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step-by-step guide to installing corrugated metal roofing

by:Topson     2020-08-08
Corrugated metal roofs are made of aluminum or galvanized steel.
It is mainly used in sheds, barns and similar buildings.
It is rarely used on residential roofs because it is difficult to properly heat insulation.
There are many corrugated patterns, and the height and width of the peaks and valleys are different.
The standard is 2 1/2 by 1/2, the corrugated peak is 2 1/2 apart, and the overall height is 1/2.
This style has 27 inch wide sheets, designed to cover a roof of 24 inch, allowing the panels on the edges to overlap and the length of the panels from 8 to 20 feet.
Measure the roof with a tape measure to determine the number of panels required.
Try to purchase a length panel that covers both sides of the roof with one panel to simplify the installation; use 12-
For example, if the distance from the peak to the edge is about 12 feet, some overlap is allowed at the bottom.
Divide the width by the coverage of the panel, usually 24 inch.
Install the corrugated board on a solid deck or a \"belt\" sheath of 1-1by-4-
The inch plate is nailed horizontally to the raf, or at 24-inch intervals.
Sheaths are common in sheds and barns that do not require insulation under sheaths.
Lay roof paper on a solid deck and fix it in place.
Fix the strap sheath on the raf sub or truss with 8d galvanized nails.
Set the first panel in place and align it with the bottom and edge of the roof.
Fix it with a galvanized screw with a plastic washer cap, drive it with a screw gun and enter the second Valley from the edge.
In the Valley about 1 feet away, push another screw into the sheath to keep the panel.
Add screws on each foot and on each strip.
About 20 screws are used per panel.
Do not put the screws into the last valley on the inner edge.
The second panel is overlapped by a ridge and a valley.
Fix it with screws through the panel and below.
Add other screws to secure the panel.
Place other panels in the same way until the roof is covered from one side to the other.
If necessary, cut the panel half vertically with a tin cut and start the second line so that the seams do not overlap.
Overlap the second line with the next line by at least 6 inch.
Cover both sides of the roof with corrugated cardboard.
Fix the peaks with a special ridge cap to match the ripples.
Screw these on both sides of the roof.
Add edge caps on the bottom and side of the roof to prevent water from entering under corrugated metal;
These usually slide under the corrugated panel and are fixed with screws through the panel and edge cover.
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