5 Best Of What To Put Under A Metal Roof Best Wallpaper JPG. There are two ways to do this - put in firringnailing though nails are not used any more for this strips or purlins in steel frame construction on the roof to support it or place the metal roofing directly on a flat surface like foam insulation board or the roof sheathing with roof water barrier in the correct position in the layer. Basically any house in Montana from Billings to Philipsburg to Zortman is going to be built this way.
Cross purlin designs with 16 OC are sometimes called for. The first goal of roofing underlayment is to keep the roof deck dry before installation of the metal roofing material. The Most Popular Materials Fiberglass Batts or Glass Mineral Wool Metal Roof Insulation.
You should see a layer of plywood roof sheathing supported by a framing system.
This foam can be used on either the outside or the inside of the sheathing. The impact of condensation in post-frame buildings is very real. The best way to stop it is with a high-temperature waterproofing underlayment stuck to the entire roof deck. Basically any house in Montana from Billings to Philipsburg to Zortman is going to be built this way.