More Picture Of What To Put Down Under Metal Roofing Best Images PNG. Attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturers instructions and local building codes. Make sure that the insulation you are using is the same thickness so that the metal roof will fit better.
When hot roof construction is done a roof with no ventilation a breathable underlayment is recommended. Also roof fasteners should be driven into appropriate clips and pre-drilled purlins not the wood furring strip. Often the material used is not actually tin but galvanized steel or aluminum.
Underlayment must also act as a secondary weather barrier in case the roof fails.
However before you decide on reroofing with a metal roof you have to keep in mind that there are specific conditions that make reroofing with a. Enclosed air space between bubble insulation and metal exterior roof. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Some of the most common types of materials used for a roof underlayment are mats that are made from nylon filaments and foam insulating panels.