Method for producing roofing felt

Details Method for producing roofing felt Method for producing roofing felt

E - Fixed Constructions

04

D

20/50, 28/9

E04D 5/02 (2006.01) D06N 5/00 (2006.01)

Patent

CA 1133677

METHOD FOR PRODUCING ROOFING FELT ABSTRACT An improvement in the method of perforating roofing felt, which is comprised of felt saturated with an asphal- tic material, comprising perforating said roofing felt with a plurality of needles heated to a temperature of 200 to 600°F above the softening point of said asphaltic material, thereby forming small discrete passages through said roof- ing felt corresponding to said needles.

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