Roof Cladding Fixing Details

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.

Roof cladding fixing details.

Supporting your roof sheets. This will keep weather out prevent lifting in high winds and provide a neat fin ished appearance. All the information contained in our help guides are for reference only. Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer.

At the gable edge use a gable or sidewall flashing. 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. The trim and roofing sheet should be fastened every 12 to 24 inches along the gable edge. As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head.

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. Fasteners in joints of simple seams flat sheet steel joints should generally be no further apart than 50mm. Cutting sheets and flashings. The general advice for fixing is 4 5 screws across the sheets purlin we advise using 1 screw on the overlap of the next sheet.

Fasteners in joints with profiled roofing e g. Side lap joints can be spaced further apart. To provide a drip edge allow an overhang of 1 to 2 inches at the eave.