Fixing Metal Roof Sheets

These include steel aluminum tin copper and zinc.

Fixing metal roof sheets. Fixings used to attach roofing sheets to purlins having to be durable and able to withstand considerable wind pressures. 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. Some of these materials are subject to oxidation. Most metal roof panels are made from sheet metal that has been coated with a protective surface.

Remove roofing and turn each sheet over. Pull and re nail them. Metal roofs are made from a wide variety of materials. As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head.

If fixing screws are left in the valleys your roof will leak in hundreds of places. You will have to paint the roof but is cheaper than buying new roofing. What was previously a valley in the corrugations will now be a ridge and the nail hole will be in the correct place. The exact type of fixings required will depend on the roofing sheet and purlin type either timber light steel or heavy steel however we recommend self drilling tek type screws with a 5 16th hex head for optimum performance.

If you asked two installers whether they pre drill metal roofing sheets prior to installation you would likely get two completely different answers. 2 look for holes rust patches or other signs of deterioration. 1 look for loose nails. This means that the screw will drill its own hole through the metal roofing panel and into the metal or wood substrate.

Then prime the surface with a metal primer and follow up with a top coat to match the color of the roof. If you find any remove rust with a wire brush and or steel wool.