IKO Underlayment & Deck Repair Nationwide

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

IKO underlayment and roof deck repair in Fort Lauderdale typically costs between $400 and $1,800 installed, depending on how much decking has rotted and how many squares of underlayment need replacing. We stock IKO-compatible underlayment on our trucks and can usually match your existing IKO system the same day we inspect it. Most homeowners discover the problem after a leak shows up on the ceiling, or when a roofer lifts a section of shingles and finds the decking underneath has turned soft from years of South Florida humidity.

Call (754) 732-9325

Here’s the reality of Fort Lauderdale roofs: your underlayment is doing more work than the shingles. Between the summer downpours, the salt air off the Atlantic, and the relentless UV, the waterproof layer under your IKO shingles takes a beating every single day. When it fails, the decking follows close behind. Greg Holloway has walked hundreds of these roofs, and the pattern is always the same: a small leak gets ignored, the plywood or OSB soaks it up, and what started as a $400 underlayment repair becomes a $1,800 deck replacement. We tell you the price before we touch your roof. That’s just how it should work.

Which IKO Models This Applies To

This page covers underlayment and deck repair for the full IKO residential line: Cambridge, Dynasty, Nordic, Marathon, and Royal Estate shingle systems, plus IKO’s flat-roof and low-slope membranes commonly found on Fort Lauderdale homes along the Las Olas Isles and in neighborhoods like Rio Vista and Coral Ridge. The underlayment spec depends on your roof’s slope and the IKO system originally installed. IKO’s own underlayment products, like their synthetic Armourbase line and their standard asphalt-saturated felt options, come in different weights and roll sizes, and matching the original spec matters for your IKO warranty documentation.

Here’s the compatibility gotcha most homeowners don’t know: IKO’s warranty language requires the underlayment to meet or exceed the spec listed for your specific shingle line. If a previous contractor installed a bargain felt under a Dynasty shingle roof, the shingle warranty may already be compromised, even though the shingles themselves look fine. We verify the underlayment type during the inspection and match it accordingly. We install genuine IKO underlayment when the job calls for it, and we also carry quality equivalents from GAF, Owens Corning, and CertainTeed that meet or beat IKO’s published specs. The decision comes down to your warranty status, your roof’s age, and your budget, and we walk you through it before any work starts.

Signs Your IKO Underlayment & Deck Repair Is Failing

• Water stains on ceilings or walls after heavy rain. This means the underlayment has already been breached and water is traveling between the underlayment and the decking. By the time you see the stain, the leak has usually been active for weeks.
• Soft or spongy spots when walking the roof. Fort Lauderdale’s humidity means a small leak rarely dries out on its own. The decking absorbs the moisture, the plywood or OSB delaminates, and the surface loses its rigidity. This is a deck replacement, not a patch.
• Granule loss that exposes the underlayment’s felt or synthetic backing. IKO shingles shed granules as they age, and once the asphalt layer thins out, the underlayment becomes the only waterproof barrier left. If you can see black felt or white synthetic material between shingle courses, the underlayment is at the end of its service life.
• Bubbling or blistering visible from the attic side. Moisture trapped between shingles and decking expands in the Florida heat, creating pockets where the underlayment has failed. This is common on Fort Lauderdale roofs where attic ventilation was never properly balanced.
• Curling or lifting shingles that expose the underlayment to direct sunlight. UV breaks down asphalt underlayment surprisingly fast once it’s exposed. In our climate, an unprotected section of underlayment can lose its waterproofing within six months of direct sun.

Replacement Cost & What’s Included

These ranges include tear-off of the affected area, disposal, new underlayment, new decking where needed, and re-installation of the existing shingles when they’re salvageable. The price moves based on how much decking is rotted, whether the roof is single-story or two-story, and whether your IKO shingles can be reused or need replacing in the affected area. Every Tilehurst Roofing Fort Lauderdale job comes with a written price before any work starts, and every repair is covered by a written guarantee, delivered before the crew leaves your driveway. If the repair fails inside the guarantee period, we return at no charge under the 365-Day Done Right Promise.

DIY or Call Us?

There’s a safe middle ground here. From the ground or a ladder, you can look for missing shingles, visible underlayment, or water stains on ceilings and exterior walls. You can check your attic after a heavy rain and look for wet spots on the underside of the decking. That’s useful information for the inspection.

What we don’t recommend is lifting shingles yourself or walking a roof with suspected deck damage. A soft deck can give way under your weight, and Fort Lauderdale’s afternoon storms arrive fast. A roof that’s slippery from algae or morning dew is not where you want to be without proper equipment. And honestly, most DIY underlayment patches fail within a year because the overlap isn’t right or the fasteners aren’t seated to spec. If you’re not sure what you’re looking at, call us at (754) 732-9325. Greg walks every roof himself, gives you a straight number, and we don’t start work until you’ve seen the written price.

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