● ActiveHVHZ approvedLast checked Oct 21, 2026

GAF FT Synthetics Underlayments & Leak Barriers

Florida product approval and Miami-Dade NOA.

Check: Not for recover over an existing membrane; tile is not an approved cover for systems E(1), E(2) and F(1); Silver/UDL 90 max 30 days exposed, others 180 days.

FL #FL20853-R6

Miami-Dade NOA26-0728.04

NOA expires04/21/2031In 54 months

Approval details

Manufacturer: GAF · 1 Campus Drive, Parsippany, NJ 07054
Category: Roofing · Underlayment · Synthetic polypropylene and self-adhered rubberized asphalt
Approved in HVHZ: Yes
Deck type: Wood
NOA approved: 09/10/2026 · replaces NOA Revises NOA 24-0502.16

Official documents

PDFMiami-Dade NOA 26-0728.04miamidade.gov PDFFL20853-R6 file on floridabuilding.org, Intertek CCRR-1028 for FT Synthetics underlayments (names Silver and Platinum; 2023 FBC incl. HVHZ)floridabuilding.org

Verify on floridabuilding.org ↗

Products this NOA lists

FT Synthetics Silver (aka FT Performance UDL 90) · FT Synthetics Platinum (aka FT Premier UDL 180) · FT Synthetics Platinum HT-B (aka FT Premier Butyl Leak Barrier) · FT Synthetics Platinum HT-SA (aka FT Performance SA Leak Barrier) · FT Specialty FR Leak Barrier · FT Specialty Tile Leak Barrier

Quick answers

What is the FL number for GAF FT Synthetics Underlayments & Leak Barriers?

FL20853 (HVHZ). The Miami-Dade NOA is 26-0728.04.

Is GAF FT Synthetics Underlayments & Leak Barriers approved in the HVHZ?

Yes, on wood decks. The NOA expires 04/21/2031.

Public record. Always verify on the official source before you permit.