Step 9: Add the Bottom Boards

hands installing the bottom boards of this all weather planter
Photo: Matthew Benson
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Once all four sides are joined, turn the planter right-side up. Apply glue to the top of both interior ledges, then drop the bottom boards into place. When all the boards have been added, check that the planter's width at the center is the same as at the ends. Use 1-inch screws to fasten the boards to the ledges.
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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.