Rafter Spacing For Metal Roof Vs Shingles

Wider panels allow for greater spacing between rafters.

Rafter spacing for metal roof vs shingles.

The support system for the roof is comprised of ridgepole and rafters or purlins. Asphalt shingle roofing is a dominant material for residences. For light load roofs 24 o c. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

Pole buildings with metal roofs are typically built with metal roofs resting directly on rafters and purlins horizontal members that run between rafters and tie them together. 2x10 rafters on 4 centers with joist hangers attached to a 2x10 header sitting on 10 pole spacing. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. Now there are metal shingles and panels that imitate materials like slate tile wood shake and even asphalt.

Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. The roofing is manufactured in panels that. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Because this roof design doesn t have the added weight of plywood roof sheathing and metal roofs are generally lighter than asphalt shingle roofs the rafters have much less weight to bear than they would in a conventional design.

Rafter spacing is based on the width of the metal roofing panels. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. For heavy loads 2x4s can span up to 5. However metal roofing is surging in popularity as more aesthetic options become available.

Installing wood stripping under a tin roof. 2 4 rafters can span up to 7. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. What s the difference between an asphalt shingle and metal roof.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.