Hello, this is Paul – Findlay-Evans Waterproofing, we’ve got a case study here on a concrete roof.  In this particular building, it’s Allied Mills in Melbourne.  The old membrane was basically out of its use by date which had probably been there since it was built. The downstairs of this roof was suffering from water ingress which is a big no no at a flour mill. So we had to stop the water.

The concrete roof was basically in good order but the membrane over it was gone. We had to remove the defective membrane system by a lot of manual labor.

Access was a bit limited in this job and quite high up. We scraped off all the old polyurethane membrane which was deteriorating rapidly. Once we removed the old polyurethane membrane off the roof we then went about cleaning the concrete roof to ensure we had a good bonding surface for the Liquid Rubber membrane.

Some areas were a little bit low so we screeded them up with special flexible screed. That then was over coated with Liquid Rubber membrane. To protect this concrete roof it’s important to make sure that Liquid Rubber is used because it’s a highly flexible membrane. The high flexibility allows the building to move and shake. Which in this case the building being quite tall moves quite a bit.

Once we had our Liquid Rubber down we put in a fiber glass inter layer to make it more robust. Then over coated the whole system with Thermo Top Coat. This reduces the temperature below quite considerably. Which helped with the internal ventilation.

Findlay-Evans Waterproofing

A Waterproofing Company That Thinks Construction

Registered Building Practitioner & Certified Waterproofers

P: (03) 8812 2918

E: info@waterproofingfew.com.au

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