How To Install Metal Roof Purlins

The roofing is manufactured in panels that.

How to install metal roof purlins.

Purlins are dimensional lumber that are fastened to the top chord of trusses connecting them together for bracing purposes. The topic we want to discuss today is the purlin installation. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. The advice within this installation guide is of a limited nature and should only be used as a guide its not be relied upon as an exact instruction on how a roof should be safely installed which will vary with circumstances.

The purlin are ultimately used to fasten the roof steel providing a diaphragm effect along with the siding when properly engineered and installed. Metal roof purlins are installed horizontally under metal roofs. Then cover the entire roof with a layer of insulation and secure it with a staple gun. This installation guide provides general advice on how to install a single skin sheeted metal roof.

I am installing ribbed metal panels over a singlt slope roof on a new workshop. Before you install metal roofing repair any damage to the wood under the shingles. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. 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.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Installing wood stripping under a tin roof. Purlins are 2 by 4 feet and are installed much like metal roofing. Next use 1 inch nails to secure some metal edging to the perimeter of the roof.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. I was planning to install directly over 2x4 purlins which are mostly already installed.