everywhere else. Swapping them because they’re both “underlayment” voids the IKO warranty and traps moisture exactly where you don’t want it. We can identify the existing underlayment by its printed pattern and thickness in minutes. As an independent service provider, Tilehurst Roofing Dallas isn’t affiliated with IKO directly, but we install their material systems daily and keep genuine IKO rolls alongside quality equivalents, so if a particular film line is backordered we can still move forward without hacking the spec.

Signs Your IKO Underlayment & Deck Repair Is Failing

• Dark ceiling stains that spread after rain. This is the classic symptom, and it means water has already worked through the shingles, the underlayment, and the decking. The stain you see is the last stop in a leak that’s been running for weeks.
• Soft, spongy attic decking. Walkable sections of roof decking that flex underfoot mean the plywood or OSB has been absorbing moisture. In Dallas, our summer heat accelerates rot once it starts, so squishy decking today becomes a tear-out by November.
• Granules in the gutters and a film of dark grit on the underlayment. IKO shingles shed granules as they age, and once the granule layer thins, the asphalt underneath cooks in the Texas sun. The underlayment below it dries out and cracks, losing its backup waterproofing role.
• Wrinkled or brittle underlayment visible at the roof edge. Synthetic underlayment should lie flat and flexible. If it’s rippled, cracking, or flaking at the drip edge, it’s reached the end of its service life and won’t recover.
• Mold or mildew smell in the attic after heavy rain. That odor means standing moisture somewhere in the decking or insulation. It’s not something that airs out and goes away; it’s evidence that the underlayment barrier has already failed at some point above it.

Replacement Cost & What’s Included

In Dallas, replacing IKO underlayment and decking runs $400 to $800 for a small deck patch with new underlayment, $800 to $1,500 for a full slope underlayment replacement, and $1,500 to $1,800 when we’re re-decking larger sections and installing fresh IKO StormShield at the eaves. The two biggest drivers are how many sheets of decking are rotted through and how much underlayment square footage has to come up. Parts run $40 to $90 per sheet of decking and $70 to $120 per roll of IKO synthetic underlayment; labor is the rest. You get a written line-item price before we start, so there’s no number that changes at the door, and every repair comes with our 365-Day Done Right Promise in writing. If the repair fails inside that year, Greg Holloway’s crew comes back at no charge.

DIY or Call Us?

What you can safely do: get into the attic on a dry day and look for daylight pinholes in the decking, water staining around roof penetrations, and the feel of the decking from underneath. Those observations give us a head start. What you shouldn’t do: peel back shingles from a ladder to inspect underlayment yourself. That’s the part of the job where gravity and a stripped nail strip meet, and it’s a long fall. Underlayment replacement also has to be sequenced right, new rolls overlapped in the correct direction and secured to code, or you’ll build a leak into a roof that didn’t have one. We’d rather you call (903) 499-4275, send us photos from the attic, and then let us walk the roof and hand you a written price. That’s the faster and safer route, and it’s free.

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