Step 4: Cut Trays to Fit

cutting planted trays with a gas-powered concrete saw
Photo: Alison Rosa
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Usually, trays have to be cut to fit between the last full tray in a row and the edging. An installer measures for each end piece, then transfers his mark to a full tray with a wax pencil. Because the trays are filled with a growing medium made of tough aggregate, a gas-powered concrete saw fitted with a masonry blade is used to cut the trays. The cut end butts against the last full tray in the row. On this job, one installer laid the rows of trays, another took measurements for the end pieces, and a third made cuts on the ground before sending a few rows' worth of end pieces up to the roof.
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    Tools List

    • 16-foot tape measure
      Tape measure
    • drill
      Drill/driver
    • concrete saw
      Concrete saw with masonry blade

    Shopping List

    1. EPDM

    2. Modules

    3. Engineered soil

    4. Sedums

    5. Aluminum edging