OSB panels are available in a variety of thicknesses and sizes. They are manufactured in both imperial and metric sizes, and are either square-edged or tongue-and-grooved on the long edges for panels 15 mm (19/32”) or thicker. The most common panel size is 1220 x 2440 mm (4 x 8 ft).

What sizes do OSB boards come in?

OSB panels manufactured in North America are typically 4 x 8 feet in size. Metric panel sizes are also available from some manufacturers in 1.25 x 2.50 meters. Panels for use as exterior siding are also available in narrow lap widths of 6 inches (152 mm) or 8 inches (203 mm) and 16-foot (4.88 m) lengths.

What does 24 16 mean in the grade stamp on a sheet of OSB?

The span rating on SHEATHING SPAN panels appears as two numbers separated by a slash (e.g., 32/16 or 48/24). The first number is the maximum on center (o.c.) support spacing in inches for roof sheathing. The second number is the maximum o.c. support spacing when the panel is used for subflooring.

What is the thickest OSB board?

Wood Products For decades, 23/32″-thick OSB has been the most commonly used thickness of OSB subflooring. But a simple switch to 7/8″ panels offers several advantages for accommodating a home’s energy efficiency and for ensuring the performance of finish materials and the overall feel of the floor.

What thickness OSB do I need?

The thickness of OSB that you need varies on where it is used in a building. Typically 3/4″(18mm) for floors and 3/8″ (9mm) for walls and 1/2″ (11mm) roof. Also make sure that you get your supporting timbers at the correct spacing.

Is 7/16 OSB OK for roofing?

Standard types of wood designed for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. Sheets of 7/16-inch thick, without edge support, can be used in an area where the snow load is 30 pounds per square foot.

Do you nail or screw OSB board?

Tools for Hanging OSB A hammer and 8d nails are standard for installing OSB, but you can speed up the installation by using a nail gun. … If the force of the nail gun is too strong, the head of the nail can penetrate the OSB, which reduces the nail’s holding power.

How thick should my OSB subfloor be?

The minimum thickness of plywood for subflooring is about 5/8 inch. Since it does not hold fasteners as well as plywood, OSB must be a little thicker, or at least 23/32 inch.

What size OSB should be on exterior wall?

OSB used for wall sheathing should be 7/16 inch thick.

Is OSB cheaper than plywood?

OSB is less expensive than plywood. To build a typical 2,400-square foot home, OSB may cost $700 less than plywood. OSB is considered by many to be a “green” building material because it can be made from smaller-diameter trees, such as poplars, that are often farmed.

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What is 19 32 OSB used for?

Shop OSB 19/32 Rated Sheathing OSB is a material with favorable mechanical properties that make it particularly suitable for load-bearing applications in construction. It is now more popular than plywood in the structural panel market. The most common uses are as sheathing in walls, flooring, and roof decking.

What side of OSB should face up?

OSB roof panels should always be installed with the grade stamp facing into the attic and the screened surface (with the nail guide lines) facing up.

Should OSB be installed vertically or horizontally?

Wind loads perpendicular to a wall are similar to floor and roof loads, and installing sheathing horizontally makes walls better at resisting wind pressure. It is always installed vertically as it has tendancy to wrap width wise and strength along longitudinal direction is more.

What size OSB do you use for a roof?

Typical types of wood used for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. Sheets of 7/16-inch thick, with no edge support, can be used in an area where the snow load is 30 pounds per square foot. With edge support and the same snow load, 3/8-inch OSB can be used.

Can I use OSB for interior garage walls?

OSB is a effective sheathing material for garage walls. It’s strong and durable, and it can be used as a base for nailing or stapling insulation to garage walls. OSB can be left uncovered for utilitarian bare-wall constructions, but can be primed and painted.

Is OSB stronger in one direction?

1 Answer. No. OSB can be laid in any orientation and will have the same strength as long as it begins and ends on a stud/joist.

What does GRK screws stand for?

oK – stupid question – whats GRK stand for? Green River Killer. BUIC Sep 01, 2007 02:55pm #16. GRK is a brand of high quality screws.

Does OSB board warp?

When properly installed, OSB is a durable and versatile material. When it takes on moisture and begins to warp however, OSB changes permanently. Not only does it permanently change shape, but its structural strength and permeability change as well.

Is OSB or plywood better for roof sheathing?

Plywood Holds the Moisture Advantage Over OSB When plywood gets wet, it tends to swell. … OSB takes longer than plywood to get saturated, but also takes much longer to dry out. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks.

What's better plywood or OSB?

Osb is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood. This is one of the reasons osb is used for webs of wooden I-joists.

Why does OSB say this side down?

OSB also has stamping that reads “This Side Down”. This directs the worker on the correct orientation of the board when installing. The side with the stamp is the smoother side. When installed smooth side down, the rough surface will then face up and give the worker traction for safety.

Can you use OSB as exterior sheathing?

Many people prefer using OSB as an alternative to other siding materials such as metal or vinyl, which aren’t as strong or durable. OSB does have its downfall: moisture is its enemy. … Measure the thickness of the OSB currently on the exterior of your home. OSB ranges in thickness from 7/16 inch to 1/2 inch thick.

What thickness OSB for Shed?

For an inexpensive, value option 9mm OSB can be used for your garden shed roof.

What is code for exterior wall sheathing?

Wall sheathing on the outside of exterior walls, including gables, and the connection of the sheathing to framing shall be designed in accordance with the general provisions of this code and shall be capable of resisting wind pressures in accordance with Section 1609.

Is it better to use OSB or plywood for subfloor?

The National Tile Contractors Association and the Resilient Floor Covering Institute both recommend plywood for subflooring and underlayment, because it doesn’t have the risk of swollen edges that OSB does. Plywood also has a slight advantage in stiffness, which means that subflooring panels need not be quite as thick.

Can 1/2 OSB be used for subfloor?

A plywood subfloor generally uses 1/2-inch to 3/4-inch-thick sheets of plywood that have one rough side (which faces down) and one smooth side, which faces up. The sheets are generally 4 x 8 or 4 x 12 feet in size.

Can you use 7/16 OSB subfloor?

Oriented Strand Board OSB can be used for subfloors, although it is not as common as CDX.

Why is 7/16 OSB so expensive?

Building material suppliers have to have 7/16 OSB to sell to customers, so many of them contract the product from mills. That means they are obligated to buy it regardless of current pricing. As they bought product at the higher prices, they were forced to raise their retail price to keep from losing money.

Which is stronger OSB or plywood?

OSB and plywood offer similar (and sufficient) performance in terms of strength and functionality, though plywood is about 7% stronger. … Plywood will absorb moisture quicker than OSB, but consequently it will also dry quicker.

Can you waterproof OSB?

OSB is strong and water-resistant. Every single fiber or piece of wood in an OSB is saturated with a cocktail of resins designed to provide superior strength and waterproofing to the finished product. … This type of board is an excellent material for use in waterproofing systems, be they roof, sub-floor or wall.

What size is blue edge OSB?

Blue Ribbon 7/16-in x 4-ft x 9-ft OSB Sheathing.