Metal Roof Over Osb

When they are used in roofing osb can retain heat and water perfectly.

Metal roof over osb.

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. Ensure that the line is square with the eave. As the result they are stronger and basically water proof.

From the 2012 ibc international building code table 2304 6 1 over framing spaced 24 inches on center 7 16 osb fastened with 8d common nails six inches on center at the edges and in the field will support a maximum design wind speed vult of 110 mph miles per hour in exposure b or 90 mph in exposure c. Unlike a house. 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. Table 2304 7 3 gives the 7 16 osb the ability to carry a roof live load of 40 psf pounds per square foot when spanning the same 24 inches.

Wind can get under these roofs. 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. Install the roofing screws vertically along each rib in the panel. However the board is lack of natural moisture inside and won t dry as quickly as plywood.

Begin on the left side of the roof working to the right. Install the first metal panel on the low end of the roof square to the eave. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. A potentially easier option is to use purlins on top of the rafters rather than framing between the rafters.

Osb is made out of strands of wood chips and chemically engineered materials to glue them together. We are skipping the osb on the walls and the roof all together. For the roof we are hanging 2x6 in metal hangers and will screw the metal siding into them. And i am tired of taking chances.

Osb is widely used as roof decking material. Snap a vertical chalk line 1 4 inch from the rake edge of the roof using a chalk box.