Decking in Two Rocks

Two Rocks is where the corridor ends. The marina opened in 1973 and 1974 as part of Bond Corporation’s Yanchep Sun City, the state’s first private residential, commercial and recreational investment project, and the Sun City precinct was heritage listed in 2023. For a long time the whole town lived within a couple of square kilometres around the marina. Since then the residential areas have pushed east and south-east into newer estates, and the Two Rocks Village shopping centre opened in June 2026. Deck work here splits between the 1970s and 1980s marina town and the new lots behind it.

Restoring a marina-town deck

The original Two Rocks houses have had fifty years of weather off the Indian Ocean, and many carry a deck that has been patched more than once. The contractor checks the frame first. On sand that drains, treated bearers and joists often outlast the boards above them, so the job is frequently a re-board: split and soft boards replaced, the rest sanded and oiled, and every corroded galvanised screw and hanger swapped for stainless steel. If the frame has failed, the deck is rebuilt on the same footprint rather than patched, and the contractor says so at the site visit. Our deck repairs and restoration page explains what the frame check involves.

First decks in the newer estates

East and south-east of the marina the lots are newer, with an alfresco under the main roof and a yard waiting for a deck. A low deck level with the alfresco slab, in composite for no upkeep or hardwood for warmth, is the usual job, with stumps in the sand and a picture-frame border at the lawn. In the City of Wanneroo all decking requires a building permit, regardless of height or floor area, so the permit is planned from the first visit, with the quote stating who lodges it.

Bushfire and BAL at the top of the corridor

We do not say whether Two Rocks is or is not bushfire prone. The DFES Map of Bush Fire Prone Areas runs through suburbs and is revised, so check your own address. If your lot is inside a mapped area, the deck is built to the BAL level of your assessment under AS 3959: bushfire-resisting hardwoods at the lower levels, non-combustible decking and supports as the level rises, and the gaps between boards and the space under the deck detailed to match. The permit application includes the BAL assessment.

Salt from the marina

The marina town faces the water and the whole suburb is within reach of the sea breeze. Stainless fixings throughout, 316 grade close to the harbour, frames kept clear of the sand with air underneath, and composite or oiled hardwood boards are the standard here.