How To Lap A Metal Roof

When the panel is laying flat on a surface the side that touches flat is the underlap side.

How to lap a metal roof.

This helps to prevent water infiltration. How to lap metal roofing a basic rule of thumb for installing metal roofing is that the piece of roofing higher up on the slope should always overlap the one below it. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. The opposite end the overlap side will be elevated slightly above the surface.

Try to space the screws about 12 inches apart down the entire piece of metal. Place the first screw. Space the screws about 12 in 30 cm apart down the entire piece of metal. Because of this you should start at the lowest part of the slope and work upward.

Take care the first piece is aligned precisely perpendicular square to the edge. Use your neoprene washer head screws to secure the metal to the sheathing. Install the roofing screws vertically along each rib in the panel. 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.

Moreover try to ensure that the screws are all aligned evenly. Metal roofing ridge cap is the trim placed along the roof s ridge the peak where two roof slopes meet up. You will use metal roofing screws to secure the metal panels to the sheathing. A ridge cap is normally installed only after all metal roof panels and any other trim are in place.

And for any exposed fasteners try to avoid over tightening them. 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. 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. 2 lay 6 inch wide butyl tape over all horizontally lapping end seams.