Project Guide

Build an Outdoor Sofa

1
CUT LUMBER
Cut lumber - Outdoor Sofa Bench
  • Measure, mark and cut the 10 2 x 4-inch x 8-foot boards using a circular saw according to this cut list and diagram.
    • Seven 72-inch wood sections (seat boards)
    • One 75-inch wood section (bottom back board)
    • One 79-inch wood section (top back board)
    • Two 24-inch wood sections (arm rests)
    • Five 21-inch wood sections (cross pieces)
    • Four 22 ½-inch wood sections (legs)
2
CUT DIAGRAM
Chart
  •  Smooth any rough ends with the sanding sponge.
3
ASSEMBLE THE SEAT FRAME
Assemble seat frame - Outdoor Sofa Bench
  • Lay the two 72-inch seat board sections horizontal and parallel standing on their 2-inch sides.
  • Place two of the 21-inch cross piece sections vertically standing on their 2-inch sides between the two seat boards and flush with the ends.
  • Clamp in place.
  • Secure the 72-inch seat boards to the 21-inch cross sections by using a 1/8-inch drill bit and pre-drilling two holes through the 72-inch seat boards and then using two 2 ½-inch screws in each end.
  • Align a third 21-inch cross piece vertically in the center of the frame, pre-drill holes and attach with screws.
  • Finally, split the remaining difference in half on both sides of the center cross piece for the fourth and fifth 21-inch cross pieces, pre-drill holes and attach with screws.
  • Attach the five remaining 72-inch seat boards flat and evenly spaced about 1 ½ inches apart on top of frame using one screw into each cross piece beneath.
4
ADD THE SEAT
Add the seat - Outdoor Sofa Bench

Attach the five remaining 72-inch seat boards flat and evenly spaced about 1 ½ inches apart on top of the frame using one screw in each cross piece beneath.

5
ATTACH LEGS AND ARM RESTS
Attach legs and arm rests - Outdoor Sofa Bench
  • Stand frame on long end.
  • Align the two 22 ½-inch legs flush to each side of the frame at 8 ½-inch from the bottom of the leg to the bottom of the frame, pre-drill two holes and attach with screws.
  • Flip frame over and repeat on opposite side.
  • Stand sofa on legs.
  • Secure the two 24-inch armrests to the top of the legs, flush with the inside of the legs, by pre-drilling and attaching one screw in each end.
6
ATTACH BACK BOARDS
Attach back boards - Outdoor Sofa Bench
  • Lay sofa face down.
  • Align the 79-inch top back board so that it is flush with the top of the hand rails. 
  • Pre-drill and attach with 2 screws on each side.
  • Then using one screw on each side, pre-drill holes and attach the 75-inch bottom back board 1 ½ inches below the top board.
7
PAINT OR STAIN (OPTIONAL)
Paint or stain  - Outdoor Sofa Bench
  • Paint or stain sofa/bench with exterior paint or stain.
  • Use a stainable/paintable wood putty to fill in screw heads and touch up with paint or stain used.