Metal Roof Over Osb

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.

Metal roof over osb.

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. However the board is lack of natural moisture inside and won t dry as quickly as plywood. Install the first metal panel on the low end of the roof square to the eave. April 3 2017 filed under.

As the result they are stronger and basically water proof. When they are used in roofing osb can retain heat and water perfectly. Snap a vertical chalk line 1 4 inch from the rake edge of the roof using a chalk box. Install the roofing screws vertically along each rib in the panel.

Osb is widely used as roof decking material. Wind can get under these roofs. When the steel roofing can t carry the load other shear carrying materials such as 7 16 osb may be added to the assembly. 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.

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. 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. For the roof we are hanging 2x6 in metal hangers and will screw the metal siding into them. Begin on the left side of the roof working to the right.

Metal roofing screws need to go into framing. Unlike a house. Ensure that the line is square with the eave. Osb is made out of strands of wood chips and chemically engineered materials to glue them together.

And i am tired of taking chances. We are skipping the osb on the walls and the roof all together.