1x4 Spacing For Metal Roof

Some contractors feel that 7 16 osb roof decking is a poor choice for the supplied screws preferring the solid 1x4 s.

1x4 spacing for metal roof.

Trim the most common flashing for metal roofing is the ridge cap which is used at the peak of a roof. Wider panels allow for greater spacing between rafters. Metal roof installed on 1x4s that is how the tin often gets put on homes up here on acerages and farms. Do all roofing projects require purlins.

The 1x4 s are usually applied right over the shingles once the sheeting and shingles overhangs are cut off. Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern.

To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel. However the screw placement diagrams commonly are based on the on center spacing center to center of the purlin rather than the gap between purlins to determine the length and spacing of the screws needed to prevent wind blowoff for various design wind speeds so pay close attention to that difference. See page 6 for more information on screw spacing and ordering. Place corner pieces where panels will meet bends at the edge of the roofing.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. We do recommend it however. Twenty four inches is a common spacing of furring strips for a metal roof. Metal roofing source grand rib 3 multi purpose classic rib grand rib 3 panels are a strong durable economic and attractive answer to the growing demand.