US 11,987,985 B2
Metal roofing system
David E. Wenstrup, Greer, SC (US)
Assigned to Milliken & Company, Spartanburg, SC (US)
Filed by Milliken & Company, Spartanburg, SC (US)
Filed on Mar. 31, 2022, as Appl. No. 17/709,595.
Claims priority of provisional application 63/177,021, filed on Apr. 20, 2021.
Prior Publication US 2022/0333383 A1, Oct. 20, 2022
Int. Cl. E04D 3/35 (2006.01); B32B 5/02 (2006.01); B32B 5/10 (2006.01); B32B 15/14 (2006.01); E04D 1/22 (2006.01); E04D 3/18 (2006.01)
CPC E04D 3/351 (2013.01) [B32B 5/022 (2013.01); B32B 5/10 (2013.01); B32B 15/14 (2013.01); E04D 3/18 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2262/10 (2013.01); B32B 2262/144 (2021.05); B32B 2307/3065 (2013.01); B32B 2419/06 (2013.01); E04D 1/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A metal roofing system comprising, in order:
a roof deck having an upper side;
a fire resistant (FR) fleece having a first side and a second side, wherein the second side of the FR fleece faces the roof deck, wherein the FR fleece comprises a reinforcing scrim embedded therein, a plurality of FR staple fibers and a plurality of first char scaffold fibers selected from the group consisting of partially oxidized acrylonitrile fibers, silica fibers, and ceramic fibers, wherein the FR fleece has a fleece thickness defined as a distance between the first side and the second side; and,
a metal sheeting system comprising a plurality of metal sheets having an upper and lower side, wherein the lower side of the metal sheeting system faces the first side of the FR fleece, wherein the metal sheets have an average metal sheet thickness defined as a distance between the upper and lower sides,
wherein the fleece thickness is about 3 times to about 5 times the average metal sheet thickness, and wherein the FR fleece has a density of less than 0.5 g/cm3.