How to lay hardwood Maple 2 1/4 inch to allow for expansion
We live in Tennessee where it can be quite humid in the spring and summer. We are laying 3/4 inch hardwood maple strip (2 1/4 inches wide). The manufacturer is Bruce.
1. Since we are laying it in the winter when it is dryer, how do we lay the wood so that it won't cup or buckle in the summer when it is more humid? The manufacturer's instructions talk about using washer rows every 10 to 20 rows but do not specify the size of washers. Bruce installation line was not able to provide any additional information.
The Bruce installation line did say that 3/4 inch around the perimeter is required and that a subfloor would need to be installed if the existing subfloor is not tongue and grove.
2. Is 3/4 inch perimeter necessary or can we go with 1/2 inch so we do not have to use quarter round with our baseboards?
3. Does the subfloor, which is OSB by Advantech, really need to have tongue and grove in order to be a stable subfloor for hardwood?