How Much Overlap On Metal Roofing

The sheets should overlap by at least four inches add a bead of caulk where they overlap and at the other end of the building ensure there s an overhang of two inches.

How much overlap on metal roofing.

Install the roofing screws vertically along each rib in the panel. Overlapping anti condensation lined sheets. Learn how much to overlap the corrugated sheeting. Apply side lap sealant if the pitch of your roof is 2 12 or less.

Install metal panels or shingles align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. On the eave side of the roof aim to overhang the panels by 1 to 1 5 inches. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. The panels overlap allowing water to flow from one panel to the next without being able to penetrate the area under the roofing panel.

If you re installing a metal roof on a home without gutters you can overhang the panels by twice that amount. When laying the metal panels on the roof the overlap ridge of the new panel should straddle the underlap ridge of the panel before it. Secure the sheets into place with screws. As a first line of defense against water damage it is important that the metal roof overlap be implemented correctly.

If end laps are required you should allow 300mm minimum overlap sealed with butyl sealant tape 10mm from the edge of each overlapping sheet as well as in the middle of the overlap. Installing corrugated metal roofing will require you to lap the m. Any end laps must be supported by a suitable purlin. Once the first sheet is in place you need to install the remainder of the lowest row of corrugated metal roofing.