How To Install Metal Roof Purlins

Next use 1 inch nails to secure some metal edging to the perimeter of the roof.

How to install metal roof purlins. I am installing ribbed metal panels over a singlt slope roof on a new workshop. I was planning to install directly over 2x4 purlins which are mostly already installed. Then cover the entire roof with a layer of insulation and secure it with a staple gun. 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.

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. This installation guide provides general advice on how to install a single skin sheeted metal roof. The purlin are ultimately used to fasten the roof steel providing a diaphragm effect along with the siding when properly engineered and installed.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. This shop will be insulated but mostly unheated except when i m working in there say 10 hours a week. Installing wood stripping under a tin roof. The topic we want to discuss today is the purlin installation.

Before you install metal roofing repair any damage to the wood under the shingles. Purlins are dimensional lumber that are fastened to the top chord of trusses connecting them together for bracing purposes. During the roof installation or re roofing process after the roof sheets are prepared it is time to support their framework by installing purlins. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.

Metal roof purlins are installed horizontally under metal roofs. 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.