How To Lap A Metal Roof

Install the roofing screws vertically along each rib in the panel.

How to lap a metal roof.

Moreover try to ensure that the screws are all aligned evenly. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Place the first screw. 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.

The opposite end the overlap side will be elevated slightly above the surface. Space the screws about 12 in 30 cm apart down the entire piece of metal. Metal roofing ridge cap is the trim placed along the roof s ridge the peak where two roof slopes meet up. 2 lay 6 inch wide butyl tape over all horizontally lapping end seams.

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. Use your neoprene washer head screws to secure the metal to the sheathing. A ridge cap is normally installed only after all metal roof panels and any other trim are in place. Sweep the metal roofing sheets of all dirt and debris with a push broom.

When the panel is laying flat on a surface the side that touches flat is the underlap side. And for any exposed fasteners try to avoid over tightening them. Take care the first piece is aligned precisely perpendicular square to the edge. Position the tape with the release backing on the top.

You will use metal roofing screws to secure the metal panels to the sheathing. 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. Because of this you should start at the lowest part of the slope and work upward.