Metal Roof Screws In Ridge Or Flat

My natural inclination would be to insert fasteners through the top of the rib so that the hole.

Metal roof screws in ridge or flat.

On metal roofing panels with ribs why would one drive screws through the flat part of the panel instead of through the top of the rib. The main cause of a leaking roof on a diy metal roofing installation is incorrectly fastening the screws. Valid arguments can be made for both preferences. If the screws are driven correctly fastening through either the valleys or the ridges of the roofing is considered acceptable in this country.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. If you live in a snow area this will help with ice and snow sheering screws of and me coming to fix your new roof. Quite often the screws are over tightened or under tightened and when this happens it creates leak points. The directions for installing metal roofing panels that are attached by exposed fasteners give different methods for nails vs screws.

Screwing high on the rib is difficult for the amateur. We do recommend it however. Screwing or fastening down a metal roof is one of the easiest parts of a metal roofing installation but it s also the most problematic. Your roof will have thousands of screw holes.

These panels have raised ribs. Do all roofing projects require purlins. I strap all roofs with nothing less than 2 4 to help lock that roof in place. Having done several metal roofs since then i would say if you are an amateur screw on the flat with 1 1 2 screws.