How To Install Metal Roofing Over Osb

Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. This particular contractor happens to admit to sheathing over 90 percent of all of the post frame buildings he has put up in 7 16 osb oriented strand board beneath the steel roofing and siding. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

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Metal roofing screws need to go into framing.

How to install metal roofing over osb.

Overlap the edge of the roof by 1 inch. You will use metal roofing screws to secure the metal panels to the sheathing. Install the roofing screws vertically along each rib in the panel. Begin on the left side of the roof working to the right.

Secure the metal panel to the deck by drilling 1 1 2 inch galvanized metal screws through the peak of the rib in 12 inch to 16 inch intervals. Next use 1 inch nails to secure some metal edging to the perimeter of the roof. Install the first metal panel on the low end of the roof square to the eave. In the case above the shear forces in the last 12 foot bay at each end of the roof have had osb placed between the roof purlins and the steel roofing.

Moreover try to ensure that the screws are all aligned evenly. Work toward the ridge. Then cover the entire roof with a layer of insulation and secure it with a staple gun. And for any exposed fasteners try to avoid over tightening them.

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. Metal roofing roofing answers roofing installation roofing materials oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. Case in point one of our recent clients in colorado has hired a building contractor to erect his building. In order to avoid a hump at the transition from two layers of materials to one the notation on the building plans advises to lower the roof purlins in these areas by 7 16.

Try to space the screws about 12 inches apart down the entire piece of metal. April 3 2017 filed under. A potentially easier option is to use purlins on top of the rafters rather than framing between the rafters. Before you install metal roofing repair any damage to the wood under the shingles.

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