How to Build Wood Outdoor Benches

Written by laura reynolds
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How to Build Wood Outdoor Benches
("Garden Gate" magazine, California Redwood Association)

Most early furniture was rugged enough to use anywhere. With the advent of central heating and middle-class homes, carrying indoor furniture outdoors for entertaining became increasingly inconvenient and hard on the furniture. Resourceful Victorians were responsible for the concept of outdoor furniture---seating and tables that were sturdy as well as attractive enough to use for social occasions. The wood garden bench is one piece of outdoor furniture that is easy enough to build in a weekend.

Skill level:
Moderate

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Things you need

  • Cedar, cypress or preserved wood:
  • Six 1-by-3-by-16-inch pieces
  • Two 1-by-4-by-16-inch pieces
  • Eight 1-by-4-by-48-inch pieces
  • Four 4-by-4-by-16-inch pieces
  • 1 1/2-inch deck screws or other rust-resistant screws
  • 2-inch deck screws or lag bolts
  • Tape measure
  • Carpenter's square and level
  • Circular saw
  • Drill
  • Screwdriver
  • Power sander or sandpaper
  • Paint or stain and varnish to finish

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Instructions

  1. 1

    Prepare your wood. Cut four 4-by-4-by-16-inch corner posts, eight 1-by-4-by-48-inch pieces for seat slats and facing supports, two 1-by-4-by-16-inch pieces and six 1-by-3-by-16-inch pieces for side supports and seat braces. Seal ends to avoid moisture damage.

  2. 2

    Build the seat frame to begin. Set a facing support upright and attach it to a 1-by-3-inch side support, then add opposite facing and side supports. The tops of the side supports will be about an inch lower than the facing supports, which will protect the front and rear edges of the slats. Check for square, then attach the supports with rust-resistant screws. Attach the next seat supports between the front and back, beginning 4 inches in from each side to leave room for the legs. Space the two remaining 1-by-3-inch seat braces evenly across the rest of the space inside. Before attaching each brace with screws through the front or back supports, check that it allows the slats to sit level by laying a slat across the braces and sanding to make the top surface even if necessary.

  3. 3

    Put the front and rear slats on the bench, butting each up against the backs of the facing supports on the front and rear of the bench. Turn the seat upside down and set each leg in its corner tightly against the facing support between the side support and first seat brace. Attach each leg through both the facing and side supports with 2-inch deck screws or lag bolts. Before attaching the last leg, turn the seat right-side up again and add the last leg, adjusting so the seat doesn't "wobble" before attaching with 2-inch deck screws or lag bolts.

  4. 4

    Attach bottom supports to the outsides of the legs, again starting with facing supports, about 4 inches up from the base of the leg. Check for level before attaching, then attach the two 1-by-4-inch side supports, fitting them between the overlapping ends of the front supports. Turn the bench over and attach the other seat slats to the top. If they fit tightly together, sand the edges so there's a bit of space between them for water to drain. Sand all edges carefully before finishing with paint or stain.

  5. 5

    Individualise your bench. Create a back by using 4-by-4-by-36-inch back legs (shorten the back slat 8 inches). Attach a 1-by-2-by-48-inch strip to the back legs just above the seat slats as a back base and another at the top behind the corner posts to form a slight slant. Secure a 20-by-40-inch piece of garden lattice with two more pieces of 1-by-2. Add side pieces to frame the back. Add arms by increasing the height of the front corner legs to 24 inches (shorten the front slat 8 inches) and cut two 1-by-4-by-24-inch arms. Attach 1-by-2-by-3-inch support blocks to each corner of the back, and attach the arm on top of the blocks and front corners with deck screws or rust-resistant nails. Again, sand carefully or finish with a router to detail edges.

    How to Build Wood Outdoor Benches

Tips and warnings

  • Save a piece of 4-by-4 when you cut the pieces to measure offsets at the bottom of each leg and when inserting seat supports. Like all modern milled lumber, 4-by-4 is actually about 1/8 inch short of the traditional dimensions. Dry-fit everything before permanently attaching so that any adjustments can be made easily.
  • Make a curved seat by cutting a dip for the seat in six of the shorter pieces. Use 1-by-4-inch lumber instead of 1-by-3s. Mark a 2-inch-deep curve with a metal or bendable plastic yardstick and copy the curve on each of the other pieces. Trim two curved pieces at the ends so they fit against the front and back supports, allowing space for the first and last slats to sit snug. Sand the corners where the first slats and supports meet carefully to avoid splintering.
  • Use care when using tools and wear eye and ear protection when using power tools.

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