Baseboard Scarf Joint
When creating scarf joints in long runs of base, I find it tricky to maintain alignment, and as a weak point in the run, a scarf joint is at risk of opening up due to seasonal changes. To overcome these problems, I cut the scarf at 45°, clamp the two halves together, and cut a deep biscuit slot in the bottom edge across the miter. As shown in the drawing below, this slot allows a biscuit to be buried into the baseboard, thus aiding alignment and providing a much stronger glued joint.
Robert Gunn, Mississauga, None