Most of the world’s OSB is made in the United States and Canada in large production facilities.
Is OSB as good as plywood?
Plywood’s edges also resist damage better than OSB, which can crack and fray upon impact and over time. OSB is heavier than plywood and, when properly waterproofed and maintained, will generally lie flatter. OSB is also more consistent than plywood. Plywood is available in many plys and different levels of quality.
Another frequent question is “Could OSB be better than plywood?”.
One source argued that oSB tends to be more flexible than regular plywood. However, this doesn’t mean that OSB is inherently weaker; it just means it can be a bit bouncy. For instance, if you’re using OSB as sub flooring, you want to ensure that your floor joists aren’t too far apart; otherwise, you may end up with some bending.
Also, is OSB board as strong as plywood?
One of the biggest advantages that you get with OSB is, quite simply, that it is extremely strong. Much stronger than plywood for example. This is the reason why, over the years, it has overtaken plywood in popularity when it comes to applications such as flooring, roofing, and walling. In fact, OSB has about twice the shear strength of plywood.
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.
They call this ‘outgassing’. Interior-grade plywoods contain urea formaldehyde glues which outgas at room temperature, while the phenol formaldehyde glues used in exterior grade plywood do not. The Foundation says that many architects, therefore, specify exterior grades of ply for interior use.”.
While plywood and OSB both off-gas formaldehyde, OSB off-gasses more of the carcinogenic gas. Plywood, OSB, and other engineered wood products that contain glue can be stored outdoors for several weeks before construction so that much of the dangerous gasses are vented safely into the outdoors.
You may be wondering “How long does plywood need to be offgassed?”
For most people, exterior plywood in a build will be sufficiently offgassed by the time the building is complete. If you are extremely sensitive you should test out plywood when new, after a few weeks and after 2-3 months of airing. You should also compare that to OSB, to see which is better for your health.
The most effective way to future proof your home from plywood off gassing is to source formaldehyde-free plywood. Above: Plywood is much appreciated for its versatility. In DIY: Tiles for Commitment Phobes, Moonish of Brooklyn silk screen geometric patterns on plywood tiles.
Is there formaldehyde in old plywood?
Formaldehyde off-gasses over time and as a result, the older the plywood, the less of a health hazard it becomes. Formaldehyde in small concentrations is a normal part of our environment. The detrimental effects of formaldehyde can be mitigated by temperature, good ventiliation, and humidity control.