Roof Cladding Fixing Details

Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer.

Roof cladding fixing details.

Fasteners in joints with profiled roofing e g. To provide a drip edge allow an overhang of 1 to 2 inches at the eave. As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head. Spacing of the fixing will depend upon the type of joint to be sealed.

Cutting sheets and flashings. At the gable edge use a gable or sidewall flashing. The trim and roofing sheet should be fastened every 12 to 24 inches along the gable edge. Most roof claddings must be installed over a roof underlay which generally provides the only back up in case of water penetration through the cladding.

Fixing and securing sheets. Side lap joints can be spaced further apart. Supporting your roof sheets. Filling gaps at eaves and ridge.

In accordance with manufacturer specification all roof cladding needs to be pitched flashed and finished to increase weathertightness building basics for making homes weathertight search. Fasteners in joints of simple seams flat sheet steel joints should generally be no further apart than 50mm. Roof underlays form the secondary line of defence and must be accurately installed to ensure that any water on the underlay is drained to the external edge of the roof and does not pond beneath.