How To Install Metal Roof With Purlins

They give added support to the roof and also provide a nailing surface for the end panels and drip edge.

How to install metal roof with purlins. Before you install metal roofing repair any damage to the wood under the shingles. It is a horizontal bar that used to support building at the roof structurally. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. Purlins are 2 by 4 feet and are installed much like metal roofing.

There is an available purlin for every type of roofing material including purlin span for metal roof which is the most common material type to use this item. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. 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. Next use 1 inch nails to secure some metal edging to the perimeter of the roof.

The roofing is manufactured in panels that. The topic we want to discuss today is the purlin installation. Metal roof purlins are installed horizontally under metal roofs. I was planning to install directly over 2x4 purlins which are mostly already installed.

During the roof installation or re roofing process after the roof sheets are prepared it is time to support their framework by installing purlins. Purlins are dimensional lumber that are fastened to the top chord of trusses connecting them together for bracing purposes. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. This installation guide provides general advice on how to install a single skin sheeted metal roof.

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

This shop will be insulated but mostly unheated except when i m working in there say 10 hours a week.