1.   Any expansion joint, which is a half-inch space on each side of the room, parallel to the boards, will allow this space.

2.   Any wood board floor must have an expansion joint along its border, especially along the side where the boards are parallel to the wall.

3.   Any wood board floor must have an expansion joint along its border, especially along the side where the boards are parellel to the wall.

4.   At the expansion joints, commercial-grade polyurethane sealants keep water out and adhere tenaciously, if the joint is thoroughly cleaned.

5.   However, your question about an expansion joint intrigues me, because without the space an expansion joint affords, boards that expand may cup and buckle.

6.   If there were no expansion joints, cracks would appear willy nilly, and you would have a mess on your hands.

7.   Just hitting a bump as small as a freeway expansion joint could cause the body of the LeBaron to shimmy and sway.

8.   OK, your next chore is to check for that expansion joint between boards and wall.

9.   Q. My concrete driveway has lots of cracks, and not just at the expansion joints, where the cracks are supposed to be.

10.   Should an expansion joint be installed, if there is not one there now?