So the plywood that I have is pretty thin. We got the cheapest plywood we could get because we are working on a budget. We put our planks down and put our 1" insulation in between the planks. But the insulation lays under the wood and I was not expecting the difference. I believe its only a quarter of an inch but i think the plywood is 1/4 of an inch. If we make sure the plywood is safely nailed into the planks of wood, do you think this will be fine?