Metal Roof Purlins Or Sheathing

Use screws with solid sheathing.

Metal roof purlins or sheathing.

Metal roofing roof panels the home depot store finder. Get free shipping on qualified metal roofing or buy online pick up in store today in the building materials department. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. In order to avoid a hump at the transition from two layers of materials to one the notation on the building plans advises to lower the roof purlins in these areas by 7 16. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. But i am convinced after inspecting thousands of asphalt shingled roofs metal is the way to go.

Roof pitch the metal roofing panels shown in this manual require a mini. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. The difference in strength for wind and snow load are my concerns on whether to use purlins or sheathing versus cost. Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern.

Purlins girts and roof deck. For best results with aluminum panels use 300. I am doing an exsposed fastener metal roof on my own place.