the worker in overalls applies an insulation coating on the concrete surface. View from above.

Andersal waterproofed the Conservatorium of Music during heritage restoration with 12,000 square metres of membrane.


There is a statistic often quoted in the building industry: waterproofing makes up 1.8% of the total construction cost, but accounts for 83% of building defect complaints. If a structure isn’t adequately waterproofed during its construction, Anderson can protect it against future degradation by applying structural waterproof membrane systems. If you’re in the process of building a new structure, Andersal can ensure that the structure is waterproof from the get-go to eliminate the need for constant maintenance during the structure’s lifetime.

The team at Andersal work under a philosophy of designing and implementing long-term solutions that require minimal maintenance in the structure’s future. Our team will provide you with long-lasting, effective and economical concrete waterproofing solutions to suit your needs, making use of the highest-quality technologies and equipment to protect your structure against failure.

Key areas of application include:

  • Balconies
  • Terraces
  • Roof tops
  • Planter boxes
  • Walkways
  • Car parks
  • Retention walls and basement walls
  • Any other concrete area where water flowing through cracks can cause leaching and corrosion.

Andersal are not however resourced for internal waterproofing or minor repairs to private residences.

Why does Waterproofing Fail?

There are several reasons why concrete waterproofing may fail in a structure, including building movement, lack of contractor expertise, incorrect diagnosis and cost-cutting practices. Read more.

Why do you need Waterproofing?

Whether you’re constructing a new structure or making repairs on an existing one, selecting the correct membrane for the structure is crucial. Read more.

Waterproofing Solutions

To ensure a quality solution to your waterproofing problems, the following is required: a correct diagnosis of the problem, a selection of appropriate quality product and efficient installation by skilled applicators. Read more.

Waterproofing Projects

Andersal has successfully repaired a wide variety of waterproofing problems in almost every type of structure in Sydney. Read more.

Waterproofing Gallery

View some of Andersal’s concrete cancer restoration projects-in-progress in our photo gallery. Read more.