Homebild-Do you work for an OSB manufacturer?
You guys may be comparing apples and oranges a bit here. keep in mind that there are 2 grades of plywood (interior /exterior). OSB has different types of grades depending on usage.
I think most would agree that if the usage is for an area that may sustain more than one month of periodic rain/wetness before being able to be 'roofed' over or vapor barriered, that plywood is much better in general.
For example, OSB floor edges will turn up if it stays wet for longer than a month, whereas plywood would take a lot longer. Obviously depends on how often it rains and how wet it stays. Some builders are notorious slow and behind the gun and cut corners.
Homebild, BTW, most OSB that builders use has LESS sheer and lateral strength than plywood. Keep in mind that tobacco companies told folks smoking was safe and didn't cause cancer either.
And while you 'builders' sit and crow about years of experience, mull over this information is coming from a retiring PhD Structural Engineer with 40 years "experience" with copious laboratory/field testing experience.
OSB is almost always used because it's cheaper, not because it gives superior structural support over plywood. Give it a rest folks. |
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