SPRI Bulletin Offers Recommendations on Revisions to FM 4470
WALTHAM, Mass. — SPRI has published a detailed Bulletin that includes recommendations for the design and contractor communities on important changes recently made to FM Approvals (FM) Standard 4470. The four-page Bulletin, an Excel worksheet and an executive summary are available for download at www.spri.org/publications/policy.htm.
On Oct. 18, 2012, FM officially notified roofing system manufacturers and component suppliers of the revised FM Approval Standard 4470 (FM 4470), “Single-Ply, Polymer-Modified Bitumen Sheet, Built-UP Roof (BUR) and Liquid Applied Roof Assemblies for use in Class 1 and Noncombustible Roof Deck Construction.” The effective date of the revised FM 4470 is Dec. 31, 2012. The notification letter and some details and anticipated changes can be found at www.roofnav.com.