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How to Make a Sectional Greenhouse

A sectional greenhouse represents how modern greenhouses get built today, phase-by-phase, until the structure meets the owner's size and space needs for garden work. The beauty of the process allows the owner to customize the greenhouse to a desired size, and the structure can be shrunken or expanded as necessary with new sections. Using inexpensive materials incorporating basic framing and plastic for wall surface, a fairly large greenhouse can be built for little cost.

Things You'll Need

  • Old logs
  • Dirt
  • Shovel
  • Wheelbarrow
  • Sectional plumbing pipe
  • Plastic tarp
  • Power drill
  • Bolts and nuts
  • Crescent wrenches
  • Utility tape
  • Weather-proof glue
  • Scissors
  • Wood
  • Hammer
  • Nails
  • Prefabricated window vents
  • Door frame
  • Door and handle
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    • 1

      Choose a location on your property that has natural protection from weather, such as tree cover or hills, with a good afternoon sun exposure on the majority of the zone.

    • 2

      Lay down long barriers with scrap logs or wood walls and fill them with dirt for the plant beds. Fill in enough dirt so that the barriers and soil reach at least 1 foot in height if not more. Transport the dirt with a wheelbarrow and shovel.

    • 3

      Use sectional plumbing pipe to construct the frame of the greenhouse by phase. Make each phase consistent of two piping frame pieces approximately 2 feet apart. Connect the piping by drilling holes in the metal with a power drill and bolting pieces together with metal pipe clamps. Tighten the bolts and nuts with crescent wrenches.

    • 4

      Build the frame sections with pipe joints and bolts so that the section break includes the vertical pipes of the walls, a horizontal cross beam along the wall tops and angled pipes meeting at the center line of the room. Connect each pipe with the appropriate pipe joint for the necessary angle.

    • 5

      Construct the frame assembly around and over the dirt beds built in Step 2. Build an entrance way with the piping connection so that you can enter the greenhouse when the walls are installed.

    • 6

      Apply thick, somewhat clear plastic tarp to every section and clip it into place. Tape the tarp where necessary to hold it stationary until completely spread. Go back and apply weather-proof glue to the piping the tarp is clipped to and reseal with utility tape until the glue hardens. Continue this process around the greenhouse until the structure is completely covered.

    • 7

      Cut out squares in the tarp with scissors and build a window frame approximately 2 feet wide by 3 feet tall. Use wood, a hammer and nails to build the square frame. Insert it into the square cavity. Bolt the frame to the adjacent piping.

    • 8

      Install pre-built vents into the frames to control air flow into the greenhouse. Repeat the process until you have at least two vent windows on both ends of the structure.

    • 9

      Use the scissors to cut a rectangle in the plastic where the door frame exists in the piping structure. Bolt a door wood frame to the piping. Hang the related door to the frame and hammer the hinge pins home, locking it in place. Use a screwdriver to install the door handle.