That means we understand what factors will impact on your waterproofing in any location, which membrane is most suitable – and what brand will best do the job.
In the first of a series of blogs on waterproofing membranes, we take a look at waterproofing for roofing, and why the choice of membrane plays a major part in functionality – and longevity.
At the heart of every superior waterproofing solution is a quality membrane. A waterproofing membrane is a layer of material that forms a barrier against water penetration. It’s installed around building foundations to repel water and protect the building interior and structure.
Membranes come in two different forms: 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, to name a few.
And depending on the project, waterproofers may layer them above or below a concrete screed and/or between insulation and floor coverings.
Each type of membranes has specific properties, making them suitable for particular property types, areas and environments. Membranes need to have robust waterproofing abilities and be sturdy enough to withstand natural building movement and external factors like chemicals.
When the Danrae Group team decides on the best membrane for a roof, considerations will include style of property and location. A commercial or strata building, for instance, will likely need to withstand more strain than a residential home.
And the shape of the roof is also significant. Flat roofs obviously do not drain as angled roofs do, so they are more susceptible to water pooling.
Both adequate drainage and the correct type of membrane are critical. Any water that fails to drain from a flat roof can leak into interiors or seep into building foundations, potentially leading to issues such as concrete spalling and concrete cancer.
At Danrae Group, we design bespoke waterproofing solutions that also take into account roof usage. Our choice of membrane has varied for jobs ranging from inner-city apartments with a rooftop swimming pool and tennis court to a major hospital needing efficient waterproofing to protect sensitive equipment in a top floor clinic.
While every waterproofing roof project is distinct, our team would generally look for a membrane that has UV and heat-reflective properties. Options and benefits include:
Sheet membranes can be the most costly type of membrane but have a lifespan of up to 50 years.
Membranes are not fit-all solutions, which is why the best roofing plan will come from a team experienced in tailored waterproofing solutions.
At Danrae Group, our waterproofers are trained in every waterproofing technique and every type of membrane. And we have builders, carpenters and other tradies in-house.