Step 13: Attach the Backrest Boards and Cap the Top

attaching the backrest cap for the bench
Photo: Kolin Smith
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Starting at the top, place the first 1x4 board against the backrest supports, flush with their tops. Screw the board to the supports as described in Step 12. Secure alternating 1x2s and 1x4s beneath the first one, using ¼-inch spacers between them during installation. Cut the 1x4 cap to size so that it fits between the back legs. Apply a thin bead of construction adhesive to the top edge of the first 1x4 backrest board and the tops of the backrest supports. Set the cap in place and secure it to the supports with 1¼-inch screws.
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    Tools List

    • sledge hammer
      sledgehammer
    • miter saw
      miter saw
    • jigsaw
      jigsaw
    • drill
      drill/driver and 1-inch paddle bit
    • caulk gun
      caulk gun
    • four-foot level
      4-foot level
    • hand clamps
      clamps
    • combination square
      combination square
    • flexible curves
      flexible curve to draw profile for rafter tails

    Shopping List

    All lumber listed is western red cedar.

    2x4s Get twelve 8-foor boards.

    1x4s Get at least four 8-foot boards.

    1x2s Get at least nine 8-foot boards. 2x6s Get three 8-foot boards.

    2x2s Get two 8-foot boards or five 4-foot spindles for the purlins.

    ¼-inch spacers cut from scrap.

    Post anchors Get four.

    Construction adhesive

    Stainless-steel trim-head screws You need three sizes: 1¼ inch, 2 inch, and 3 inch.