Filling gaps between boards

Gaps between boards look unsightly and can cause draughts. This is not normally a problem with tongue-and-groove boards. For square-edged boards, large gaps should be filled

Tools and materials
Sliver of wood, wood glue, hammer, block plane

Cut a strip of wood to fit in the gap. Apply wood glue to both sides of the strip.
Insert the wood strip into the gap, knocking it in with a hammer for a tight fit. Allow it to sit slightly above the floor surface.
After the glue has dried, use a block plane to remove the excess wood, and to create a smooth finish flush with the floor.