Roof sheathing which side up

Yes Russell… That is exactly what the manufacturer said Norbord. See post two up from yours. Good link! As previously stated, building inspectors want to be able to look up and see the stamps, the other reason is there is a special coating on the non stamped side that is suppose to be water proof sealer. Feel Free to look at the www.

Reversing the "This Side Down" is not a structural issue, it however can be a problem if the inspector can not see the stamps after installation. The rough side is an industry "requirement" and is only there to prevent some of the potential for a slick panel. The slope and weather conditions play a much bigger role than the rough surface. North American producers are the only ones that make a rough surface, so if you see any European or S.

American panels used they will not have a rough surface. Note that plywood has never had a rough surface. The screened surface also provides a little more traction for construction workers during installation.

The same goes for wall sheathing and flooring panels; always install with the grade stamp up so that inspectors can do their jobs easily. The strength axis is usually the long direction of the panel but the grade stamp will indicate it. 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.

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. It is important to rely on the stamping on OSB as a guide during installation. This is mostly for roofers so that they lay the smooth side down and can stand on the rough side facing up.

The most common uses are as sheathing in walls, flooring, and roof decking. Is OSB directional? OSB stands for Oriented Strand Board and that means the wood strands are laid up so one direction is stronger than the other; the same way plywood is. That means you have the weak direction carrying the loads it is not designed to.

Should wall sheathing be staggered? Long edge of panels installed horizontally across supports and each succeeding course NOT staggered. How long has OSB been around?

Oriented strand board was created in the late s as inventors extended the use of waferboard. It differs from other wood-scrap products because its long strips of wood are placed strategically rather than randomly. Is Country Ham ready to eat? What is internal and external criticism of historical sources?