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Mini cold frame

Grow seeds or cuttings during the cooler months with this easy-to-make cold frame.

Build a mini cold frame

Weekend DIY with Mark Rayner - Project 67

Difficulty level: Moderate

You will need:

  • 25mm exterior screws, 40mm exterior screws, 90mm decking nails,
  • 50mm x 25mm treated timber (approx 2.5m),
  • 240mm x 45mm treated timber cut to the following lengths: 800mm (x2), 400mm (x2),
  • Acrylic sheet measuring 890mm x 400mm,
  • Drill and drill bits, exterior hinges with screws (x2), exterior PVA glue, hammer, paintbrush, pencil,
  • Resene Lustacryl tinted to Resene Pipi, Resene Quick Dry, sandpaper, saw, screwdriver, tape measure.

To get the look: Mark painted the background shed wall with Resene Lumbersider tinted to Resene Blake.

Other ideas: For a pale green effect paint the cold frame with Resene Lustacryl tinted to Resene Soft Apple.

Step 1 Step one
Assemble the four pieces of 240mm x 45mm timber to form a rectangular frame, as shown, fixing with exterior PVA glue and 90mm decking nails.
Step 2 Step two
Measure, mark and cut the 50mm x 25mm timber into two pieces measuring 900mm and two pieces measuring 400mm. Mitre the corners, as shown, and smooth any rough edges with sandpaper.
Step 3 Step three
Assemble these four pieces together to form a smaller rectangular frame, as shown. Fix at each corner with exterior PVA glue and 40mm screws, drilling pilot holes first.
Step 4 Step four
Apply one coat of Resene Quick Dry to both rectangular frames and allow to dry.
Step 5 Step five
Apply two coats of Resene Lustacryl tinted to Resene Pipi to both rectangular frames, allowing two hours for each coat to dry.
Step 6 Step six
Attach the piece of acrylic sheet to the smaller frame, as shown, carefully fixing with 25mm screws. Again, drill pilot holes first.
Step 7 Step seven
Fix the lid of the cold frame to the base using the two hinges, as shown.
Step 8 Step eight
Carefully drill 4mm holes in the acrylic sheet at each corner and halfway along each edge – this will ensure any water drains away.

Download a PDF of this project

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