I have only seen people use that on prefab walls and vaulted ceilings. Seems like it would be an expensive hassle on a floor.
I have laid miles of OSB subfloors in homes, it works it is cheap. But it gets wet an it is trash.
The top of OSB has a film that will protect it from a little water, basically if it rains or snows before you cover the house being built it will fare ok. More then a few weeks of rain and snow it is risky. I have seen jobs that ran out of money and sat for months all the OSB became ruined..
On jobsite you will see scrap pieces of OSB in a puddle of water for as little as a day and they will just soak up the water like a sponge, once they dry out they crumble like a handful of leaves.
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