Transform the space under your deck
Our innovative waterproof deck ceiling system keeps your deck dry and means you can enjoy the space even when it's raining - plus it looks amazing!
The waterproof ceiling system your deck’s been missing
Whether you want a sheltered entertainment area, extra storage, or a waterproof play zone for the kids, Underdeck turns previously wasted space into a practical, usable area.
Why choose Underdeck?
- Premium Australian-made construction
- Seamless water management system that channels rain away
- Transforms unused space into valuable outdoor living areas
- Can be installed on both new and existing decks of all shapes and sizes
- Available in the complete Colorbond® range to match your home
Proudly manufactured in Australia to withstand our unique climate, from scorching summers to torrential downpours, Underdeck solves the age-old problem of wasted space beneath your deck. Our innovative outdoor ceiling system keeps your under-deck area completely dry and transforms an unsightly space into a beautiful, functional outdoor living area you can enjoy year-round.
See The Difference
From wasted to wonderful, see how Underdeck can transform your outdoor space
Made for Aussie Living
Australian-Made Quality
Built tough for Australian conditions. Underdeck is engineered specifically for our harsh climate - hot and cold!
Weatherproof & Durable
Our panels interlock seamlessly to create a waterproof barrier that channels water to the gutter, even in heavy rain.
Rust-Free & Low Maintenance
No rust, no fuss – just long lasting performance, with panels that remove easily if needed.
Quick & Easy Installation
Perfect for new or existing decks, our pre-engineered ceiling system can usually be installed in a day.
The Underdeck Story
Underdeck was born from a simple idea: why waste the valuable space under your deck?
Sick of staring at wasted, wet outdoor spaces that had so much potential, we set out to find a simple, effective way to make better use of the space under decks.
The result? Our team of Australian designers and engineers developed a solution that not only waterproofs the area beneath your deck but transforms it into a stunning, usable space that adds real value to your home.
What Our Customers Say
Don’t just take our word for it. Hear from homeowners across Australia who have transformed their under-deck spaces with our innovative waterproofing system.
"Not only has it provided shelter to the area under our deck but it has greatly improved the appearance."
We have been very pleased with the Underdeck facility that you installed at our Anglesea residence. Not only has it provided shelter to the area under our deck but it has greatly improved the appearance.
Since installation we have had several storms and the water has drained away extremely well. Also important was the fact that the installer/tradesman was good to work with and knew his job.
"The Underdeck looks contemporary, fresh and turned a very large ugly useless area into a great entertaining area. "
Greg has just completed our Underdeck at Thirroul. I would like to let you know that I have never had a builder so meticulous and taken so much care and pride in his work as Greg.
The Underdeck looks contemporary, fresh and turned a very large ugly useless area into a great entertaining area. Don’t ever lose Greg, he does your product proud. I will forward a couple of pics. Don’t hesitate to contact us if needed.
"The attention to detail and the clean joins, coupled with the awesome finish has given us exactly what we wanted and more."
We had a significant area of balcony that needed to be protected as well as waterproofed for protection of our deck below. After lots of research we went with Underdeck. What a great decision it turned out to be. Not only was it started and finished on time but the end product was amazing. The attention to detail and the clean joins, coupled with the awesome finish has given us exactly what we wanted and more. It wasn’t expensive but you wouldn’t know by looking at it. To the boys at Underdeck, thanks again and we will be recommending you to all we speak to.
"We are really happy with the way it now looks - so much better than the ugly underside of a treated pine deck"
Just thought we would send you a note to tell you how pleased we are with the job you did for our Underdeck in Inverloch.
We are really happy with the way it now looks – so much better than the ugly underside of a treated pine deck and the fact that it has made the space useable in all weathers provides us with an asset when it comes to adding value to our house.
We were also very pleased to meet Hamish, who carried out the job, and found him to be helpful and a tidy worker.
We would be more than happy for you to use our Underdeck as an example of your work and strongly recommend you and your company.
