Fixing Metal Roof Sheets

If you asked two installers whether they pre drill metal roofing sheets prior to installation you would likely get two completely different answers.

Fixing metal roof sheets.

Some of these materials are subject to oxidation. The screws that are used to attach the metal roofing are self drilling screws. Remove roofing and turn each sheet over. Most metal roof panels are made from sheet metal that has been coated with a protective surface.

If you find any remove rust with a wire brush and or steel wool. What was previously a valley in the corrugations will now be a ridge and the nail hole will be in the correct place. 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.

Then prime the surface with a metal primer and follow up with a top coat to match the color of the roof. These include steel aluminum tin copper and zinc. Pull and re nail them. Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer.

If fixing screws are left in the valleys your roof will leak in hundreds of places. This means that the screw will drill its own hole through the metal roofing panel and into the metal or wood substrate. You will have to paint the roof but is cheaper than buying new roofing. 2 look for holes rust patches or other signs of deterioration.

Over time this coating can wear away leaving the metal panels to oxidize. Metal roofs are made from a wide variety of materials.