GAF’s warranties tend to be more stringent than CertainTeed’s, so there are actually more causes for that producer to deny you warranty Positive aspects. The roof decking would be the layer of plywood or O.S.B. nailed for the trusses or rafters. Roof decking is often seven/sixteen” and is available in https://knoxugpyh.blogtov.com/9230836/local-metal-roofers-secrets