Look up an FM Approved roofing assembly and its wind-uplift rating in RoofNav
domain: roofnav.fmapprovals.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Create a free RoofNav account at roofnav.fmapprovals.com (registration required for full assembly search)
Use the Product/Assembly Search tab to filter by manufacturer, roof cover category (e.g., 'TPO,' 'EPDM,' 'built-up'), and subcategory
Configure the specific assembly (deck type, insulation, attachment, cover) using RoofNav's Advanced Configuration Modeling, which will only allow FM-tested/compatible combinations
Confirm the resulting Class 1 wind-uplift rating (e.g., 1-90, 1-120) and cross-reference it against the project's required design pressure from ASCE 7/IBC
Generate and save the RoofNav Contractor Package PDF documenting the exact assembly configuration for the project submittal file
Known gotchas
RoofNav ratings apply only to the exact configuration modeled (deck, insulation, fastener pattern, attachment) — substituting one component invalidates the rating even if all components are individually FM Approved
FM 1-XX ratings (pounds per square foot) are not directly interchangeable with ASCE 7 zone design pressures without proper safety-factor conversion; consult FM Global Data Sheet 1-28 for how to translate ASCE 7 pressures to a required FM rating
RoofNav underwent a major platform refresh (new version released 2024) — bookmarked/legacy assembly numbers from older RoofNav printouts may not resolve directly; re-search by product/manufacturer if a saved link fails
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