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.

How to install metal roof purlins.

I was planning to install directly over 2x4 purlins which are mostly already installed. The purlin are ultimately used to fasten the roof steel providing a diaphragm effect along with the siding when properly engineered and installed. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. The roofing is manufactured in panels that.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. The topic we want to discuss today is the purlin installation.

Purlins are 2 by 4 feet and are installed much like metal roofing. This installation guide provides general advice on how to install a single skin sheeted metal roof. Next use 1 inch nails to secure some metal edging to the perimeter of the roof. Then cover the entire roof with a layer of insulation and secure it with a staple gun.

Installing wood stripping under a tin roof. Before you install metal roofing repair any damage to the wood under the shingles. The structure of purlin helps to shift some of the loads that put on the metal sheeting to the main building construction by ensuring that the whole things stay in their place and adding structural integrity. I am installing ribbed metal panels over a singlt slope roof on a new workshop.

Metal roof purlins are installed horizontally under metal roofs. 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.