Learn about Standard Letters

Standard Letters Documents

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Letter from Factory Mutual Regarding Changes to FM Approval Standard 4470

Letter from FM highlighting changes recently made to Approval Standard 4470.

New Factory Mutual Max Deck Spans (ft.) by Wind Rating/Fastener Spacing, Sheet Gauge (33 and 80 ksi)

Updated FM 4470 deck spans by wind rating/fastener spacing and deck gauge for 33 ksi and 80 ksi.

Ice Melt Products on EPDM, TPO and PVC Membrane

A standard letter on Carlisle's position on using ice melts on EPDM, TPO and PVC Membranes. 

M-1 Sealant

Carlisle's EPDM, TPO & PVC Membrane Compatibility with M-1 Sealant.

Gypsum Wall Board Flashing

Standard Letter: Gypsum Wall Board Flashing
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  • Carlisle SynTec Systems
  • P.O. Box 7000, Carlisle, PA 17013
  • Ph: 800-479-6832
  • Fax: 717-245-7053
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