Roofing Screws Too Long For Metal Roof

Water damage to underlying material.

Roofing screws too long for metal roof.

Designed to fasten multiple layers of metal roof panels metal siding panels attach trim to metal building sheets or seal lap joints of metal building sheets. Pipe flashing covered by too few screws. In some homes this means using 1 inch screws to get the appropriate distances. Some roofers make the mistake of letting the metal panels extend too much or too little over the roof s edge.

Remember a screw down metal roof has the fasteners exposed through the top of the panels. Let the panel overhang by about an inch and a half to 2 inches. This applies to the gable edge and the bottom end of the roof. 9 10 12 and procap metal to wood screws are 1 4 hex head screws 12 14 and proz metal fasteners are 5 16 hex head screws.

Due to its lack of expansion and contraction these fasteners get wallowed out until they re too big for the screws that hold the metal panels down. Generally it is best to place each roofing screw about one and half to two feet apart but no more than that. Screws may not be able to grip the underlying material enough to properly hold the metal roof down. The metal roof paneling is supposed to end up about two to three inches below the home s vented ridge and should be two to three inches beyond the roof s eaves according to absolute steel metal roofing instructions.

Proper tools not only is it crucial to have proper metal roofing screws but using a proper screw gun such as one powered by an air compressor will ensure safety as well as a strong finished look. The purpose of the spacing is related to the drip edge.