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.
Installation instructions for corrugated metal roofing.
Buy the metal panels.
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Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses.
Finish the first side of the roof.
Lay the roofing felt.
Once the first sheet is in place you need to install the remainder of the lowest row of corrugated metal roofing.
And for any exposed fasteners try to avoid over tightening them.
Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart.
Lay the remainder of the row.
You will use metal roofing screws to secure the metal panels to the sheathing.
Always begin working at the point with the longest peak to eave distance.
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When installing a metal roof over an existing roof insulate the spaces between the wood strips with rigid insulation to prevent condensation before installing the roofing.
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.
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.
Take care the first piece is aligned precisely perpendicular square to the edge.
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To install corrugated roofing start by cutting your panels to length with an angle grinder.
Add the metal panels.
At this point chalk a line from ridge to eave.
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.
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2 corrugated metal roof installation instructions.
Measure one panel width in from the roof edge.
It is extremely important that this panel be laid square to the eave and ridge so that the remaining panels will line up square on the roof frame.
Try to space the screws about 12 inches apart down the entire piece of metal.
Lay and secure the first metal panel.
Installation guides from asc building products a leading manufacturer of metal roofing and siding for residential commercial and agricultural applications.
1 tools required for installing corrugated metal roofing.
Complete the first row.