This plywood is made with A+ grade timber and offers a very good range and quality to their customers. This waterproof plywood goes under 5 stages of manufacturing process to make it water-proof and borer resistant. Waterproof plywood is a moisture resistant material that many people use for various purposes in their home. It is great for outdoor usage, as it is resistant to various weather conditions, such as rain, sleet, snow, etc. It also works great for subfloors (levels underneath the "actual" floor), since it can keep moisture from the ground out of the floor.