Osb Over Existing Sheet Metal Roof

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Ideas Metal Seam Roof Details Roofing Decoration Intended For Dimensions 1050 X 1200 Standing Seam Metal Roof Metal Roof Construction Metal Roof

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Related Image Standing Seam Metal Roof Metal Roof Construction Metal Roof

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Roof Layers Exploded View Hurricane Ties To Attach To Lb Joists And Ridge Beam Metal Roof Rigid Foam Insulation Roof Design

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For Steel Shed Can Insulate Cover With Plywood Steel Sheds Garage Interior Osb Sheathing

Open spaces form between the once tightly fitted.

Osb over existing sheet metal roof. When the steel roofing can t carry the load other shear carrying materials such as 7 16 osb may be added to the assembly. 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. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. Avoid butting osb panels tightly leave a 3 mm 1 8 inch gap between the osb panels to allow for expansion.

Osb is widely used as roof decking material. Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. 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. Stagger the panels over the roof with 2 supports between panel ends.

If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Place corner pieces where panels will meet bends at the edge of the roofing. A homeowner recently wrote and asked me the following regarding osb roof decking. 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.

3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof. 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. Today a shiplap roof is usually 60 years old. Roof trusses must be dry when sheathing a roof with osb to prevent mold growth in the roof and coverage gaps as the trusses dry and shrink.

After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood. Why re sheet over shiplap. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle.

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Firewood Shed 1001 Pallets Pallet Shed Pallet Diy Firewood Shed

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Osb Ladders And Metal Roofing Build A Workshop 12 Modern Roofing Roof Design Roof Styles

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