Step 8: Join the Sides Together

person using clamps and a drill to hold together the sides of this all weather planter
Photo: Matthew Benson
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Apply glue to the edge of a short side and the gap on the interior of a long side. Turn both sides on their top edge, and join the glue-bearing surfaces together so that the face of the short side forms a corner with the edge of the long side. Clamp the corner as shown to hold the sides together. Using a drill/driver with a -inch bit, drill a pilot hole through the face of the long side into the edge of the short side, at the top, middle, and bottom. Drive a 1-inch screw into each pilot hole. Repeat for each corner of the planter. Let glue dry for at least 2 hours.
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    Tools List

    • miter saw
      Miter saw
    • drill
      Drill/driver
    • adjustable clamp
      Clamps
    • tack cloth
      Tack cloth
    • 3-inch wide paint brush
      Paint brush

    Shopping List

    1. Cellular PVC trim boards We used AZEK trim. Get two 12-foot 1x4s and four 12-foot 1x3s. If 1x3s aren't stocked, rip them from 1x4s and use the scrap for the ledges.

    2. Cellular PVC beadboard Choose 5½-inch tongue-and-groove boards or similar.

    3. Plywood and scrap 1x material

    4. PVC adhesive Choose a clear glue with a slow setting time, such as AZEK adhesive.

    5. 1-inch pan-head stainless-steel screws6. 1 5⁄8-inch trim-head stainless-steel screws

    7. Spackling paste rated for outdoor use, such as CrackSHOT, to fill fastener holes.

    8. Fine-grit sandpaper

    9. Latex exterior paint For dark colors use a reflective paint, such as VinylSafe by Sherwin-Williams, so that the PVC won't warp in the heat.