Many Aussie homeowners don’t realise the space under an elevated or second-storey deck can be prime real estate.
By installing an under-deck drainage system, you can transform that often-wasted area into usable square metres – perfect for everything from secure storage to a fully equipped outdoor living space.
What is an under-deck drainage system?
An under-deck drainage system acts as a shield for the timber subframe, protecting it from our harsh weather conditions. Without protection, constant exposure to rain can cause joists and bearers to rot, undermining the structural integrity of the deck. Using a series of troughs and downspouts, the system diverts water away from the deck, keeping the space below dry and safe while preventing decay and costly moisture damage.
Types of deck drainage systems
Installing a deck drainage system is generally done in one of two ways: above the joists or below the joists.
- Below-the-joist systems are typically installed after the decking boards are in place. While this can create a dry space underneath, you are exposing the timber frame and fixings to moisture, which can lead to rot, corrosion, and structural issues.
- Above-the-joist systems are installed before the deck boards go on, covering the subframe much like roof shingles protect a house. This type of system prevents water from ever contacting the joists and beams, providing the highest level of protection and significantly extending the deck’s lifespan.
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For maximum protection and long-term peace of mind, many professional deck builders choose Trex® RainEscape®. This above-the-joist system requires just five SKUs and three tools for an easy, no-fuss install. It is backed by a 25-year warranty from the world’s leading composite decking brand.
Endless possibilities
With the area under the deck protected and dry year-round, the options for your clients are virtually limitless. Builders can safely install electrical wiring and gas lines to power lighting, ceiling fans, appliances, electronics, and more.
With thoughtful planning, you can transform that under-utilised space into an all-weather entertainment hub, a lockable storage zone, or a sheltered retreat for enjoying the outdoors in any season.
Investing in an under-deck drainage system doesn’t just protect a deck – it boosts functionality, comfort, and resale value for your clients. For design inspiration, installation tips, and clever ways to make the most of that extra space, visit TrexRainEscape.com.