Can you paint smooth side of OSB?

For interior uses the OSB should be smooth side out. The reason it is textured on one side is for roofing purposes and states to install with that side up. Seal both sides of the OSB and the joints with a quality waterproofing primer. Paint the OSB with two coats of a premium exterior topcoat.

What kind of paint do you use on OSB?

Acrylic Latex Primers If your OSB panels are used indoors, an acrylic latex primer will be an ideal base coat because it’s so easy to work with. Latex primers are fast-drying, so they can be painted over in as little as an hour. They are nearly odor-free and do not contribute to indoor air pollution.

Does OSB go rough side out?

Structurally it doesn’t matter but the rough side goes out. Rough side has the nailing lines printed on it and the grade stamp is on the smooth side so it can be seen from the interior.

Can you paint over OSB?

It is also difficult to paint OSB surfaces. These boards can be painted, but this will cause some issues. First, it will not have a smooth texture, no matter how hard you sand it. You may also need to use more than two coats since the open strands will quickly absorb paint.

What side of OSB should face up?

“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.

Which side of OSB flooring goes up?

“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 I paint OSB?

Using oil-based paint is essential. Just painting the OSB like you would paint plywood will leave the OSB rougher and the paint will bleed through regular primer, while using water-based paint causes the OSB to peel over time, making it look unattractive and requiring regular maintenance.

Why does OSB board say this side down?

Does Weyerhaeuser OSB floor sheathing have an up and down face? The side with the grade stamps is intended to be installed down to allow for the stamps to be visible from an unfinished lower level.

What kind of paint to use on OSB?

Just painting the OSB like you would paint plywood will leave the OSB rougher and the paint will bleed through regular primer, while using water-based paint causes the OSB to peel over time, making it look unattractive and requiring regular maintenance. Apply a top coat of oil-based paint in the color of your choice and allow it to dry.

What’s the difference between rough and smooth OSB?

A fella I work with installs his ext. 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. I say hogwash.

What are the limitations of painting OSB board?

Limitations When Painting OSB While the color will be solid and complete with enough coats, the texture will always remain visible. You cannot achieve a smooth surface on OSB. Because OSB does not sand down smoothly, you will not be able to bring down the texture with sanding after painting.

Why do people use OSB instead of plywood?

Many people prefer OSB to plywood or other alternatives as it is easy to remove and screw into, as well as more environment-friendly. It’s formed by layering strands of wood, which forms a variegated surface making it hard and frustrating to paint properly.

What can I use to smooth out the edges of an OSB board?

If you want to smooth out the edges, use the same method as detailed above: using resin filler, then sanding. With 220-grit sandpaper fitted on the orbital sander, lightly sand the surface of the OSB. Do not sand the edges. Thoroughly clean the surface of the OSB.