Homeowners pick the tile, shingle or metal they can see. The part that actually keeps water out in a hurricane is the underlayment underneath. If wind breaks tiles or tears off shingles, a well-installed self-adhered underlayment is what stands between the storm and your ceiling. That's why we use Polyglass Polystick® underlayments matched to each roof type.
Polystick® TU Plus for tile roofs
A self-adhered underlayment made for tile roofs. It bonds directly to the roof deck and is designed to work with tile adhesive and tile installation. We use it under concrete tile and clay tile.
Polystick® MTS Plus for metal, tile and shingle
A self-adhered underlayment rated for metal, tile and shingle roofs, including the high temperatures under a metal roof in the Florida sun. We use it under standing seam metal and shingle roofs.
Why self-adhered
- Sticks directly to the deck, so wind-driven rain can't get under it.
- Seals around nails that pass through it.
- Acts as a secondary water barrier if the roof covering is damaged in a storm, which also matters for insurance wind-mitigation credits.
Why underlayment is where old roofs fail
On many 20- to 30-year-old tile roofs, the tile still looks fine while the underlayment beneath has dried out and cracked. That's when leaks start. A new roof with a premium self-adhered underlayment resets that clock. Roof leaking after heavy rain? →
Approved for South Florida code
In Miami-Dade and Broward (the High-Velocity Hurricane Zone), every roofing product must carry a current Miami-Dade Notice of Acceptance (NOA) and be installed exactly to it; elsewhere in Florida it needs Florida Product Approval. We confirm the current approval for your address before we order, install to it, and include it with your permit. What NOAs and the HVHZ mean →
TU Plus flyer (PDF) MTS Plus details
Why have Big Al's install it
- Owner-run since 2015; Big Al walks the roof and writes a line-item proposal with the exact product and color.
- GAF Certified contractor and Florida certified roofing contractor #CCC1330874.
- Permits pulled and every inspection scheduled; 10-year labor warranty.
- 4.8 stars from 81 Google reviews. Read reviews →
We bring samples and color charts to your estimate. Get an instant roof quote or call (305) 900-8297.
FAQ
What is a secondary water barrier?
A layer under the roof covering that keeps water out if wind damages or removes the tile, shingles or metal. A sealed, self-adhered underlayment serves this purpose and can help with insurance wind-mitigation credits.
Which Polyglass underlayment do you use under tile?
Polystick TU Plus, which is made for tile roofs.
Which do you use under metal?
Polystick MTS Plus, which is rated for metal roofs and the high temperatures under them.
Can I just replace the underlayment and reuse my tiles?
Sometimes, if the tiles are in good condition and still available to match. We'll tell you honestly after inspecting.
Other products we install
GAF Timberline HDZ shingles · Westlake Royal concrete tile · Englert A1300 standing seam · All products & brochures