How Do You Frame For A Metal Roof

Take care the first piece is aligned precisely perpendicular square to the edge.

How do you frame for a metal roof.

When a metal roofing sheet must be installed on a curved roof screws should be installed at every overlapping rib at the sheet ends to resist the natural tendency of the metal to spring back. When you are done you will see the bare bones of the roof frame and plywood sheathing i e. Partially these will depend on the style of roof you ve selected but you ll also have some wiggle room depending on the design elements of the house. Space the screws about 12 in 30 cm apart down the entire piece of metal.

Metal should not be re bent once it has been formed nor should it be folded back on itself. Remove any nails sticking out and reposition any metal gutters so that water flows properly off the roof. Then remove the rest of the roof including all the shingles. Lay the first purlin at the ridge of the roof down to the chalk line beginning at either corner.

The plywood covers the entire roof and is solidly attached to the rafters providing a sturdy base for both insulation and metal roofing panels. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm. Fasten the purlin with 16d common nails into each vertical rafter. Snap a chalk line horizontally across the roof two feet down from the top.

The framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof. The decking of a roof is typically a plywood layer that is fastened directly onto the rafters. Spacing of furring strips for metal roof when installing a metal roof over an existing roof insulate the spaces between the wood strips with rigid insulation to prevent condensation before. Use your neoprene washer head screws to secure the metal to the sheathing.

Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Insert two equally spaced nails into the rafter.