Concrete waterproofing Sydney

Concrete waterproofing in Sydney ranges from $3,000 for localised treatment to $15,000 or more for large structures. Costs depend on the area, method selected, and condition of the concrete. Crystalline systems are typically $40-$60 per m², while membrane systems range from $60-$100 per m². We provide free assessments across Sydney.

Crystalline waterproofing uses reactive chemicals that penetrate into concrete pores and form insoluble crystals when exposed to water, permanently sealing the concrete matrix. It is highly suitable for Sydney conditions as it self-heals minor cracks and performs well in the city's variable moisture conditions. Products like Xypex and Krystol are widely used on Sydney projects.

Yes. We specialise in both new construction and remedial concrete waterproofing across Sydney. Existing concrete can be treated with crystalline coatings, injection systems, or applied membranes depending on the water source and structural requirements. A thorough assessment determines the most effective approach.

Crystalline waterproofing becomes a permanent part of the concrete matrix and lasts the life of the structure. Applied membrane systems on concrete typically last 15-25 years in Sydney conditions. Injection repairs can last 10-20 years. The longevity depends on the method, product quality, and ongoing maintenance.

Concrete waterproofing is required under the Building Code of Australia for any below-ground concrete, wet areas, balconies, and roofs. For new Sydney builds, integral crystalline admixtures or applied membranes should be specified during construction. This is far more cost-effective than remedial waterproofing later.