Self-adhered underlayment engineered to pair with MRM’s metal roofing systems — fire resistance, radiant heat reflection, sound dampening, and a secondary water barrier, manufactured in Miami, FL.
Fire Rating
Protection
Roll Options
Manufactured
The highest fire-resistance rating for a roof underlayment.
Reflects radiant heat, reducing heat transfer into the building.
Dampens rain and hail noise on a metal roof.
Self-adhered layer that protects the deck if the panel above is compromised.
Self-sealing around fasteners; guards against water and ice at eaves, valleys, and penetrations.
MRM Tornado Underlayment installs directly beneath the metal roof panel and over the plywood deck — completing the roofing envelope alongside MRM’s coil, panel, and roll-forming machinery lines. Manufactured in Miami, FL, it pairs with MRM Tornado Steel & Aluminum panel systems for a single-source, manufacturer-backed roof assembly.
Four rolls built for different parts of the Tornado roofing system. Thickness and roll length vary by SKU — specify the roll you need per project.
| Product | Width | Thickness | Roll Length | Face | Back |
|---|---|---|---|---|---|
| MRM Tornado Radiant Barrier SWR 5000 FR | 100 cm | 3 mm | 10 m | Aluminum foil radiant | Removable film |
| MRM Tornado Radiant Barrier SWR 2000 FR | 100 cm | 2 mm | 20 m | Aluminum foil radiant | Removable film |
| MRM Tornado Duo Barrier 1500 HT | 100 cm | 1.5 mm | 20 m | Removable film non-foil | Removable film |
| MRM Tornado White SBS Cap Sheet 4000 FR | 100 cm | 3.3 mm | 10 m | Mineral-coated white | Removable film |
As part of the Tornado roof assembly.
Made and shipped from Miami, FL.
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