Metal Roof Panels and Compatible Underlayment Systems
MRM Tornado Underlayment — the deck-side half of a factory-paired roofing system.
We custom-form every panel to your roof's exact measurements. The underlayment underneath gets the same attention: a purpose-built layer, not a generic felt roll grabbed off a shelf.
A Factory-Paired System, Not a Mix-and-Match Roof
Standing seam
Pairs with the radiant-barrier side of the underlayment lineup.
Corrugated & shingle profiles
Pairs with the duo-barrier and cap-sheet options.
Match Your Panel Profile to an Underlayment
Pick the underlayment that pairs with the panel profile you've already chosen.
MRM Tornado Radiant Barrier SWR 5000 FR
The pairing we most often recommend under standing seam.
MRM Tornado Radiant Barrier SWR 2000 FR
A lighter reflective option for smaller or simpler panel jobs.
MRM Tornado Duo Barrier 1500 HT
Works well under corrugated and metal shingle profiles.
MRM Tornado White SBS Cap Sheet 4000 FR
A mineral-coated option for stone-coated steel and tile-look panels.
Fire Rating Built Into the System
Class A fire-rated as part of a tested roof assembly, quoted in the same package as your custom-formed panel.
Backup Protection Under a Custom Fit
A self-adhered secondary barrier under every custom length we form.
Reflective Companion to Your Panel Finish
The radiant-barrier face works with your panel's own heat-reflective coating.
Sealed at the Deck
The self-adhesive membrane bonds to the deck before the panel goes down and helps seal around the fasteners driven through it.
Quieter Under Every Profile
Sound dampening whether you've chosen standing seam, shingle or corrugated.
Panel and Underlayment, Engineered Together
Underlayment goes down on the deck first; the custom-formed panel goes on top of it. Paired system approval means the two are engineered and tested to work together, not matched up after the fact.
What's Certified in This Pairing
The panel-and-underlayment pairing carries the following, together:
- Miami-Dade County Approved
- Class A Fire Resistance
- Meets or exceeds ASTM D1970
- Standard 20-Year Limited Warranty on the underlayment
- Manufactured in the USA
- Paired system approval with MRM Tornado Steel & Aluminum Roof Panels (FL-approved)
Need Specs for a Specific Pairing?
Tell us which panel profile you're considering and we'll follow up with the technical details for the matching underlayment.
From Measurement to Matched System
Measure the roof
Exact dimensions for both the panel run and the deck below it.
Form the panel
Custom lengths, cut to spec in our Florida facility.
Roll out the underlayment
The matched Tornado product goes down first.
Install the panel on top
Completing the paired system as approved.
Request Panel & Underlayment Specs
Get pricing on the matched system, not just the panel.