I Fully waterproof bond and designed for applications where construction delays may be expected. Exposure 2 Intended for protected construction applications Will shrink or swell with changes in humidity or water. Designed to compete against commodity plywood in strength, stiffness and durability. A three-layer panel has a wood fiber core and a veneer face and back. A five-layer panel also has a veneer crossband in the center.
Structural performance are equivalent.
Share same exposure durability ratings. Applications the same for each. Longer exposure to water more chance of rot and decay. Permanent exposure apllications. Because of poor nail holding power.