Fixing Box Profile Roofing Sheets

Usually 10 12 fixings are fitted on either side of each 3m length of flashing at 250 300mm centres.

Fixing box profile roofing sheets.

As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head. Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer. Set the first sheet upright against the framing purlins at the corner of the building with the first sheets overlap edge to the corner of the building. Box profile sheet fixings trapezoidal or box profiled sheets should be fixed through every valley pan lowest point of the profile at every purlin with extra fixings being used at the ridge and eaves profiles for added strength.

Fix the sheet through the valley or crown at every purlin support using a suitable fixing. Lapping tape with a section of 9mm x 1 5mmmastic should be run along the crest of the profile that is to be lapped sheet to sheet stitching screws should then be used at 600mm intervals down the lap toconsolidate the bondcreated by the lapping tape. Free next day delivery available or click collect from stores. Box profile roof sheets should be fitted from left to right our screws are to be fixed through the lower part or valleys of the roof sheets.

If installing more than one steel roof sheet in the length you will need to allow a 300mm overlap between roof sheets. The bottom end of the sheets you can fix in each trough to help prevent wind uplift of the sheets. When fixing through the sheet directly into a timber purlin a 32mm timber tek screw is recommended. Ensure that the profile is straight using a plumb line or laser level.

Colour caps are used to cover the ends of fixings this allows the fixing to blend into the sheets colour. Barges corner edge flashings are again fixed through the top of the permaroof profile by using self drilling stitching screws. Suitable for attaching sheet metal to steel or wood.