Boral Underlayment & Deck Repair Nationwide

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

We stock and install Boral-compatible underlayment and deck repair materials across Fort Lauderdale, with most jobs running $1,400 to $3,800 depending on how much decking has to come out and what’s underneath it. The typical discovery goes like this: a tile cracks, or a ceiling stain spreads after a hard summer downpour, and the real problem turns out to be a failed section of underlayment or rotted deck sheathing below the tile. You don’t always need a full roof replacement, but you do need someone who understands how Boral tile beds fail in coastal Florida, because the repair approach is different here than it is inland.

Call (754) 732-9325

At Tilehurst Roofing Fort Lauderdale, we’re an independent roofing contractor. We are not affiliated with Boral, but we work with their tile and underlayment systems regularly and keep compatible materials on our trucks for Fort Lauderdale jobs.

Which Boral Models This Applies To

Boral manufactures concrete and clay roof tile under several series lines, including the Boral Concrete Tile line, Boral Clay Tile, and the newer Boral Roofing system components like MO40 and HT underlayments paired with their battens and flashings. The underlayment we replace is typically a Boral-recommended peel-and-stick or synthetic sheet, such as their Tiger Paw or similar high-temp rated product, and the deck repair is the plywood or OSB sheathing beneath it.

Here’s the compatibility gotcha we see in Fort Lauderdale: Boral’s newer tile profiles changed batten spacing and uplift clip requirements about a decade ago. The underlayment itself is fairly universal, but if the original install used a Boral-specific batten layout, we have to match that spacing or the tile won’t seat the same way. We check the tile profile stamped on the underside of a removed tile, or the job file left in the attic by the original roofer, before ordering anything. OEM Boral underlayment runs about $90 to $140 per 100 square feet; quality aftermarket equivalents like Polyglass or GAF WeatherWatch run $70 to $110 and perform comparably in our coastal climate, as long as they’re rated for high-temperature tile applications. For Fort Lauderdale’s heat, we typically recommend a high-temp synthetic underlayment over a standard asphalt-saturated felt, because the tile absorbs enough sun to cook cheaper felt in under ten years.

Signs Your Boral Underlayment & Deck Repair Is Failing

• Ceiling stains or interior drips after rain. Water has found a path through the underlayment, which means the deck below is getting wet. By the time you see a stain, the sheathing has usually been damp for months.
• Cracked or shifting roof tiles. A tile that flexes underfoot or cracks along a hairline fault usually means the deck or batten beneath it has softened. The tile isn’t the root cause; it’s a symptom of what’s underneath.
• Soft spots when walking the roof. If the roof feels spongy anywhere, the OSB or plywood deck has lost structural integrity. This is the most common repair we make on older Fort Lauderdale homes within a mile of the Intracoastal, where humidity accelerates deck rot.
• Granules or black streaks in gutters. Underlayment breaking down often shows up as fine asphalt particles washing off the roof edge. It means the membrane is past its useful life.
• Musty attic smell after rain. Water that gets past the underlayment but hasn’t breached the ceiling yet often evaporates into the attic, leaving a persistent damp smell. The deck is actively rotting even if you can’t see it from inside the house.

Replacement Cost & What’s Included

For Fort Lauderdale homes, Boral underlayment and deck repair typically lands between $1,400 and $3,800 installed. The spread depends on three things: how many sheets of decking need replacement (OSB runs $45 to $65 per 4×8 sheet installed, plywood $55 to $80), how much underlayment is required (usually $90 to $140 per square, installed), and how many tiles have to be pulled, cleaned, and reset. A small repair that doesn’t hit the deck might run $1,200; a larger section with rotted sheathing and tile reset climbs toward $3,800.

Every quote includes parts, labor, disposal, and a written price before any work starts, so there are no change orders at the door. Every repair is covered by a written guarantee, and if the repair fails inside the guarantee period, we return at no charge under the 365-Day Done Right Promise.

DIY or Call Us?

You can safely check a few things yourself: look for cracked tiles from the ground with binoculars, check the attic for damp spots after rain, and clear debris from roof valleys. That’s about it. Once you’re pulling tiles to inspect underlayment or decking, you’re on a roof that may already be structurally soft, which means a fall risk, and in Fort Lauderdale the summer heat makes tile roofs genuinely dangerous to walk without the right shoes and a harness.

What we see when owners try to repair this themselves is misdiagnosed deck rot: they’ll patch the underlayment, reset the tile, and six months later the same leak returns because the sheathing underneath was never replaced. If you suspect underlayment or deck failure, call (754) 732-9325 and we’ll walk the roof and give you a straight number before anything comes off.

FAQs