Rectangle Roofing | Naples, FL

We got called out to a home in Naples last week for what the homeowner thought was a gutter problem. Water staining on the soffit, running down the exterior wall near the eave. From the ground, it looked like the gutters were leaking.

We got up there and the gutters were actually fine.

The real problem was coming from above. The underlayment under the tiles had failed. And unless you know what to look for, you'd never know it was happening.

What is roof underlayment and why does it matter?

Your tile roof has two main layers. The tiles on top are what you see from the street. They handle sun, rain, and wind. But underneath those tiles, there's a waterproof membrane called the underlayment. That's the layer that actually keeps water out of your home.

Think of it this way: the tiles are the umbrella, but the underlayment is the raincoat. If the raincoat has holes in it, you're getting wet no matter how nice the umbrella looks.

Most tile roofs built in Southwest Florida in the early 2000s used felt underlayment. It was standard at the time. But felt underlayment was only designed to last about 15 to 20 years. Today, we install much thicker peel-and-stick membranes that hold up significantly longer. But if your home was built in 2000 to 2006, your original felt underlayment is either at the end of its useful life or past it.

And here's the thing. Your tiles can look perfect from the driveway while the underlayment underneath is completely shot.

What does tile roof underlayment failure look like?

The homeowner we visited had no idea there was a problem. She lives out of state. The roof looked fine from the street. But when we got into the attic, we found five separate leak points where water was getting through at the valleys and eaves.

Valleys are where two roof planes meet and funnel water into a concentrated stream. Eaves are the low edges where water rolls off. These are the highest water-flow areas on your roof, and they're where underlayment wears out first.

Here's what we found inside the attic:

• Rotted plywood decking where water had been sitting
• Mold growth on the wood framing
• Cracked decking in one section
• Water staining and damage on the rafters

From the outside, the only clue was some discoloration on the soffit boards and water tracking down the exterior wall. Most homeowners would assume that's a gutter problem. It wasn't.

How to tell if your tile roof underlayment is failing

You don't need to get on your roof to spot the warning signs. Here are a few things you can check from the ground:

Water stains on your soffit boards. If you see discoloration or cracking on the underside of your eaves, especially if it's located behind the gutter line, water is likely coming from above, not from the gutters.

Dark streaks on exterior walls below the eave. Water running down your wall from the roofline is a sign that something above the gutter is leaking.

Visible dipping in the tile courses. If you look at your roof from the street and the rows of tile aren't sitting flat, the plywood decking underneath may have lost rigidity from water damage.

No roof permits on file. If your home was built before 2005 and there's no record of a roof permit, that means the original underlayment is still in place. At 20+ years old, it's past its designed lifespan.

If you notice any of these signs, it's worth having someone get into your attic to take a look. The tiles might be fine. But what's underneath them tells the real story.

Why you can't just patch it

Florida Building Code has what's called the 25% rule. If roof repairs exceed 25% of the roof area within a 12-month period, the entire roof section has to be brought up to current code. And for homes built before March 2009, there's no partial repair exemption.

What that means in practice: if your underlayment has failed at multiple valleys and eaves across the roof, the repair work required to fix all of those areas would likely exceed that 25% threshold. At that point, the code requires a full roof replacement, not a patch job.

This isn't a scare tactic. It's how the building code works in Florida. And it exists because partial repairs on a failing system don't solve the underlying problem. They just delay it.

What a tile roof replacement actually involves

A full tile re-roof in Southwest Florida typically includes removing all existing tiles, old underlayment, and flashing. Then inspecting and replacing any rotted plywood decking. Installing new peel-and-stick underlayment over the entire roof deck. Installing new concrete or clay tiles with foam-set adhesive. New drip edge, flashing, pipe boots, ridge and hip tiles. And a Collier County or Lee County roofing permit and inspections.

The entire process usually takes about 5 to 8 weeks from contract signing to final inspection, with the actual installation taking about 1 to 2 weeks depending on the roof size.

How much does a tile roof replacement cost in Naples?

Tile re-roof pricing in Southwest Florida typically runs between $1,000 and $1,500 per square (a square is 100 square feet of roof area). For a typical single-story home with 30 to 50 squares of roof area, that puts the total somewhere between $30,000 and $75,000 depending on the size of the home, the tile profile selected, and the condition of the decking underneath.

The biggest variables in cost are the amount of rotted decking that needs to be replaced and the tile profile you choose. Concrete S-barrel profiles like the Eagle Capistrano are a proven, high-quality system that most roofers in SWFL trust for durability and wind resistance. Premium clay tiles or custom profiles will push the price higher from there.

What to do if your tile roof is 20+ years old

If your home was built in the early 2000s with a concrete tile roof and nobody has been up there since, it's worth getting an inspection. Not a sales pitch. An actual inspection where someone gets into your attic and looks at the underside of your decking.

A lot of homes in Naples, Bonita Springs, Fort Myers, and Cape Coral were all built around the same time with the same tile roofing systems. The tiles age well. But the underlayment underneath them doesn't.

The sooner you catch it, the less damage you're dealing with when it's time to replace.

Rectangle Roofing is a licensed Florida roofing contractor (CCC1337049) serving Naples, Fort Myers, Cape Coral, and Southwest Florida. We specialize in tile roof inspections and replacements. If you have questions about your roof or want to schedule a free inspection, call us at (239) 206-6916 or visit rectangleroofing.com.