● ActiveHVHZ approvedLast checked Oct 21, 2026
MFM Premium HT Tile & Metal Underlayment
Florida product approval and Miami-Dade NOA.
Check: Approved under tile, shingles, shakes and slate; tile may sit directly on it only up to 6:12 (battens above), stacks max 10 tiles, and max 180 days exposed. HVHZ approval is from the Miami-Dade NOA; FL11842 is the statewide (non-HVHZ) approval.
FL #FL11842-R9
Miami-Dade NOA24-0422.07
NOA expires06/27/2029In 32 months
Approval details
- Manufacturer
- MFM Building Products · 525 Orange Street, Coshocton, OH 43812
- Category
- Roofing · Underlayment · Self-adhered SBS
- Approved in HVHZ
- Yes
- Deck type
- Wood
- NOA approved
- 06/20/2024 · replaces NOA 20-0309.03
Official documents
PDFMiami-Dade NOA 24-0422.07miamidade.govPDFFL11842.4-R9 evaluation report 23-556-PHT-ER, MFM Premium HT Tile and Metal underlayment (non-HVHZ), 2023-08-02floridabuilding.org
Verify on floridabuilding.org ↗Quick answers
What is the FL number for MFM Premium HT Tile & Metal Underlayment?
FL11842 (HVHZ). The Miami-Dade NOA is 24-0422.07.
Is MFM Premium HT Tile & Metal Underlayment approved in the HVHZ?
Yes, on wood decks. The NOA expires 06/27/2029.
Public record. Always verify on the official source before you permit.