Weatherproof Deck: Enjoy Outdoor Living in Any Season

Living in Australia, we have a climate encouraging outdoor living. But with this comes the challenge of maintaining our outdoor spaces in the harsh elements. A critical part of this is how we build and protect our decks. This is where the concept of a weatherproof deck comes into play.

What is a Weatherproof Deck?

weatherproof deck is a deck that is designed and installed to withstand the elements while providing a dry, comfortable outdoor living space. The concept extends beyond mere water resistance, encompassing complete waterproof decking design, under-deck waterproofing, and a choice of materials like composite decking that offer durability and style.

Why Choose Waterproof Decking?

With waterproof decking, you can protect the investment of your deck and the space beneath it. With under-deck waterproofing, it becomes a functional, dry under-deck area, perfect for storing outdoor equipment or creating additional living space.

Waterproof decking systems offer a host of benefits:


Water proof decking protects the core structure of your deck like the joists from moisture, helping prevent rot and extending the life of your deck.

Adds Value

Waterproofing a deck adds value to your home by increasing usable outdoor space.

Reduces Maintenance

A weatherproof deck or watertight decking requires less maintenance and cleaning than traditional decks.

Composite Decking: A Great Choice for Weatherproof Decks

When considering how to waterproof a deck, materials matter. One of the best options is composite decking, a timber alternative made from a mix of wood fibres and recycled plastic.

Composite decking offers numerous advantages:


Whether its for an underdeck or deck waterproof system composite decking has several advantages including being resistant to rot, warping, and splintering. Termites won’t eat it, and it’s more fire-resistant than timber, leading to a more fireproof deck surface.

Low Maintenance

Unlike timber, composite decking doesn’t require regular staining or sealing. Simply cleaning it with a pressure washer is usually enough to keep it looking great.


Composite decking comes in various colours and finishes to suit any home. With an innovative tongue and groove design that creates a seamless look, composite decking is a stylish choice for modern homes.

Under Deck Waterproofing Options

Whether you’re building a new deck or retrofitting an existing one, several under-deck waterproofing options exist.

Waterproof Decking Systems

These include proprietary products like the Trex RainEscape system. These systems use a network of troughs and gutters installed beneath the decking boards to catch and divert water away from the deck.

Under Deck Waterproofing Membrane

Another option is to install waterproofing under the deck membrane. These membranes are fastened to the underside of the decking, catching any water that seeps through and diverting it away.

Waterproof Decking Boards

Waterproof decking boards are another alternative. These unique tongue and groove designs create a watertight seal between the boards, preventing water from penetrating beneath.

Incorporating Decking into Garden Ideas

A weatherproof deck can be a beautiful and functional addition to any garden. When incorporating decking in garden ideas, consider the following:

Outdoor Living Space

With waterproof decking over the living space, you can create an outdoor lounge or dining area, perfect for entertaining.

 Garden Storage

A weatherproof deck with under-deck waterproofing creates a dry under-deck space, perfect for storing garden tools and equipment.

Greenhouse or Potting Area

The dry area under a waterproof deck is also ideal for a greenhouse or potting area, protected from rain but still accessible from your home.

Building a weatherproof deck is a wise investment, providing you with a durable, low-maintenance outdoor living space that can withstand the Australian weather. By choosing suitable materials, like composite decking, and considering under-deck waterproofing options, you can enjoy your deck for many years.

Deck Waterproofing Process

Installing a weatherproof deck involves several key steps, which may vary depending on the type of waterproofing system chosen.

Surface Preparation

The first step is to ensure the deck’s surface is smooth and clean. Remove any debris, stains, or loose boards. A thorough cleaning of the deck boards with a pressure washer might be needed.

Application of Waterproofing Products

Waterproofing products, such as a waterproofing deck stain or liquid rubber, are applied to the surface.

Installation of Under-Deck Waterproofing

The under-deck waterproofing membrane or decking system, such as the Trex RainEscape system, is installed beneath the deck boards. This system catches water that seeps through the decking and diverts it from the area below.

Sealing the Deck

The final step is to seal the deck, covering the waterproof membrane to protect it from UV damage and wear and tear.

Choosing the Right Waterproof Decking System in Australia

When choosing the right waterproof decking system, it’s essential to consider the specific needs of your home and the Australian climate. Waterproof decking systems Australia are designed to handle the country’s unique weather conditions.

Consider the Climate

A waterproof decking system with a robust drainage system would be ideal in areas prone to heavy rainfall. For sunnier regions, consider a deck covering that offers UV protection to prevent fading and damage.

Think About the Under-Deck Space

Consider a dry or under-deck ceiling system if you plan to utilise the space under your deck. These will ensure the under-deck space remains dry, providing a comfortable outdoor living or storage area.

Assess the Maintenance Needs

The amount of maintenance you are willing to undertake will also influence your choice. Some waterproof decking systems require regular upkeep, such as periodic re-sealing or cleaning.

Maintenance Tips for Weatherproof Decks

Even though weatherproof decks are designed to withstand the elements, they still require some maintenance to keep them in top condition.

Regular Cleaning

Sweep the deck regularly to prevent the build-up of leaves and other debris that can stain the deck surface and clog the drainage system. Occasionally clean the deck with a pressure washer, soft brush, and soapy water.

Check the Waterproofing System

Inspect the waterproof decking system regularly to ensure it’s functioning correctly. Check the under-deck waterproofing membrane for any signs of damage and repair as necessary.

Re-seal as Needed

While composite decking doesn’t require re-sealing, wood decks should be re-sealed every few years to maintain their waterproof properties and keep them looking their best.


In conclusion, a weatherproof deck is a worthwhile investment for any Australian home. Not only does it offer protection and longevity, but it also adds aesthetic appeal and functional outdoor living space to your property. With the right waterproofing system and deck material, and an understanding of how to waterproof decki