Leaking Balcony Perth

Leaking balcony repairs and remediation

Being constantly exposed to the elements, balconies are vulnerable to water seepage which lead to a leaking balcony.  Since the construction of each balcony is unique, the risk of water ingress is very likely if the waterproofing system doesn’t accommodate the design of the balcony.  Balconies require appropriate drainage and isolation from the internal elements of a structure, with a proper waterproofing membrane installed to prevent leaking. 

A leaking balcony may be fairly common, but it’s extremely serious because of the potential for it to cause structural/substrate damage and water ingress into the property’s interiors.  Additionally, a leaking balcony can present an extreme liability due to the safety risk posed to tenants/residents. The risks associated with leaving a leaking balcony untreated include:

  • Water penetration to the surrounding external walls
  • Visible water penetration in spaces above or adjacent to the balcony
  • Damage to electrical systems with the potential to cause power outages or dangerous charges
  • Potential balcony collapse

How much does it cost to fix leaking balconies in Perth, WA?

Each balcony is unique and as such leak sources and repair solutions vary accordingly.  Age, location, weather exposure, complexity of the balcony design and level of damage will ultimately determine the cost associated with repairing your leaking balcony.   You are welcome to contact BUSS’ professional waterproofing team who are available to provide you with a free assessment/inspection and quote.


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

    What causes a leaking balcony?

    Minimal Falls

    Balconies in multi-level buildings tend to have minimal falls to the substrate and inadequate subfloor drainage; as a result, an incorrect waterproofing membrane system, improper installation or unsuitable tile adhesion has a significant effect.

    Lack of control/expansion joints

    Adequate expansion joints are essential to decrease the risk of tiles moving against each other and popping during hot weather.  If this occurs, the adhesive and the membrane may break, allowing water to penetrate, which will compromise the integrity of the concrete structure and other building materials.

    Damaged and Failed Membrane

    Damage to the membrane at the time of construction, unsuitable membrane system, inadequate preparation methods, incorrect installation procedure, thermal changes in temperature or long-term building movements.

    Loose, cracked or missing tiles

    Allows water to penetrate substrate and surrounds.

    Cracked or missing grout

    Allows water direct access to your membrane.

    Incorrect tile installation

    Including grout that’s incompatible with the membrane, can leave your perimeter joints exposed and allow water to penetrate your surrounding walls.

    How to fix a leaking balcony?

    A few of the symptoms of a leaking balcony can be fixed by replacing loose, cracked or missing tiles and/or by replacing cracked or missing grout. While either of these are genuine repairs, they do not resolve the source of the leak.  Over the years BUSS have witnessed similar instances where signs of a leaking balcony had been repaired, but the source of the leak had not been addressed. These types of repairs serve to conceal the source of the leak, usually a defective waterproofing membrane located underneath the tiles, however water continues to penetrate the structure. The level of damage continues to increase and the cost of repair climbs.  Ultimately, a leaking balcony left unattended will compromise the structural integrity of the building.

    The best approach to fixing a leaking balcony is to engage a professional waterproofing contractor to complete an inspection so as to identify the source of the leak and the most appropriate repair solution.  A waterproofing specialist will have the skill set to determine the most suitable waterproofing membrane system for the balcony design – one that will withstand the structural movement and seal it from the elements, carry out the technical procedures involved in the repair ensuring it adheres to current Australian Standards, and advise of any additional works that can alleviate other potential issues including drainage, overflows, etc.

    BUSS highly recommend that home/building owners be aware of a leaking balcony. Completing routine visual inspections for signs of any leakage is a good idea but we advise that you do not wait until the damage becomes irreversible to act on needed repairs.  The sooner the problem is diagnosed and the cause determined, the less damage that occurs and the cheaper the repairs may be.

    Why DIY leaky balcony repairs are not recommended

    One of the main causes of a leaking balcony is the failure of the waterproofing membrane – primarily due to the selection of an incorrect waterproofing system, inferior materials, damage or deterioration to the membrane and inexperienced individuals completing the repair and/or installation.  In recognising a potential balcony leak by a loose, cracked or missing tile and/or cracked or missing grout, it’s common practice for homeowners or building maintenance managers to opt for a DIY repair; to them it appears relatively simple and provides a cost saving measure. However, in a vast majority of cases, completing this repair does not rectify the problem as the waterproofing membrane underneath the tiles is usually defective and replacing tile and/or grout only serves to cover the damaged membrane system not repair it, thus allowing water to continue to penetrate; effectively treating the symptoms and not the root cause.  

    A leaking balcony is a complicated problem and involves many technical procedures, the use of specific tools and specific products for each balcony design and therefore should be completed by a waterproofing specialist.  It is crucial that an assessment be carried out on the balcony so as to source the cause of the leak before recommending solutions that adhere to current Australian Standards; this will also prevent the owner from incurring unnecessary expenses for unnecessary works.

    leaking balcony


    Drawing on our experience and industry best practice, BUSS’ team have been servicing our clients in the commercial, industrial, residential, mining and resources market for more than 20 years.  Our specialist remedial team have been applying their expertise in completing condition assessments, creating action plans to remediate issues, developing repair methodologies, providing product recommendations and undertaking repairs via trusted techniques to eradicate underlying problems and renew assets to their desired state for our clients.

    Our proven track record in effective remedial 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 remedial repairs.  Our association with these leading organisations allows us the advantage of being one of the most qualified, trusted and reputable remedial contractors in WA.

    Servicing Perth and the metro area, BUSS’ waterproofing specialists have extensive experience in identifying leak sources, applying the latest waterproofing techniques and restoring a leaking balcony back to a safe and aesthetically pleasing condition.  Additionally, if your balcony contains damaged or leaking planter boxes, our waterproofing team can repair them and ensure they are completely impenetrable by water. For more information, please feel free to contact us below, or call us on 08 9444 1732.

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