Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.
1x4 perlins for metal roof.
Installing wood stripping under a tin roof.
Now if you are strapping the rafters 1x4 pt is usually used set at 2 intervals or closer and you double the first one at the edge of the metal chandler view public profile.
We do recommend it however.
The roofing is manufactured in panels that.
Do all roofing projects require purlins.
Engineered purlin metal mart offers a complete line of engineered purlin material.
Most you see on homes and many commercial building is non structural metal roofing and needs to be on solid sheathing.
There are two ways to do this put in firring nailing though nails are not used any more for this strips or purlins in steel frame construction on the roof to support it or place the metal roofing directly on a flat surface like foam insulation board or the roof sheathing with roof water barrier in the correct position in the layer.
On metal frame building and the like you will likely see structural metal roofing installed on purlins that is what those 1x4 are purlins and those metal roofing panels are rated for that type of installation.
The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.