Galvanised corrugated panels are a type of roofing material made from steel. This steel is in sheet metal form and is crimped into a shape to make it stronger and create grooves along the panel. It is often found in rural areas and on barns. Galvanised corrugated roofing panels are installed directly on top of the sheathing or plywood underneath. They are appropriate for steep roofs because they allow water and other debris to easily run off the roof.
Measure the length and width of the roof and multiply the two to get the total square footage and determine how many sheet of corrugated panels will be needed for installation. The panels come in 2-by-4-foot sections totalling 8 square feet each.
Roll out felt paper directly on top of the sheathing beginning in any bottom corner of the roof. This will act as a water barrier. Staple the felt in place with a staple gun. Insert a staple every 8 inches through the felt and into the sheathing underneath. Continue until you reach the end of the first side.
Cut the felt off at the end of the roof with a utility knife. Install the second row directly above the first with an overlap of 4 inches. Work up the roof, overlapping the rows by 4 inches until the roof is completely covered in felt.
Lay the first corrugated panel on the roof at the bottom corner. Screw it down in place with sheet metal screws and a power drill. Insert a screw between each groove in the centre of the panel. Overlap the second panel by one groove over the first and install it in the same manner.
Install the remaining panel of the first row the same way. Set the first panel of the second row directly above the first and install the second row and all of the remaining rows just like the first until the roof is completely covered.