Installation details shall conform to Sections 2304.7.1 and 2304.7.2 for floor and roof sheathing, respectively. Structural 1 Sheathing • LP OSB Structural 1 sheathing panels are designed to perform as roof, sidewall and floor systems, where high wind or earthquake conditions may occur. OSB will have more "give" in it than plywood. The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. Sheathing Type Typically, 15/32-inch or thicker panels are required in high-wind areas. You may contact LP at 1-800-648-6893. These are plywood and OSB (oriented strand board) boards commonly used for sheathing walls, roofs, and decks. The roof consists of : top and bottom sill plate, face plate, 9 - 4x4 treated posts for support, 2x10x12 joist every 16" on center with a 2x4x12 wedged to allow for slope of 1 3/4" per 12 foot side, 5/8" osb, roof felt, tar, and rolled roofing. I build custom homes that required quality and that is what I use. Never attach roof sheathing with staples; 8d ring-shank nails should be used instead. Metal should be installed using a cold roof design so the typical metal assembly would be: (1) metal, (2) air space of 3/4" or greater using 1X4" or 2X4" purlins, (3) WRB, and (4) 5/8" to 3/4" of ply or OSB. A structure's roof truss spacing can vary from every 12 to 24 inches. at roof corners, edges, and ridge lines. Features. n Improved fasteners such as ring shank nails increase the uplift resistance of the roof sheathing. Protecting your roof during construction with enhanced OSB panels can save you valuable time and money when you need it most. Keep in mind that the load of the roof still plays a role in the plywood thickness. Plywood is a bit more expensive, but is usually stronger and is often selected in cases where the roof covering is heavier, such as for slate, clay, or concrete tile roofs. Rafters that are slightly farther apart might require ½ inch or 5/8-inch-thick plywood. OSB is lightweight, relatively inexpensive, and strong enough to resist bending or breaking should someone walk on the roof. I've never used commodity OSB on a roof but it's probably fine in 5/8" thickness, and possibly in 1/2" thickness. OSB comes in 4-by-8-foot sheets, as does plywood, but the manufacturing process allows the production of longer and wider ones. Rated sheathing, also known as CDX in the trade; For use in general construction; Exposure 1 rated panel can withstand inclement weather during construction delays but is not intended for extended exposure to the elements; The thickness required by Josh’s circumstances are good for roof snow loads of up to 70 psf (again spanning 24”). For the curious – 7/16” OSB has a span rating of 24/16 and with supports every 24 inches is good for a roof live load of 40 psf (pounds per square foot) with a 10 psf dead load. through 2c apply to APA Rated OSB Sheathing, APA Rated OSB Structural I Sheathing, and APA Rated OSB Sturd-I-Floor respectively. Find the Area of a Roof. OSB sheathing success relies on proper installation and there are a number of strategies to follow to minimize call backs and to ensure that your build enjoys longevity and aesthetic appeal. n The highest uplift forces occur at roof corners, edges, and ridge lines. When the grade stamp is covered by roofing, the building inspector will not be able to confirm that the correct OSB roofing panel was used. Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood. For SI: 1 inch = 25.4 mm. Both types of reconstituted wood panels come in different sizes and thicknesses. Estimated panel weight. H-clips provide additional stiffness between bearing points for the unsupported edges of wood panel (plywood or OSB) roof sheathing, along with the necessary 1/8” gap for expansion, as shown below illustrated on a bag of Simpson H-clips. Roof sheathing comes in grid-marked 4-by-8-foot sheets, and should be installed perpendicular to the frame. The OSB board got wet after one significant rainstorm before the shingles were able to be put on. Boards used for sheathing range from those with a 4-inch face to 48-inch-long plywood sheets. Provides high … Oriented strand board (OSB) is commonly used as the primary structural ... similar information for OSB used as wall and roof sheathing. While OSB (Oriented Strand Board) is generally cheaper than plywood, it is heavier and not as stiff as plywood and can result in soft squeaky floors under weight.The biggest complaint against OSB is that it doesn't handle moisture very well so it is more suited for indoor use. Oriented Strand Board (OSB) or plywood can be • Improved fasteners such as ring shank nails increase the uplift resistance of the roof sheathing. Our varied selection of building supplies include engineered wood products suitable for subfloors and underlay structures. Provides dimensional stability and stiffness for wall and roof sheathing needs Engineered product with no knots, splits or other defects that might impact panel performance Strong and uniform consistency throughout ... Home > Panels Subfloor > OSB > 4X8-5/8" T&G OSB UNDERLAYMENT. The typical thickness range for sheathing is 3/8 to 3/4 inch. OSB is manufactured in a slightly different range of thicknesses than plywood. Voluntary Product Standard PS2. girlbuilder | Jan 20, 2007 08:32am | #98. Section 4 ... 19/32, 5/8, 11/16, 23/32, 3/4, 7/8, 1, and 1-1/8 inch. For a roof varies on multiple factors, such as board face width, and... 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