Boral Underlayment & Deck Repair Nationwide

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

Boral underlayment and roof deck repair in Fort Lauderdale typically runs $1,200 to $4,800 installed, depending on how much decking has rotted and which Boral-compatible underlayment your roof needs. We stock Boral-compatible underlayment and deck materials on our trucks, so most repairs in the Fort Lauderdale area are completed same-day once we’re on site. Most homeowners discover the problem the way you just did: a leak shows up on the ceiling after a heavy South Florida downpour, or a roofer points out soft spots during an inspection. The underlayment is the waterproof layer between your roof deck and your shingles or tile. When it fails, water gets to the plywood deck underneath, and that’s when the real damage starts.

Call (754) 354-1224

Here’s the thing about Boral roofs in South Florida: the tile or shingle on top can look perfectly fine while the underlayment underneath is quietly failing. That’s not a defect in the product. Boral makes solid materials. It’s our climate. Fort Lauderdale gets roughly 60 inches of rain a year, and that water sits on roofs longer than it does in drier parts of the country. Heat cycles in the high 80s and 90s bake the underlayment from above while humidity works on the deck from below. Eventually, something gives. Usually it’s the underlayment seams first.

We’re an independent roofing contractor in Fort Lauderdale, not a Boral company. We work with Boral products regularly because plenty of homes throughout Broward County have them, and we know how they behave in this climate.

Which Boral Models This Applies To

Boral doesn’t sell one universal underlayment. Over the years, Broward County roofs have been built with several Boral product lines, and the right replacement depends on what’s already up there. The most common we see on Fort Lauderdale homes are Boral’s tile roofing systems paired with either a peel-and-stick modified bitumen underlayment or a synthetic underlayment, depending on when the roof was installed. Homes roofed in the early 2000s often have Boral’s older felt-based underlayment, which frankly doesn’t hold up as well in South Florida humidity as the newer synthetics do.

The gotcha with Boral tile roofs is that the underlayment spec isn’t interchangeable with what you’d use under asphalt shingles. Boral tiles are heavier and hold more heat, so the underlayment underneath has to be rated for high-temperature exposure. If someone slaps a standard 30-pound felt under a Boral tile roof in Fort Lauderdale, it’ll bake out and crack years before it should. We match the underlayment to the tile type and the roof pitch, not just to whatever’s cheapest at the supply house. If your roof has original Boral paperwork, the underlayment spec is usually listed. If not, we identify it by pulling a tile, measuring the existing underlayment thickness, and checking for manufacturer markings on the underside.

As for deck repair, what matters is whether the plywood or OSB decking has delaminated from moisture. We don’t patch over rotted decking. That’s a five-year band-aid at best. We cut out the bad section, replace it with the same thickness as the original deck, re-secure it to the trusses or rafters, and then re-apply the underlayment above it. The repair is only as good as the deck underneath, and in Fort Lauderdale’s humidity, skimping there means you’ll be calling us again after the next hurricane season.

Signs Your Boral Underlayment & Deck Repair Is Failing

• Water stains on ceilings or walls, especially after heavy rain. This is the classic first warning. A ceiling stain means water has already made it through the tile or shingle, through the underlayment, and is pooling on the deck. By the time paint bubbles, the deck underneath is usually wet too. Don’t wait on this one in Fort Lauderdale: our afternoon thunderstorms will keep feeding the leak every single day.
• Damp or musty attic smell after rain. If your attic smells like a wet towel that never dried, the underlayment is likely letting moisture through in small amounts even when you don’t see a stain yet. That’s the South Florida signature: high humidity means slow leaks show up as smell before they show up as stains.
• Soft spots or visible sagging in the roof deck when viewed from the attic. Wet plywood or OSB loses its structural integrity faster than most people realize. If you can see a dip between rafters, or if the deck feels spongy underfoot during an inspection, the deck has been wet long enough to need replacement, not just drying.
• Cracked, curling, or lifted tiles near roof penetrations. On Boral tile roofs, the areas around vents, pipes, and skylights fail first. The flashing at these penetrations works with the underlayment to keep water out. When one fails, the other gets overloaded. Lifted tiles near a pipe boot in Fort Lauderdale usually mean the underlayment underneath has been taking water for a while.
• Granules from underlayment or tile fragments in gutters after storms. If you’re finding sandy grit or small tile chips in your gutters after a heavy rain, water is moving where it shouldn’t be. That grit has to come from somewhere, and in a Boral system, it usually means the underlayment or the tile surface is breaking down. Check the downspout outlets first after the next hard rain; it’s a two-minute check that tells you a lot.

Replacement Cost & What’s Included

In Fort Lauderdale, Boral underlayment replacement on a standard repair section runs $1,200 to $3,200 installed. If the deck underneath needs to be cut out and replaced, add $800 to $3,600 depending on how many sheets of plywood or OSB are involved and whether we’re working on a simple slope or sections with multiple valleys and penetrations. The range exists because no two Fort Lauderdale roofs have the same layout: a simple two-story colonial off Sunrise Boulevard is a different job than a split-level with skylights in Victoria Park.

Every quote includes the parts, labor, disposal of old materials, and re-securing surrounding tiles or shingles that had to be lifted to do the work. We write the price down before we start, and that’s the price you pay unless we uncover something you specifically approve. No surprise line items at the end. Every Boral underlayment and deck repair we do carries our 365-Day Done Right Promise: if the repair isn’t right within a year, we come back and make it right at no charge.

DIY or Call Us?

Let’s be straight about this one. Some roof repairs are reasonable for a handy homeowner. Boral underlayment replacement is not one of them. The underlayment sits under hundreds of pounds of tile or shingles, and pulling those without breaking them takes the right tools and a lot of practice. A broken Boral tile in 2026 costs more to individually source than you’d guess, and a homeowner who drops a tile off a Fort Lauderdale roof is now paying for roof repair plus whatever that tile landed on. The bigger issue is safety: working on any South Florida roof means dealing with heat, pitch, and often wet surfaces. It’s not a ladder-and-hammer Saturday project.

What you can safely do is a visual check from the ground or from inside your attic. Look for the warning signs above. If you see water, call us at (754) 354-1224. We’ll send someone out to look, put the findings and the price in writing, and go from there. You don’t have to decide anything on the spot.

How Much Does Boral Underlayment & Deck Repair Cost in Fort Lauderdale?

FAQs

Call Mercer Roofing Co Fort Lauderdale for Boral Underlayment & Deck Repair

If your Boral roof is showing signs of underlayment or deck failure, don’t wait through another South Florida rainy season. Call (754) 354-1224 for a free estimate. A live person answers, day or night. We’ll schedule a visit, send you the technician’s name and photo before they arrive, and when they knock on your door, they’ll be in a clean Mercer uniform with a photo ID badge you can check against what we sent. Written price first. Written guarantee on every repair. That’s how we work in Fort Lauderdale. A good roof shouldn’t be something you think about, that means we did our job right.

Written by Grant Whitlock, Owner, Mercer Roofing Co Fort Lauderdale at Mercer Roofing Co Fort Lauderdale, serving Fort Lauderdale and nearby areas.