![]() ![]() Other metals and materials may be incompatible also so keep this in mind when choosing your battens.Īnd you can always call on the helpful experts at No.1 Roofing and Building Supplies when you need some reliable advice. ![]() It’s important that you avoid contact between metal roof battens and copper.Ĭopper may be present in hot water overflow piping or downpipes and even the water flowing from this copper could cause serious corrosion issues for your metal roof battens or roof cladding. Most steel battens have a convenient groove on the bottom flange to make inserting screws a simple non-slip process. When attaching metal roof battens to the supports pairs of screws should be in line with each other and the supporting rafter. ![]() M5.5 x 40mm batten zips are usually the minimum fixing size for attaching steel roofing battens to steel beams and supports. This is extremely important because using the wrong fasteners may lead to roof failure.įor example it might appear that using 75mm nails to attach a 35mm batten to a rafter would be sufficient.īut according to the table in AS 1684.2-2010 this is insufficient for battens at 900mm centres in a N1 wind speed area.Īvoid any contact between CCA treated timber and steel roofing as this can lead to discolouration and may void the warranty.Ī 12 x 40mm timber fixing screw through each flange is the minimum fixing size for fixing steel battens to timber. Plan your batten layout so that joined battens are staggered across the roof. While the manufacturer determines the metal panel width, the length depends upon the ridge-to-eave measurement. The common spacing for the rafters used in metal roofing is 16 or 24 in the center. When joins are necessary in timber battens ensure that the join meets over a rafter or truss. Rafter Spacing for Metal Roofs Metal roofing for houses commonly uses aluminum or steel sheets. Specific tie-downs may be required for attaching battens to support structures in high wind areas.įixing timber battens to timber supports: Your choice here will depend on your roof design and choice of roofing materials as well as what you’re trying to achieve.įor example if you have a roof cavity where you can install thermal insulation then your main focus for using foil backed blanket type products will be to reduce condensation and create a vapour barrier under the roof. There is a wide range of insulation blankets and reflective type sarking available for metal roofing. If you’re laying tiles you’ll probably need to lay sarking or underlay on the roof with the reflective side facing down before you attach your battens. ![]()
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