Wood Purlins For Metal Roof

Installed directly over purlins or joists.

Wood purlins for metal roof.

Purlin is a well known material in the field of architecture structural building or structural engineering. 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. Spacing of furring strips for metal roof when installing a metal roof over an existing roof insulate the spaces between the wood strips with rigid insulation to prevent condensation before.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. 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. Step 1 run a tape measure from end to end along the rafters of the roof to determine how many purlins will be needed for installation. This curved standing seam metal roof system also may be installed over wood decks and metal decks with rigid insulation.

For large projects and or long panels standing seam metal roofing. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Metal building roof purlins provide three structural functions.

Purlins are 2 by 4 feet and are installed much like metal roofing. First the purlins support the roof. Purlins are installed horizontally under metal roofs. Secondly purlins tie the rafters together stabilizing and strengthening the structure s rigid framing.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. Purlins are 2 by 4 feet and are installed much like metal roofing.