Clean the exterior walls of the building where the cladding is to be fitted. The walls must be free of dirt and any nails must be hammered in to avoid damaging the foam backing.
Nail the foam backing to the wall and fix duct tape over each join. Start at the bottom corner of the wall and work along the wall before starting the next row. Leave a 2-inch gap at the bottom, top and corners of the walls and around door and window frames. Complete the whole area before starting to fit the steel cladding.
Secure the starter channel along the bottom of the wall using 1 1/2-inch aluminum nails. Fit the corner caps over the corners of the walls and fit J channel around each window and door frame. Cut the channels and corner caps to size using the circular saw.
Fix the first steel cladding sheet to the lower corner of the wall, sliding it into the starter channel. Hammer in place using 1 1/2-inch aluminum nails through the specially made fixing holes, but do not hammer in all the way because the steel expands and shrinks as the temperature changes.
Fit the next sheet, overlapping the first by 2 inches to form a water-resistant barrier. Move along the wall, fitting each sheet until you finish the row. Check that the sheets are level as you fit them, using the spirit level.
Cut 1 foot off the width of first sheet of the second row with the circular saw. Slot the cut end into the corner cap and nail in place using 1 1/2-inch aluminum nails. Fit the next sheet, overlapping the first by 2 inches. The vertical seam will be staggered from the previous row. Start the next row with a complete sheet and the one after that with a cut sheet.