There are various kinds of metal roofing and all can be set up on a properly styled gable roof, with a centre summit and slopes on two sides. The three common styles of metal roofing are corrugated, with alternating ridges and valleys; standing seam, with broad horizontal sections and vertical seams, and metal tiles, which may resemble slate or alternative materials. Corrugated and standing seams are installed in large panels, tiles as independent tiles. All are steel or aluminum.
Frame the fundamental gable roof with trusses to any pitch that is acceptable. Install metal roofing just with a pitch of 4/12, which rises 4 inches per foot, or steeper; it isn’t suited to horizontal or low-slope roofs and functions best on steeper pitches of 6/12 or longer. Sheath the roof with oriented strand board and roof paper and insulate it like you would any roof.
Install Concrete panels with solid steel or aluminum screws, based upon the metal roof, with vinyl washer heads. Run corrugations down the roof. Start at one bottom edge, fasten a plank aligned with the side and bottom edges of the sheathing and fix it with about 20 screws per panel. Overlap panels horizontally by one ridge and a single valley and vertically by at least 6 inches.
Fasten standing seam panels typically together with clips, which can be secured to the framing and also maintain the panels; special clip kinds and setups vary with manufacturers. Twist panels together at seams, the border of a single fitting into a slot on another panel, similar to tongue and groove timber. Have panels pre-cut to size usually, as it can be difficult to cut back standing seam panels onto a job site.
Lay metal tiles similar to you would wood or composition shingles or replacements. Start with a row of tiles in the bottom of a single edge of the roof. Fasten the shirts with nails or screwsfollow manufacturer’s directions for specifics as styles vary. Start a second row with a half shingle, so the seams do not align, and also work across and up the roof installing tiles, with ends and seams overlapped.
Place metal edge flashing down on almost any style of metal roof, but fit the flashing to the kind of roof; corrugated and tile, for instance, use very different kinds. Install flashing any chimneys, vent pipes or other openings, again matching the flashing to the roof material. Finish a gable peak on any metal roof with special peak caps, that overlap the metal roof on both sides.