1x4 Board Spacing Under Metal Roof

Installing wood stripping under a tin roof.

1x4 board spacing under metal roof.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Wider panels allow for greater spacing between rafters. However the screw placement diagrams commonly are based on the on center spacing center to center of the purlin. The roofing is manufactured in panels that.

Let s take a look at the most common types of metal roofs for houses. 5 4 x 4 slats are acceptable decking still not if just 4 oc supported 24 oc if hitting nail penetrations full 1 nail penetration into 2 x structure stock on panel sides. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles. Do all roofing projects require purlins.

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. We do recommend it however. 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. To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel.

An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing. When putting on a metal roof how far apart do you space the furring strips. 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. Allowable gap between firring strips relates to the ability of the roofing material to resist buckling or crumpling under snow wind or walking loads.

The spacing of your purlins depends on the expected snow and wind load. 2x4 s on flat 24 oc is what scott s pdf said as a minimum even if overlay on existing decking and old roof covering.