Osb which side goes out

The rough side provides safety for the workers at the jobsite. Contractors working on a sloped roof will rely on the roughness of the board for traction when working. This is especially true when you have OSB that has been treated with a sealant or moisture barrier. Moisture resistant resins can create even more slippery surfaces. It is important to use the rough side for traction when working with OSB. 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. In addition to safe orientation, the stamping will also face in a convenient direction for an inspector to see. The inspector can then see the stamped information more easily. In the case of an OSB sub-floor, the OSB will likely be covered by hardwood or carpet, making it difficult to find the material information from the same floor.

Instead they can view it from a basement or lower floor where the ceiling may be left unfinished and have the OSB exposed. The rough side has lines on it. I didn't know if one side primes, paints, and looks better? It's for a woodworking shop so the texture gives it character.

I put mine up, smooth side out. I know OSB sucks up alot of primer and paint on the smooth side, I can't imagine how much more the rough side would use. Boyd Well-known member. Click to expand SteveCh Well-known member.

Joined Dec 21, Messages I have found that painting OSB is easier on the smoother side. Especially if one is brushing the paint on. Haven't tried spraying, though. The Cobbler Super Moderator Staff member. MScott Well-known member. The smooth side has some writing stamped on it not as much as the other side with all the lines though.

Do you guys or gals sand this off before painting or use a sealer such as Kilz before priming and painting? I am just starting to put up OSB and wondered how much the writing would bleed through. Joined Aug 6, Messages Location Illinois. I would put the rough side where I intend to walk on it. Just my opinion, painting osb yields a shitty looking deal no matter which side you use.

It's an underlayment never really intended for a finish coat, the garages I've seen painted, well they just look bad. If you are using osb, leave it natural, don't waste time and materials painting it at all.

We just did our barns tack room in OSB. It ends up looking like finished concrete. Great to work with easy to handle and cut but a pain to paint. Somebody told me the way to do this stuff right back in June. You need to prime it in Zisners oil base primer. This is nasty oil based stuff that brought back memories of ugly cleanups. I just tossed the roller after, way too much head ache and thinner to bother with. After that dried next day it got painted with regular exterior latex.

Be very careful on hip roofs along the hip to make sure the strength axis does not mistakenly get parallel to the supports as that may result in the panel exceeding the maximum span allowed for that thickness.

Sagging may result if panels are installed incorrectly. Get all the latest news and industry tips straight from West Fraser delivered to your email. We won't send you spam and only send at most two updates per month. Your privacy is important to us; your email will remain confidential and will not be shared with any other parties. Search Search.