What Pat Said.
The stuff I was thinking of was called Advantech Subfloor (Knew the synapses would kick in eventually). They have the appearance of OSB sheets, but the waterproof-ness of ACQ Pressure treated wood. The stuff makes PT plywood look light though. It's a beast to move. Workability is about the same as PT, and durability is very high. It behaves like PT plywood with the appearance of OSB, and is heavier than either.
You may have to call around to find a distributor. I don't know if Home Depot carries it.
Here is the supplier's website. Apparently it comes with a 50 year warranty, but I bet that is for interior installations. http://www.advantechperforms.com/advantech-advantage/moisture-resistance.aspx
The stuff I was thinking of was called Advantech Subfloor (Knew the synapses would kick in eventually). They have the appearance of OSB sheets, but the waterproof-ness of ACQ Pressure treated wood. The stuff makes PT plywood look light though. It's a beast to move. Workability is about the same as PT, and durability is very high. It behaves like PT plywood with the appearance of OSB, and is heavier than either.
You may have to call around to find a distributor. I don't know if Home Depot carries it.
Here is the supplier's website. Apparently it comes with a 50 year warranty, but I bet that is for interior installations. http://www.advantechperforms.com/advantech-advantage/moisture-resistance.aspx
