Which side of OSB board goes out?

Which side of OSB board goes out?

wall sheathing (OSB) with the smooth side out (the grade stamp side out). I’ve always done it the rough side and nail lines out. His theory is that the smooth side has a wax coating that sheds water more effectively.

Which way is OSB stronger?

If you look carefully at the sheet of OSB in question, you’ll see that most of the fibers are oriented parallel with the length of the sheet, making that the strongest axis in bending.

What are the lines on OSB for?

OSB has its advantages. Some panels have a textured surface, which makes them less slippery when used for roof sheathing. OSB panels often have lines at 16- and 24-in. intervals so you know where underlying studs, rafters and joists are for nailing.

Which side of plywood goes down?

“This side down” applies to when it’s used as subflooring. That side should be facing down, against the joists. When used as wall sheathing, that side should be against the studs.

Should wall sheathing be installed vertically or horizontally?

If the height of a wall is less than 8-feet, install the plywood (or OSB) vertically. If the height of a wall is greater then 8-feet, install the plywood (or OSB) horizontally.

Should sheathing be horizontal or vertical?

On roofs and floors, sheathing is installed perpendicular to supports because this is the orientation that results in the strongest roof or floor. Wind loads perpendicular to a wall are similar to floor and roof loads, and installing sheathing horizontally makes walls better at resisting wind pressure.

Does grain direction matter with plywood?

Plywood with an odd number of plies starts with a central core ply with the grain oriented according to the total number of plies. As a point of fact, this plywood may actually be stronger across its face grain direction than with its face grain direction. And the reason has to do with the thickness of the face plies.

Which side of sheathing goes out?

When installing in vertical applications such as wall sheathing, you’ll want to orient the smooth or stamped side facing out. The smooth side has a better moisture resistance and will ultimately provide better performance against weather.

Why is there OSB behind my drywall?

4 Answers. That is probably what’s called a shear wall. It’s laterally structural to support the building’s side-to-side forces. Penetrations in your shear wall must adhere to different restrictions than other walls and you may need to consult an engineer to verify.

Is there a right side up for plywood?

Install plywood underlayment smooth side up. To avoid damage to the surface, install underlayment immediately before laying the finish flooring.

What to consider when buying OSB sheathing?

Before buying, OSB sheathing, here are some things to consider. Understanding the composition of the OSB sheathing is the key to understanding the effectiveness of using the material. To understand it better, it is best to compare it with traditional plywood.

Is OSB a safe building material?

As the only truly renewable building material, wood is increasing its reserves every year. OSB uses selectively prepared new wood strands during its manufacturing process and is recyclable into other products. The fiber for OSB is grown in sustainable forests and tree farms. OSB is safe to use.

What is the best sheathing for exterior walls?

Plywood is the best underlayment material for wall sheathing. Oak, walnut, birch and maple are some of the prime sources of hardwood plywood. Hardwood plywood is the best material for wall sheathing.

What thickness of OSB should be used for roofing?

For OSB, NRCA recommends using a minimum 15/32 inch thick or 1/2 inch nominal exterior-grade OSB for 16-inch rafter spacings. Caution should be exercised when roof decks are constructed out of the following materials: