![]() ![]() Midwest Manufacturing specifies 75 screws per square of metal roofing.Fabral roofing specifies 80 galvanized screws per square of steel material, for aluminum material, use stainless steel screws.We give more detail in after introducing the wind speed topic: Here are two common examples of metal fastener spacing for exposed fastener metal roofs. But that does not give the spacing distance between the fasteners along the structural member - that's what you must be asking. Typically the sheet is fastened to every structural member (purlin, rafter, truss, etc). and Dimond in New Zealand) give installation specifications for their product including screw fastener spacing schedules (and other data such as unsupported spans, unsupported overhang, and different fastener types). Roofing manufacturers (such as Fabral in the U.S. In a high wind area, how far apart should the screw lines be and how many screws should be in a row? Reply: Fastener Screw Spacing Distances for Metal Roofing Reader Question: (Sept 18, 2014) Jim said: ![]() While the church itself is not currently in use the congregation still meets nearby.] Cuthberts church, built in 1874, was severely damaged in recent Christchurch area earthquakes. Cuthbert's church in the Port Hills area above Christchurch, New Zealand, you can see fasteners in every other rib of this exposed fastener roof.Īt below right you can see the fastener schedule for roofing panel edges along the roof valley. Where purlins are used in roof structure construction in this area, for wind damage protection a fastener may be installed on every other raised rib along the roof's eaves.īelow : two photographs of an older exposed metal fastener roof on St. But notice the closer fastener spacing on the roof's hips. Exposed Fastener Metal Roofing Fastener Spacing Schedules & Tables vs Wind LoadĪt above left: a diagonal patterned, minimally-fastened exposed metal fastener roof panel system in the field of the roof on a building in Akaroa, New Zealand. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Our page top photo illustrates the fasteners on an exposed fastener metal roof installed in Hamner Springs, New Zealand. Because this roofing material is also sometimes used on residential buildings, homeowners and home inspectors should also review this material when diagnosing roof problems. This article series explains the selection, applicability, and installation specifications for exposed fastener metal roof systems, also referred to as barn roofing, or agricultural building roof systems. We include a discussion of the requirement for use of a greater number of metal roof fasteners in high wind zones and we give an example schedule of the number of screws recommended for metal roofs at various wind speeds or wind zones. This article describes the fastener screw or nail schedule for several types of exposed fastener metal roof systems, citing manufacturers' installation manuals and guidelines. Spacing recommendations for exposed fastener metal roof systems: We have no relationship with advertisers, products, or services discussed at this website. ![]() InspectAPedia tolerates no conflicts of interest. ![]()
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