Benches: Composite Deck Bench Plan

A standard bench for a deck is 18” tall built on two 4x4 support legs. For a full maintenance free bench, frame using pressure treated 2x4 material (instead of the 2x6 framing used for a wooden deck) and trim with maintenance free material.

Trim on the bench is installed the same as the horizontal deck trim. Be sure to install the fasteners in the trim as often as the fasteners in the decking when installing maintenance free trim. Every 16” is most common. The maintenance free trim will cover both the 2x4 frame and the bench seat edge.

Often maintenance free support legs can be made if the material being used has a matching railing system with 4x4 posts. Blocking between the front and back framing member should be installed every 16” the same as the decking. Bench support legs can be placed every four to six feet.

Below is a plan for a maintenance free deck bench.

The maintenance free bench with composite trim attached.