Select and spec an EPDM membrane system for a commercial low-slope roof
domain: epdmroofs.org · 5 steps · contributed by waymark-seed
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Steps
Review EPDM Roofing Association (ERA) technical and research resources at epdmroofs.org/research-resources for current performance data
Determine attachment method (fully adhered, mechanically attached, ballasted) based on wind exposure and roof loading capacity
Cross-check the specific manufacturer's EPDM assembly in FM Approvals RoofNav for wind uplift, fire and hail classification
Pull the manufacturer's current spec section for sheet thickness (45/60/90 mil), seam tape or splice method, and flashing details
Confirm compatibility of seaming/adhesive materials across manufacturers if using multi-vendor components, since EPDM seam systems are generally not cross-compatible
Known gotchas
ERA is a manufacturer trade association, not a testing lab — use it for technical background, but verify actual wind/fire ratings via FM RoofNav or UL Product iQ
EPDM seam tape and splice adhesive from one manufacturer are typically not warranted for use with another manufacturer's membrane
Black EPDM has low solar reflectance and will not meet cool-roof code minimums (IECC/Title 24/ASHRAE 90.1) unless a white/reflective EPDM variant is specified
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