Corrugated Sheet Fixing Detail

Commence fixing sheets at the lower edge of the roof at the opposite end to the prevailing winds.

Corrugated sheet fixing detail.

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. A corrugated metal roof is quieter than pvc when it rains. The sheets should be laid to ridge apex to ensure sufficient weathering cover is provided. It is important that the maximum support centres given for the type of corrugated sheet being used are not exceeded between purlins.

Start alternate courses of sheets with a half width sheet. For corrugated sheets the fixings required will depend on the material used in the purlins. Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer. This forms a broken bond sheet pattern thus avoiding a 4 ply sheet thickness build up at the corners of sheets.

Step 2 position and fix an additional purlin at the ridge to take ridge fixings. Stagger the sheets using a half sheet to start the second row. Obtain some roofing mesh and cut out 2 identical square patches. Apply the cement carefully with a putty knife until you ve sealed the hole completely.

To fix the sheets each tileform sheet has 5 troughs for securing we recommend you fix the sheet into trough 1 3 and 5. One downside is that the metal sheets have a susceptibility to denting both in installation and during hailstorms. As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head. The bottom end of the sheets you can fix in each trough to help prevent wind uplift of the sheets.

Laying the sheets.