How Far Apart Rafters For Rib Steel Roofing

Should i use 2 4 or 2 6 rafters for shed roof.

How far apart rafters for rib steel roofing.

Purlins are 2 by 4 feet and are installed much like metal roofing. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Do all roofing projects require purlins.

As the o c spacing gets larger the trusses have to carry more weight and be built heavier. You should use 2 4 rafters if you live in an area without heavy snow or wind loads. In this video i m installing some metal roofing over an existing ash fault shingled roof. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.

We do recommend it however. Metal roof purlins are installed horizontally under metal roofs. Truss spacing for metal roof just remember you can t use the same trusses for 24 48 or whatever centers. Wider panels allow for greater spacing between rafters.

With traditional stick frame construction the trusses are usually spaced 2 feet apart. Metal roofing is a unique trend in roofing and this guide will walk you through the steps including how to install metal roofing over shingles. This translates to seven rows of strips 20 feet long spaced two feet apart or 140 lineal feet of. This is not a complete install only basic install on a bungalow i.

Pole barn construction spaces the trusses 8 feet apart or even up to 12 feet apart depending on the building design. For instance the material is used in roofing might be slate and that will mean that the roof trusses are built with different spacing and different material than for instance the material and how far to space roof trusses if you had say an aluminum roof. They give added support to the roof and also provide a nailing surface for the end panels and drip edge. In this example the section of roof is 20 feet wide and 14 feet from the fascia to the peak.

Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run. Install the roofing screws vertically along each rib in the panel.