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Joseph Jenkins, Inc. has a list of free online publications from Joseph Jenkins, Inc., a company specializing in slate roofing application and consulting.
Sprayfoam.com is a portal that provides online resources for all things related to spray foam insulation and roofing. Roof Wind Designer is intended to provide users with an easy-to-use means for accurately determining roof system's design wind loads for many commonly encountered building types that are subject to building code compliance.
Wind Roof Calculator Wind-RCI, or the Wind Roof Calculator on the Internet, is courtesy of the NRC’s Institute for Research in Construction.
Calculating Measurements: Area of a trapezoid, compliments of MRCA, NRCA and NERCA
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