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At Danrae Group, we’re sometimes asked about the different types of waterproofing in construction. When people speak about different types of waterproofing, what they’re really talking about is different types of membrane waterproofing.
Waterproofing membranes play the central role in any waterproofing solution by forming a barrier to prevent water ingress into your structure – and our team can advise you on a quality brand and the best type of membrane for your construction project.
A waterproofing membrane is a layer of material installed around building foundations to repel water.
There are two primary types of membrane: a liquid, such as water-based, solvent-based, cement-based and bituminous-based; or a sheet, which includes torch-on bitumen, PVC, Butynol or Peel and Stick.
Membranes are designed with specific properties that make them suitable for particular environments.
Polyurethane liquid membranes, for instance, are good for flat roofs or exposed areas. We generally use sheet systems for balconies and basement waterproofing. And bituminous coatings can be a good choice for concrete foundations.
A quality membrane will be durable, possess excellent waterproofing properties and be able to withstand natural building movement. The other factors will depend on your particular usage.
Under Australian standards, there are three classes of waterproofing membranes: rigid, flexible and elastomeric. The advantages and disadvantages for each these different types of waterproofing include:
Class I: Resin (fibreglass) systems and water-based epoxies
Class 2: Flexible Systems (acrylic liquid systems e.g., water-based membranes)
Class 2: Flexible Sheet (torch-on modified bitumen)
Class 3: Elastomeric Systems (solvent-based polyurethane)
Class 3: Elastomeric Sheet (PVC/TPO/Butynol/rubber)
The Danrae team is skilled in diagnostic, solution design, waterproofing, remediation and preventative maintenance. We stand apart from many waterproofers, thanks to our in-house trades experts and waterproofers who are trained to work with every type and every brand of membrane.
We oversee end-to-end project management in-house to ensure full compliance with Australian standards and to guarantee a high quality waterproofing solution every time.