What is the spacing for roof battens?

Each product has different requirements, for example, batten spacing for (0.42BMT) corrugated metal roofing needs to be no more than 1100 mm apart, but batten spacing for 0.48BMT metal roofing can be up to 1600 mm apart.

What type of roof would use purlins?

Purlin is a horizontal beam or bar used for structural support in structures, most often below the roof. Purlins are supported either by the building’s rafters or its walls. These are most commonly used in metal buildings, but in wood-frame structures, these also replace closely packed rafters.

Do you need purlins on a roof?

Do all roofing projects require purlins? No. We do recommend it, however.

What kind of roofing can be used on purlins?

The photo above shows battens at a tile roof installation in progress. Some types of roofs, such as 5V-crimp metal, were once allowed to be installed directly onto purlins, as shown in the photo below, looking up at the metal roofing from the attic.

How are girts and purlins used in a building?

They are one directional and bolt downhill of the clip. Opposite of purlins and roofs, girts are used on walls. Also, in the shape of a “Z”, a girt is a horizontal structural member that is attached to sidewall or end wall columns and supports paneling. They can be bolted to the top or bottom of a clip.

What’s the difference between a batten and a purlin?

The two words are often used interchangeably and both are long strips, usually wood, used for the attachment of roofing material. But a “purlin” is applied directly onto the roof rafters, running perpendicular between them, while a “batten” is nailed to roof sheathing or applied over an existing roof for installation of a new roof.

What’s the difference between purlin, girts and eave struts?

Let’s talk about the differences with purlins, girts and eave struts so you can help make better sense of what is what on your metal building. Purlins are specific to the roof. In the shape of a “Z”, a purlin is a horizontal structural member that supports roof covering and carries loads to the primary frame.