How To Fix Roofing Sheets

Patching materials for metal corrugated roofing sheets.

How to fix roofing sheets.

Polycarbonate sheets should be installed with the ribs running in the direction of the slope and it is recommended that at least one of the ribs is securely clamped in the glazing system. 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. Use special roofing fasteners rather than standard screws to secure the corrugated sheets as they have a waterproof seal underneath the head that prevents leaks. To fix the sheets each tileform sheet has 5 troughs for securing we recommend you fix the sheet into trough 1 3 and 5.

The bottom end of the sheets you can fix in each trough to help prevent wind uplift of the sheets. You will have to paint the roof but is cheaper than buying new roofing. Use a piece of similar style corrugated roofing to patch holes. If fixing screws are left in the valleys your roof will leak in hundreds of places.

We recommend that stitch screws should be run every 300mm to 600mm along any metal joins. For corrugated sheets the fixings required will depend on the material used in the purlins. When joining panels you should use silicone sealant along their vertical length and overlap the sheets by one corrugation. Obtain some roofing mesh and cut out 2 identical square patches.

Stitch screws are used for metal on metal fastening and do not require anchoring to a purlin. What was previously a valley in the corrugations will now be a ridge and the nail hole will be in the correct place. Once you have your timber roof structure in place complete with waterproof membrane it s time to fix your corrugated roof sheets. Press one patch over the roofing cement.

You will need a number of corrugated sheets to complete your roof the number depending on how big your hut is. Stitch screws are smaller secondary fasteners and should be used for sheet side laps and the securing of flashings and ancillary components to the sheeting. Cladco offer a range of fixings available to fix into most purlin materials. At the eaves purlin additional fixing is necessary to prevent wind uplift and downslope slippage due to repeated thermal movement.

Apply the cement carefully with a putty knife until you ve sealed the hole completely. Fixing the corrugated roof sheets. Cut the piece large enough to cover the hole and 6 inches of the surrounding roofing each way using sheet metal cutters. Remove roofing and turn each sheet over.

Urethane roof cement is an excellent product that can help you patch holes on corrugated metal roofing.