Should i use 2 4 or 2 6 rafters for shed roof.
How far apart rafters for rib steel roofing.
In this example the section of roof is 20 feet wide and 14 feet from the fascia to the peak.
Pole barn construction spaces the trusses 8 feet apart or even up to 12 feet apart depending on the building design.
With traditional stick frame construction the trusses are usually spaced 2 feet apart.
In this video i m installing some metal roofing over an existing ash fault shingled roof.
As the o c spacing gets larger the trusses have to carry more weight and be built heavier.
Therefore if you want a 10 12 single sloped roof and you live in a heavy snow area then you can space your rafters 16 apart and use spf 2 6 lumber.
Do all roofing projects require purlins.
Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run.
We do recommend it however.
This translates to seven rows of strips 20 feet long spaced two feet apart or 140 lineal feet of.
A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel.
They give added support to the roof and also provide a nailing surface for the end panels and drip edge.
Wider panels allow for greater spacing between rafters.
The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.
Purlins are 2 by 4 feet and are installed much like metal roofing.
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.
Truss spacing for metal roof just remember you can t use the same trusses for 24 48 or whatever centers.
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.
This is not a complete install only basic install on a bungalow i.
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 are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
Install the roofing screws vertically along each rib in the panel.
