Your Tile Roof Might Look Perfect. Here's What It Isn't Telling You.
If you own a tile roof in Rapid City, you probably chose it for its beauty and durability. Those clay or concrete tiles can outlast almost any other roofing material, and they give your home character that asphalt shingles never will.
But there’s a hidden part of your roof that doesn’t last nearly as long as the tiles on top. If your roof is 15 years old or more, it may be time to look underneath.
What Is a Tile Roof, Exactly?
A tile roof uses individual pieces of clay or concrete, laid in overlapping rows, to shed water and protect your home. Clay tiles are the classic terracotta look you see on Spanish and Mediterranean homes. Concrete tiles are more common here in the Black Hills.
Both are known for their longevity. Many tiles are rated to last 50 years or more, and they resist fire, rot, and insects.
Here’s what many homeowners don’t realize: the tiles aren’t your roof’s main waterproofing layer. They’re the armor. The real waterproof barrier sits directly beneath them, and it’s called the underlayment.
Your Second Layer of Protection: Your Underlayment
Underlayment is a membrane installed over your roof deck, under the tiles. Tile roofs are designed to let a small amount of water slip between the tiles, especially during wind-driven rain or melting snow. The underlayment catches that water and channels it safely off the roof.
Depending on the material used, underlayment typically lasts somewhere between 15 and 30 years. That means your underlayment will likely wear out long before your tiles do. Older felt-based underlayments, common in many existing homes, are often at the shorter end of that range.
Why 15 Years Is the Magic Number
Once your tile roof reaches the 15-year mark, the underlayment has already spent a long time working through heat, cold, and moisture. Over time, it can dry out, crack, tear, or wear through, especially around valleys, vents, and chimneys.
In the Black Hills, our weather makes that aging process tougher. Your roof faces:
- Freeze-thaw cycles that expand and contract roofing materials through the winter
- Intense summer sun at our elevation, which bakes the layers beneath your tiles
- Hail and heavy storms that can crack tiles and expose the underlayment to direct weather
- Snow load and ice dams that push meltwater underneath tiles
The tricky part is that a failing underlayment is invisible from the ground. Your tiles can look flawless while water quietly seeps into your roof deck. By the time you see a stain on your ceiling, the damage may already include rotted decking, soaked insulation, or mold.
An inspection at 15 years gives you a clear picture while there’s still time to plan instead of panic.
What Happens If Your Underlayment Needs Replacing?
Replacing underlayment on a tile roof isn’t like replacing a shingle roof. Tiles are heavy, can be brittle, and are often expensive or difficult to match. The process looks like this:
- Each tile is carefully removed, sorted, and stored.
- The old underlayment is stripped, and the roof deck is inspected and repaired.
- New, modern underlayment is installed.
- Your original tiles are reinstalled, with damaged pieces replaced by matching tiles.
Done right, your home gets a fresh waterproof barrier and keeps the tiles you love. Done wrong, you’re left with cracked tiles, mismatched replacements, and leaks. This is a job where experience matters.
Why Rapid City Homeowners Trust Weather-Tite With Tile Roofs
At Weather-Tite Exteriors, tile roofing is part of what we do best. Our crews have years of hands-on experience removing, salvaging, and reinstalling tile roofs across the Black Hills. We know how to handle concrete tiles with care, minimize breakage, and source matching replacements when needed.
We understand how our local climate affects tile roofs, and we build every project to withstand Rapid City’s hail, snow, and sun.
When you call us, you’ll get a thorough inspection, an honest assessment, and a clear explanation of your options. If your underlayment still has life left, we’ll tell you. If it’s time for replacement, we’ll walk you through every step.
Don’t Wait for an Unexpected Leak
Your tile roof is an investment designed to protect your home for decades. Protecting that investment means caring for what’s underneath. We will give you an honest recommendation and peace of mind.