Re: Clueless new homeowners, conflicting advice: hardwood over plank subfloor
Bear in mind that a single, loose board will deflect more than several boards put together and fastened in place. The tounge-and-groove design will transfer some load to adjacent boards, reducing the deflection. Also, fasteners will add some measure of rigidity: as the two layers (finish floor and subfloor) deflect, the finish floor will push outward on the fasteners, while the subfloor will pull inward. The opposing forces will resist deflection. It's not much resistance, but it is some.
Originally Posted by JLMCDANIEL
It's good that the OP's subfloor planks are laid on the diagonal. While there isn't much chance of racking on the floor, it does mean that the finish floor can be laid either along either the length or the width of the room.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.