How to build modular decking

rueben
View the video

How to build modular decking

View the video
×

More D.I.Y. Advice

lay decking 02:46

Decking How to lay decking You can make the most of your outdoors and add real value to your home with a deck. We’ll take you through the steps involved in laying merbau decking.

Choosing the right finish for your deck

Decking How to choose decking oil, paint or stain for your deck Choosing the perfect finish for your deck becomes lot simpler when you understand the differences between what’s on offer. Feast Watson takes us through some of the best finishes to suit all design desires—whether it’s matte, glossy, natural or colo...

A deck with lunge chair over looking a backyard

Decking Composite decking vs wood: The benefits of composite decking If you’re looking to install a new outdoor deck at home, or even refresh what you already have, you may want to consider installing composite decking boards instead of timber boards. Elton from Ekodeck explains some of the benefits of choosing compo...

good times decking.jpg

Decking Decking buying guide: modular decking systems Using a prefabricated modular decking system is a great way to enhance your outdoor space, big or small. The team at Good Times share more information about why you should buy one.

A deck with a family sitting on it

Decking Why choose HardieDeck? If you’re looking for a durable and low maintenance decking , you can’t go past HardieDeck™.

Person cleaning the deck with high pressure water cleaner 02:46

Decking How to choose and maintain decking for a beach house An outdoor deck is a great spot for entertaining. We’ll show you how to choose the right materials and finishing, and give you some maintenance tips.

clean deck 02:08

Decking How to clean a deck There’s nothing like giving your deck a thorough clean to bring it back to life.

outdoor decking

Decking Seven different deck design ideas A deck is a popular and easy way to extend your living area to the outdoors. Check out these seven different deck ideas from Bunnings Warehouse.

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
lay decking 02:46

Decking How to lay decking You can make the most of your outdoors and add real value to your home with a deck. We’ll take you through the steps involved in laying merbau decking.

Choosing the right finish for your deck

Decking How to choose decking oil, paint or stain for your deck Choosing the perfect finish for your deck becomes lot simpler when you understand the differences between what’s on offer. Feast Watson takes us through some of the best finishes to suit all design desires—whether it’s matte, glossy, natural or colo...

A deck with lunge chair over looking a backyard

Decking Composite decking vs wood: The benefits of composite decking If you’re looking to install a new outdoor deck at home, or even refresh what you already have, you may want to consider installing composite decking boards instead of timber boards. Elton from Ekodeck explains some of the benefits of choosing compo...

good times decking.jpg

Decking Decking buying guide: modular decking systems Using a prefabricated modular decking system is a great way to enhance your outdoor space, big or small. The team at Good Times share more information about why you should buy one.

A deck with a family sitting on it

Decking Why choose HardieDeck? If you’re looking for a durable and low maintenance decking , you can’t go past HardieDeck™.

Person cleaning the deck with high pressure water cleaner 02:46

Decking How to choose and maintain decking for a beach house An outdoor deck is a great spot for entertaining. We’ll show you how to choose the right materials and finishing, and give you some maintenance tips.

clean deck 02:08

Decking How to clean a deck There’s nothing like giving your deck a thorough clean to bring it back to life.

outdoor decking

Decking Seven different deck design ideas A deck is a popular and easy way to extend your living area to the outdoors. Check out these seven different deck ideas from Bunnings Warehouse.

Moroccan inspired outdoor setting

Outdoor Living Bring the magic of Morocco to your backyard Let the colour, texture and style of Morocco inspire you to create a garden oasis that is full of lush and luxurious treasures.

pallet coffee table

Outdoor Living Five D.I.Y. ideas to update your outdoors Autumn is a great time of the year to tick off a few D.I.Y. projects from your to-do list. Here are a few good ideas to get you started.

Close up of a vertical garden setting

Outdoor Living How to create a balcony garden Want to create a garden, herb garden or veggie garden on your balcony? Follow our steps to choose the best plants for your balcony and add some greenery to your home.

Protect your pillows and cushions 02:10

Outdoor Living How to protect outdoor furniture The winter rain and summer sun can take its toll on your outdoor furniture. But there are some simple things you can do to keep it looking good and last longer.

small space

Outdoor Living How to decorate a small backyard Small backyards can be great to entertain in, especially as the weather gets warmer and the days get longer. Check out these great ways to make your outdoors the place to be this party season.

outdoor table with drink coolers 04:48

Outdoor Living D.I.Y. outdoor table with built-in drinks cooler Learn how easy it is to make an outdoor table with a built-in drinks cooler that can become the focal point for all your get-togethers. Learn more here.

playground

Outdoor Living Create your own playground at home With a bit of imagination and some D.I.Y., you can set up a whole world of fun and adventure for the kids in your own backyard. Whatever size space you have, check out these great ideas that will get the kids outdoors and active.

outdoor setting

Outdoor Living How to choose the perfect outdoor setting The right furniture can transform any outdoor space to a more liveable area, but how do you choose. Find out with this guide from Bunnings Warehouse.

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.
Top of the content