How to Install Decking: A Comprehensive Australian Guide


Adding a deck to your outdoor space can significantly enhance your home’s aesthetic appeal and functionality. Installing decking over a concrete slab provides the perfect location for family gatherings, parties, or a quiet afternoon lounging in the sun. This guide will walk you through the step-by-step process to install decking, whether timber decking or composite decking and offer helpful tips to make your project easier.

Choosing Your Decking Material

Before starting your decking project, the first decision you must make is choosing the decking material. Timber and composite are two popular options, each with its unique benefits.

Timber Decking

The beauty of natural wood is undeniable, and many Australians opt for timber as a decking install due to its aesthetic appeal. Timber also allows various finishes, giving you the flexibility to achieve the desired look. However, timber decking will require maintenance to keep it looking its best.

Composite Decking

On the other hand, composite decking, made from a blend of wood fibres and plastic, is gaining popularity. Composite decking boards are highly durable, require little to no maintenance, and resist weather changes, making them an excellent choice for Australian homes. Though initially more expensive, the low maintenance requirements may offset the cost.

Preparation and Planning

Before you start installing your decking, proper planning and preparation are crucial. These steps ensure that you get the best results out of your project.

Measure Your Area

First, measure the area where you plan to install your deck. Determine the size and shape of your deck and calculate the length and width of the deck boards you’ll need. Remember, in most cases, it’s better to purchase extra panels to accommodate for cutting and potential mistakes.

Create a Plan

Once you have your measurements, it’s time to lay out your project. Use a chalk line or a straight board to mark along one side of the deck. Allow the panels to overhang the frame’s edge for a neat finish slightly.

Building the Subframe

The subframe is the skeleton of your deck, providing support and stability. It includes the joists, sleepers, and frame.

Setting Up the Frame

Start by marking out the area where the deck will go. Then, prepare your sleepers by cutting them to size and securing them using screws. If installing a raised deck, ensure the sleepers are securely anchored to the ground and level.

Installing the Joists

Next, install the joists. These should be evenly spaced along the frame using joist spacers, with the inner beams positioned parallel to the outside of the deck. Ensure all posts are level, and securely fix them to the frame using screws or nails.

Laying the Deck Boards

Once the subframe is ready, it’s time to lay the deck boards.

Positioning the Deck Boards

Begin from one corner and work your way across the deck. Place your first board and mark the position of the joists below. Then, use a drill to create a 2 mm hole through the deck board into each post to prevent the wood from splitting when you drive in the screws.

Fixing the Deck Boards

Secure the deck boards to the joists using screws or decking nails. Ensure each board is straight and level before fixing it in place. Continue this process until all panels are installed, remembering to leave a small gap between boards for drainage and expansion. Use a chalk line to ensure your boards run straight.

Finishing the Deck

Once all the decking boards are installed, trim any excess length from the panels to give a neat finish to the side of your deck. Now, your deck is installed and ready for use.

Decking in Garden Ideas and Its Benefits

A deck can transform an outdoor area into a versatile living space. Installing decking opens up a world of garden ideas, from an outdoor dining area to a tranquil retreat. Decking can integrate seamlessly with your existing landscape design, whether you have a lush garden, a minimalist patio, or a swimming pool area.

Aside from aesthetics, a deck can add value to your home. It provides additional living space, improves the appeal of your property, and could increase the resale value.

The Cost of Installing Decking

The cost of installing decking can vary greatly depending on the deck size, the materials used, and whether you choose to do it yourself or hire a professional. Composite decking may cost more initially, but it could offer savings in the long term due to its durability and low maintenance.

Installing decking can be a rewarding DIY project with careful planning and the right tools. Whether you choose timber or composite decking, the process is straightforward if you follow these steps. Not only will you enjoy the practical benefits of a deck, but you’ll also have the satisfaction of building it yourself. So go ahead and install a deck today to give your outdoor space a fresh, new look.

Maintaining Your Deck

Maintaining your deck is crucial to its longevity, regardless of your chosen material.

Timber Decking Maintenance

Timber decking requires regular maintenance. This includes cleaning, staining, and sealing to protect the wood from weather elements and to prevent it from warping or splitting. Depending on the weather conditions and the type of timber used, you may need to reapply the sealant every year or every few years.

Composite Decking Maintenance

While composite decking is more weather-resistant and less prone to damage than timber, it still needs some care. Regular cleaning can help maintain its appearance. Most manufacturers recommend cleaning composite decking with a mild soap and water solution.

Safety Considerations When Installing Decking

Safety is paramount when undertaking any DIY project, including installing decking. Always wear appropriate safety gear, including gloves, safety glasses, and sturdy footwear. Also, ensure the deck is structurally sound, particularly if installing a raised terrace.

Hiring a Professional vs DIY Deck Installation

While installing decking can be a great DIY project, it’s not for everyone. Hiring a professional might be the best option if you’re unsure about any aspect of the job or don’t have the time. A professional deck installer can offer expert advice, ensure the job is done to a high standard, and potentially save you time and stress. However, this comes with additional costs.

Make the Most of Your Deck

Once your deck is installed, the fun part begins. Whether choosing outdoor furniture, setting up a barbecue, or adding potted plants, there are endless ways to personalise your deck and make it a functional and enjoyable home extension.

Installing decking is a worthwhile project that can enhance your home’s outdoor space and potentially add value to your property. By considering your options, planning carefully, and following the necessary steps, you can create a deck that suits your lifestyle and complements your home. Whether you opt for the natural beauty of timber or the durability of composite decking, the result is a beautiful outdoor area that you and your family can enjoy for years.

Understanding Decking Options: Size and Layout

Every homeowner has different needs and preferences, making the size and layout of the deck a vital consideration. Your deck should be large enough to accommodate your needs and proportionate to your house and garden. Consider your deck’s intended use. For a family space, you might need an enormous balcony. For a peaceful reading nook, a smaller deck might be more suitable.

Other Considerations When Installing Decking

Weather and Climate

The weather and climate of your area can influence your choice of decking material. Timber decking in areas with high rainfall might require more maintenance to prevent water damage. In contrast, composite decking is highly resistant to water damage, making it a better option.

Permits and Regulations

Before you start your project, find out if you need a permit to install a deck in your area. Additionally, ensure your plan complies with local building codes and regulations.

The Lifespan of Your Deck

The lifespan of your deck depends on the materials used and how well it’s maintained. If properly cared for, timber decks can last 15 to 20 years. On the other hand, composite decks can last for over 25 years with minimal maintenance.

Enhancing Your Deck with Accessories

Decking accessories, such as railings, lighting, and outdoor furniture, can enhance the functionality and aesthetics of your deck. Add built-in seating, planters, or a fire pit to make your patio an all-year-round space.


Whether you’re a seasoned DIY enthusiast or a novice keen to learn, installing decking can be a gratifying project. From choosing suitable materials to planning your deck’s size and layout, each step brings you closer to creating a space you and your family can enjoy. Don’t forget the value a deck can add to your home – not just in monetary terms but also in the quality of your lifestyle. With the information in this guide, you are well-equipped to embark on this exciting project. So, get your gloves on, gather your tools, and transform your outdoor space!