Rafter Spacing For Metal Roof Vs Shingles

The roofing is manufactured in panels that.

Rafter spacing for metal roof vs shingles.

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. For light load roofs 24 o c. Spacing your 2 4 shed rafters at 24 on center limits the width of your 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.

Asphalt shingle roofing is a dominant material for residences. Metal roofs generally can run from 120 to 900 per 100 square feet one 10 foot by 10 foot area or a square of material while asphalt shingles will be between 100 and 200 per 100. The support system for the roof is comprised of ridgepole and rafters or purlins. The additional lento s have less bounce in them than the existing pole barn roof did that was trusses on 10 centers.

For heavy loads 2x4s can span up to 5. 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. 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. 2 4 rafters can span up to 7.

However metal roofing is surging in popularity as more aesthetic options become available. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. Purlins were 2x4 laid flat on 2 centers spanning the 4 between rafters.

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. Installing wood stripping under a tin roof. Rafter spacing is based on the width of the metal roofing panels. 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.

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. Wider panels allow for greater spacing between rafters.