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Class-c-roofing-assembly, class c roofing assembly. a roofing assembly that, in combination with the roof slope, has been classified by an approved testing agency, with a listing and follow-up service, as "class c" in compliance with astm e 108 or ul 790.. "class c" roofing assembly. a roofing assembly that, in combination with the roof slope, has been classified by an approved testing agency, with a listing and follow-up service, as "class c" in compliance with astm e 108 or ul, class c roofing assembly. a roofing assem-bly that, in combination with the roof slope, has been classified by an approved testing agency, with a listing and follow-up service, as “class c” in compliance with astm e 108 or ul 790. continuous roofing system. an impervi-ous roof covering, composed from a single or multiple.

General instructions gorilla guard® spec 30 shall be applied to a properly prepared roof deck that is smooth, clean, dry and free from any depressions,, class c roof assemblies are those that are effective against light fire-test exposure. class c roof assemblies and roof coverings shall be listed and identified as class c by an approved testing agency. 1505.5 nonclassified roofing nonclassified roofing is approved material that is not listed as a class a, b or c roof covering..

Wood shakes need to be fire retardant and labeled as a minimum of class "c" roofing assembly. wood shakes applied over asphalt shingle or wood shingle roofs need one layer of 18 inch, type 30 non-perforated felt interlaced between each layer of shakes. clay and concrete tile g:buildingadmin/web docs/reroofing requirements – 2016 code.doc, gorilla guard® product description gorilla guard® high performance underlayment for steep slope roof applications. made to order for the true professional.. 19itb729836k-jaj arff renovation phase ii invitation to bid page 1 of 3 invitation to bid 19itb729836k-jaj arff renovation phase ii sealed bids for furnishing all materials, labor, tools, equipment and appurtenances, wood shakes need to be fire retardant and labeled as a minimum of class "c" roofing assembly. wood shakes shall be installed only on slopes of 3:12 or greater. wood shakes are not permitted to be applied over an existing roof per section 1510.3 of the 2007 cbc. clay and concrete tile