My 40-yr-old home has an annoying squeaky spot under the carpet in one area. When I was in the crawlspace insulating the water pipes, I noticed a place in the same general area as the squeak where one cross-brace "leg" had become unattached from the joist. Could this be causing the squeak? If so, would just nailing it on again fix the squeak, or should I put some sort of shim between the floorboard and the joist first? Joists are 16" o.c., if that matters.
Thx.