Tongue and Groove Joinery

With all boards cut to the proper length, the next step is to joint one edge of each of the boards. This can be easily done with a jointer.

If you don't have a jointer, there is another option. Try using a table saw jointer jig. This simple jig allows you to create a smooth, flat edge that is perpendicular to the flat sides of the board using only your table saw.

Jointing one edge of the boards is vital to having a clean, seamless tongue and groove joint.