How To Install Metal Roof Purlins

The purlin are ultimately used to fasten the roof steel providing a diaphragm effect along with the siding when properly engineered and installed.

How to install metal roof purlins.

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 are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. I am installing ribbed metal panels over a singlt slope roof on a new workshop. Metal roof purlins are installed horizontally under metal roofs.

This shop will be insulated but mostly unheated except when i m working in there say 10 hours a week. I was planning to install directly over 2x4 purlins which are mostly already installed. Purlins are dimensional lumber that are fastened to the top chord of trusses connecting them together for bracing purposes. 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.

Installing wood stripping under a tin roof. Then cover the entire roof with a layer of insulation and secure it with a staple gun. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. The roofing is manufactured in panels that. Before you install metal roofing repair any damage to the wood under the shingles. Purlins are 2 by 4 feet and are installed much like metal roofing.

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. During the roof installation or re roofing process after the roof sheets are prepared it is time to support their framework by installing purlins.