May 01, 2019

Using Liquid Rubber Spray On Roof Waterproofing Membrane 

Best Method to Fix Leaking Flat Concrete Roof Slab 

  • Liquid Applied Waterproofing Membranes are the new generation state-of-the-art product providing permanent waterproof coatings for leaking roofs.
Melbourne- waterproof membrane for roof leaks

Solution to Fix Leaking Concrete Roof -VIDEO

Video Transcript - Case Study

Hello this is Paul Evans, Findlay-Evans Waterproofing. We got a case study here on a concrete roof. Which is, in this particular commercial building Allied Mills in Melbourne. To basically tell the truth, by date the membrane system that was applied to flat concrete roof  when probably when it was originally built, the downstairs of this roof was suffering from water ingress, and being a flour mills, was a big no-no. You can't mix water and flour, everyone knows what happens there. So we had to stop the water leaks. The concrete roof basically was in good order, itself. But the waterproof membrane was leaking. So we had to remove the defective waterproof membrane system by a lot of manual labor by scraping it off in this situation. Access was a bit limited on this job, and quite high up, as the images can show. We used mechanical scrapers to actually remove all the old polyurethane membrane which had deteriorated rapidly. And once we removed all the polyurethane membrane off the concrete roof, we then went about cleaning the concrete roof again, to insure that we had a good bonding surface for the new liquid rubber membrane. Some areas needed some repaired traction screed, a bit allowing areas, so we screed them up with a special designed flexible screed, and that then was overcoated with a liquid rubber membrane. To protect this concrete roof, it's important to make sure that a liquid rubber is used, because it's a highly flexible membrane. This high flexibility allows the building to move and shake. This building actually being so tall, moves quite frequently, unbeknownst to the naked eye, but it does move around a fair bit. So, just wind applying on the building causes vibration and movement. That movement is then taken up by using liquid rubber, which is highly flexible. Okay, so once we got one layer of liquid rubber down, we put an interlayer of fiberglass mesh into it again, to toughen it up. Then overcoated the whole system with a thermal top coat. This reduced the temperature below the concrete roof quite considerably by approximately 80 degrees, which helped with internal ventilation basically in keeping the place cool inside during summer months. The system was fully overcoated with our thermo to produce a nice gray finish, which is pleasing on the eye, as well as thermally reflective. This job turned out to be quite good, everybody was pretty happy with it, and worked out well in the end,

So, if you got any questions, please give us a call here on 03 8812 2198 or our website, is

Roof Coating for Leaking Rooftop Deck - Audio

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Waterproof Coating - Liquid Rubber Roof Membrane 

  • Liquid Rubber can be applied vertically and horizontally - around all roof penetrations and rooftop deck utilities. 
  • Spray applied waterproofing can be applied directly on the existing roof surface. 
  • This will restore a leaking and deteriorated roof back to life without removing the old membrane - saving costs and time.

Infographic  - Solution for Roof Leaks 

Waterproofing Membrane to Repair Leaking Flat Concrete Roof Slab-Melbourne CBD-infographic_optimized (2)

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