The space beneath a raised deck can be useful, but it can also become the least attractive part of an outdoor area. Open joists, stored equipment, bins and uneven ground are all visible from the garden. Deck skirting is a practical way to finish that space while improving the appearance of the whole backyard.
For Sydney homes, the best solution is not simply to close everything in. The design needs to allow ventilation, manage rainwater and remain accessible for maintenance. Here are the main options and decisions to consider before adding skirting to a new or existing deck.
What is deck skirting?
Deck skirting is the screening or cladding installed around the lower edge of a raised deck. It can be made from timber battens, hardwood boards, composite panels, metal mesh or a combination of materials. The finished result hides the subfloor while leaving enough airflow and access for the structure underneath.
Skirting can be purely visual, or it can help create a more usable storage zone. It should not be treated as a substitute for proper structural work, waterproofing or termite protection. Those details need to be resolved as part of the overall deck design.
Timber battens for a light, modern finish
Vertical or horizontal timber battens are one of the most flexible choices for Sydney decks. The gaps between battens create airflow and keep the screening from looking heavy, while the timber can be stained to match a hardwood deck or painted for contrast.
Vertical battens often make a low deck feel taller and suit contemporary homes. Horizontal battens can emphasise the width of a deck and work well across a long boundary. The spacing should be planned carefully: very wide gaps may not hide stored items, while very tight gaps can reduce ventilation and collect leaves.
Hardwood boards and solid-looking skirting
For a more substantial appearance, narrow hardwood boards can be installed as a carefully detailed screen. Spotted gum, blackbutt and merbau are common choices around Sydney, although the right timber depends on exposure, existing materials and the desired maintenance schedule.
A solid-looking screen still needs ventilation behind it. A builder may use concealed gaps, a ventilated lower section or a framed access panel so moisture does not remain trapped around the joists and bearers. The bottom edge should also be kept clear of damp soil and designed to shed water.
Composite and low-maintenance options
Composite decking boards or matching cladding can create a consistent look with a composite deck. This can be attractive for homeowners who want to reduce regular staining and oiling, particularly on a shaded side of the house where drying can be slower.
Composite products still need correct framing, fixing and expansion allowances. They should not be installed directly against the ground, and the manufacturer’s ventilation requirements should be followed. Matching the colour of the deck above can make the skirting recede, while a contrasting tone can turn it into a design feature.
Access doors, storage and services
Before the screening is fixed, identify anything that may need future access: stormwater points, electrical services, irrigation, pool equipment, pumps and structural connections. A discreet hinged or lift-out panel is much easier to plan during construction than to retrofit later.
If the area under the deck will be used for storage, it needs more than a screen. Consider a raised, well-drained floor, weather-resistant doors and enough clearance to move items in and out. Do not store materials against timber posts or block ventilation openings.
Drainage and ventilation matter
Closed-in skirting can redirect rainwater and create a damp pocket beneath the deck if the ground falls toward the house. The surrounding surface should drain away from the building, and the deck design should not cover inspection points or interfere with existing stormwater paths.
Ventilation is particularly important for timber structures. Air needs to move through the screened area so moisture can dry after rain. This helps reduce the risk of mould, decay and deterioration of the subfloor. A site inspection is the right time to check levels, soil conditions and any signs of existing moisture.
Does deck skirting need approval?
Requirements depend on the height and location of the deck, the property and the proposed construction. Skirting can also affect fire separation, boundary conditions and access around the building. In Sydney, it is sensible to confirm the approval pathway before work starts rather than assuming a screen is automatically exempt because it is not a roofed structure.
A qualified local deck builder can review the existing structure, explain suitable materials and coordinate the skirting with the deck, stairs and drainage. For a tailored assessment, contact 5 Star Decking AU on 0433 334 415.
Make the underside part of the design
Good deck skirting should look intentional, breathe properly and remain serviceable. Battens suit a lighter architectural finish, hardwood gives a natural appearance, and composite or metal options may reduce ongoing maintenance. The best result comes from planning the screen alongside the structure, drainage and access—not adding it as an afterthought.
5 Star Decking AU is a licensed NSW contractor, licence number 395250C, providing deck design and construction across Sydney.
