WK56290 proposed revision
WK26595 New Guide for Standard Guide for Evaluating the Durability of a PVC Roofing Membrane System
WK26596 New Practice for (Product Category Rule)for Preparing Environmental Product Declarations of Low Slope Roofing Membranes.
WK41167 New Guide for the Durability of EPDM Roofing Membranes
WK46735 New Guide for Evaluating the Variables that can Increase the Durability of an Installed Flashing Assembly