Project Overview

Modular decking can help transform your backyard. By doing it yourself you’ll save money and the kits are flexible and easy to assemble. This simple step-by-step guide will show you how to build a modular deck, how to join base frames together and how to attach the decking.
Continue to step-by-step instructions

Step by Step Instructions

1 Clear and measure
2 Assemble the base frame
3 Attach the joists
4 Put the frame legs together
5 Attach the legs to the base frame
6 Put the base frames in place
7 Make the frame level
8 Clamp the base frames together
9 Screw the bases together
10 Make the deck level
11 Lay the decking
12 Pre-drill the holes to attach the decking
13 Attach the decking to the base
  • Step 1. Clear and measure

    After deciding where you want to build your modular decking, clear the area of any debris. Measure the height and the width of the decking you want to build.

  • Step 2. Assemble the base frame

    Identify the four pieces of wood that make up the base frame. They have pre-drilled, countersunk holes at the end and larger pre-drilled holes at the bottom. Use the drill and batten screws to join together the four pieces of wood to make the base frame.

  • Step 3. Attach the joists

    Turn the base frame over. Use the drill and batten screws to attach the two joists through the pre-drilled holes. Repeat steps 2 and 3 to build any other base frames you need.
  • Step 4. Put the frame legs together

    To assemble the legs, connect the support leg to the bracket and then screw in the adjustable foot to the support leg. Use the batten screws and drill to attach the support leg to the bracket. Repeat this process to make all of the frame legs.
  • Step 5. Attach the legs to the base frame

    Turn the base frame over, so that it’s upside down. Place one of the legs, so that it’s flush with the corner. Secure the leg to the frame using the batten screws. Repeat this to attach all four legs.

  • Step 6. Put the base frames in place

    Work out where you’re going to place your decking. If it’s on soil or grass, place a paver under each foot, to stop it from sinking. Mark where the pavers are.  Remove the pavers and base frame. Dig a shallow trench for the pavers to sit in. Put the pavers and base frame back in place.
  • Step 7. Make the frame level

    Once your base frame is in place, use the spirit level to check that its level. Adjust the feet until it is.

  • Step 8. Clamp the base frames together

    Place the second base frame next to the first. If necessary, place pavers under the legs. Clamp the two base frames together. Use the spirit level to make sure both frames are flush and level. If necessary, adjust the feet to make sure they are.

  • Step 9. Screw the bases together

    Pre-drill six holes in the side of the base frames – two at each end, at the top and bottom and two in the middle at the top and bottom. Use the batten screws to secure the two base frames together.

  • Step 10. Make the deck level

    After screwing the base frames together, use the spirit level to make sure the decking is level. Use the adjustable spanner to raise or lower the feet so that it’s level.  Secure the height of the feet by tightening the locking nuts at the top of the feet.

  • Step 11. Lay the decking

    Lay the prefabricated decking panels on top of the base frames. Make sure that all of the gaps are even and the wood is aligned. 

  • Step 12. Pre-drill the holes to attach the decking

    To attach the decking, pre-drill eight holes into each panel. Drill one hole at both ends of the second board and two more where the supporting joists are. Repeat this on the fourth board on the panel and then for every panel.

  • Step 13. Attach the decking to the base

    Use the cordless drill and screws to attach the decking to the base frames in the eight holes pre-drilled in each panel.

Tools and Materials

Tools

  • Adjustable spanner
  • Cordless drill
  • Drill bits
  • Ear muffs
  • Rake
  • Safety glasses
  • Shovel
  • Spirit level
  • Tape measure

Materials

  • Batten screws
  • Modular decking
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Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
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