Fixing Box Profile Roofing Sheets

When fixing through the sheet directly into a timber purlin a 32mm timber tek screw is recommended.

Fixing box profile roofing sheets.

Suitable for attaching sheet metal to steel or wood. Ensure that the profile is straight using a plumb line or laser level. The bottom end of the sheets you can fix in each trough to help prevent wind uplift of the sheets. 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.

Barges corner edge flashings are again fixed through the top of the permaroof profile by using self drilling stitching screws. Fix the sheet through the valley or crown at every purlin support using a suitable fixing. 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. Our stitch screws will stitch sheet to sheet on the overlap as in diagram below.

Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer. Colour caps are used to cover the ends of fixings this allows the fixing to blend into the sheets colour. 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.

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. To fix the sheets each 34 1000 box profile sheet has 6 troughs for securing we recommend you fix the sheet into trough 1 3 4 and 6. If installing more than one steel roof sheet in the length you will need to allow a 300mm overlap between roof sheets.