Panels should be kept in storage or under cover until installed. Storage on the job site should be covered and well off the ground.
Standing water on an installed sub-floor should be removed ASAP by sweeping or with a squeegee. After the sub-floor has completely dried, sand any areas of concern. Do not install finished flooring until the HVAC system has acclimatized the home.
1. Build platform of cull panel and scrap lumber 4x4s for stacking panels.
Stretch plastic film over platform to block passage of ground moisture.
2. Nail film to top panel and drape over ends for protection against driving rain.
Weight lower end with 2×4.
3. Lay two 2x4s on top of stack.
Pad corners with rags.
Stretch film over stack and secure to tie-down stakes.