How To Install Purlins For A Metal Roof

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.

How to install purlins for a metal roof.

Setting corrugated metal roof purlin spacing in a proper distance is an important part of the entire process. 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. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.

Let s take a look at the most common types of metal roofs for houses. You would have to measure the roof and drill the screw holes in the locations of the metal purlins. Installing wood stripping under a tin roof. An engineer will use a load chart in order to determine the spacing between metal purlins.

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. Purlins are 2 by 4 feet and are installed much like metal roofing.

Screw line spacing for metal roofing over metal purlins. This will depend upon the type of panel that is used and the thickness of the steel. Whether you are looking to install a metal roof on a shed or a house it s important to know the difference in the various types of metal roofs available. 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. The roofing is manufactured in panels that. They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. In addition if the metal roofing panel is being installed over metal purlins the spacing of the purlins might make it tricky to pre drill the sheeting in advance.

They are also popular for the people who like to install the roof themselves because the process is easier. The purlin are ultimately used to fasten the roof steel providing a diaphragm effect along with the siding when properly engineered and installed. Metal panels has great resistance to bugs and fires to the extreme condition such as snow wind and storm. Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Once you ve done that add your metal roofing panels beginning at the longest peak to.