Basement Waterproofing Perth

What is basement waterproofing? 

Below ground waterproofing is as vital as the structural foundations which support a building.  A building will deteriorate very quickly without a combination of watertight footings and foundations.  The below ground waterproofing of foundations, basements, footings and retaining walls are most often not accessible to complete repairs and therefore must be built to last for the entire service life of the building.

 Moisture is the biggest factor in the corrosion of reinforcing steel within concrete and, given enough back pressure, water can penetrate perfectly intact concrete.  Therefore, it’s crucial that the concrete be kept dry and protected in order to maintain the integrity of the structure itself. The solutions must be able to last the expected design life of the structure and longer.

Waterproofing is a requirement under the Building Code of Australia for structures that are built at, or below, ground level and are subject to ground water pressure.   If there is insufficient external drainage or a waterproofing failure, water will penetrate. All structures including residential homes, high rise commercial building and apartment buildings require basement waterproofing to prevent against water ingress.

In recent years there has been a dramatic increase in the construction of multi-storey buildings, commonly mixed-use and residential tower developments, in Australia. In these developments the basement structure is generally used as carparks, storage areas and utility areas and therefore require long term basement waterproofing solutions; it’s not commercially viable, or even possible in some cases, to upgrade or fix a failed waterproofing system in a basement of one of these structures.


    Did you know that currently waterproofing is unregulated in WA? How do you know who to trust? Read more...

    What causes water ingress in below-ground basements?

    Water ingress in below-ground basements can result in damage that often take years to develop and may not always be visible.  However, over time there will be multiple signs of water damage that could lead to structural failure; these signs may include:


    The cracks may be vertical, horizontal, diagonal or stair-stepped and the widening of cracks indicate that water is putting pressure on the structure.


    If your basement develops musty odours that cleaning, dehumidifiers and added ventilation do not remedy, then it’s a very good sign that there is a water leak.

    Mould Growth

    This fungus grows in damp dark areas and may cause respiratory problems over a long period of exposure.

    Buckling Walls

    The walls appear bowed inward and this is usually caused by hydrostatic pressure.


    This is a white, powdery residue that’s generally found on basement walls near the floor.

    Peeling Paint

    When water seeps through walls, peeling or bubbling paint is evident along the basement walls.

    Why is foundation waterproofing important?

    Leaking water into the foundations of a building pose a range of problems including mould/mildew, damage to the structural integrity of the building, lead to insect infestations, degraded air quality, damage to floorings, furnishings and electrical systems.  These water leaks commonly occur when water pushes through cracks in foundation walls and basement floor.

    Effective below ground waterproofing can only be achieved by careful design, the correct waterproofing materials and professionally installed systems that provide quality control on site.

    How much does it cost to waterproof a basement?

    The cost to waterproof a basement is dependent on the size of the area, the type of system to be installed, the preparation works to be completed and any defects that require repairing.

    below ground basements waterproofing

    How BUSS can help

    Drawing on our experience and industry best practice, BUSS’ waterproofing specialists have been applying their expertise for more than 20 years to commercial, industrial and residential structures in Perth and the metro area. 

    Our proven track record in waterproofing solutions and quality workmanship, supported by our affiliation with leading industry organisations – Australian Institute of Waterproofing, the Australasian Concrete Repair Association and the Strata Community Association, along with our Cert III accredited applicators, offer our clients peace of mind for all their waterproofing needs.  Our association with these leading organisations allows us the advantage of being one of the most qualified, trusted and reputable remedial contractors in WA.

    Our waterproofing services include:  leak detection, site advice/investigation report, solution/scope of work, corrective actions and repairs, waterproofing and general consultancy.  For more information, contact us below or call 08 9444 1732 for more information.

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