Metal Roof Directly On Rafters

It is important to.

Metal roof directly on rafters.

While decking is not required for a metal roof and is often not used for shops barns or other outbuildings if a metal roof is being put onto a home or a garage the use of decking is common. The products and technology used so successfully in metal web joists for floor construction can also be employed for metal web rafters in a trussed roof design. Put on your safety equipment including gloves safety goggles and the roofer s harness. I guess at 14x16 you won t be towing this one but the wind still blows and osb does not have adequate holding power to resist the wind trying to rip the metal roof sheeting off.

Sheathing over the rafters is a structural component and when not used just a metal roof cross bracing may be necessary as the metal does not provide enough. Brace the ladder securely. How to install a metal roof over open rafters step 1. Being just a 12 patio cover may require less but you don t want that metal blowing away.

The depth of the metal web rafters also creates deep insulation voids to maximise the thermal efficiency of the roof and the flexibility of construction allows. A potentially easier option is to use purlins on top of the rafters rather than framing between the rafters. Metal roofing screws need to go into framing. A 70 mph wind can rip things apart very easily and in some locations the winds are much stronger.

The plywood covers the entire roof and is solidly attached to the rafters providing a sturdy base for both insulation and metal roofing panels. It does create some additional work just at the edges to close between the purlins but that s much less than cutting cross. Metal web rafters also known as steel roof trusses offer the specifier and contractor unique benefits compared to other methods of roof construction.