1.   However, be sure the gap is wide enough to allow the wood to expand and contract.

2.   Any nail holes that are not filled with another nail will soon disappear as the wood expands.

3.   In absorbing and expelling moisture, wood expands and contracts along the grain.

4.   It would crack out or get squeezed out as the wood expands and contracts.

5.   Since there was no expansion at the borders of the floor, there was no place the wood could expand to, hence the buckling.

6.   The roughness of the beams will allow the joint compound to stick well, even resisting peeling when the wood expands and contracts.

7.   The wood expands and contracts with the cold, even more so with absorption and loss of water.

8.   This can happen if the wood around the hinge screws expands enough so the screws no longer bite into the wood.