Fixing Box Profile Roofing Sheets

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Fixing box profile roofing sheets.

Ensure that the profile is straight using a plumb line or laser level. 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. The bottom end of the sheets you can fix in each trough to help prevent wind uplift of the sheets. Usually 10 12 fixings are fitted on either side of each 3m length of flashing at 250 300mm centres.

As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head. Suitable for attaching sheet metal to steel or wood. Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer. 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.

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. 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. Our stitch screws will stitch sheet to sheet on the overlap as in diagram below. When fixing through the sheet directly into a timber purlin a 32mm timber tek screw is recommended.

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. 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.