Flat Concrete Roof Waterproofing in Cape Town

Our solutions for flat or concrete roof waterproofing are unmatched. The product forms a rubberised, UV resistant membrane that will take care of your roof and waterproofing problems for the next ten years. All our products are applied using a two colour system to ensure total coverage. The finish is decorative and also has temperature and noise regulating properties.

If your screed levels are not what they used to be due to settling, we have a special product that can handle ponding water until it dries out naturally. With an elongation at break of 400%, the membrane can withstand the expansion and contraction that takes place on flat concrete roofs. All crack and joints are made good and sealed using a polyurethane mastic that can expand and contract with the substrate. We also make use of a non woven membrane that is very strong and difficult to tear. Below are the steps required to Waterproof new concrete flat roofs as well as removal of existing torch on systems before application of our solution.
Clean surface and ensure it is free from loose dirt, debris and oil.
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Application of Epoxy Primer to ensure good adhesion between substrate and product
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Seal all joints and outlets with polyurethane mastic and non woven membrane.
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Application of seamless rubberised waterproofing under coat.
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Application of seamless rubberised wateproofing Top coat
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Application of non-slip trafficable coat as an option.
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Wateproofing Flat / Concrete Roof with existing torch-on

Torch-on repaired roofs do not react well to ponding water. other weak points are the overlaps and hairline cracks that form. The product is also inflexible making it diffiult to apply on joints and corners. The product is not UV stable and requires maintenance of the silver paint every 2-3 years. Here is an example of changing a torch on roof to rubbe rmembrane.

Existing torch-on is removed and the surface thoroughly cleaned.
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Sealing of all joints, gaps, outlets and corners with polyurethane mastic.
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Application of primer to ensure bond between substrate and product.
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Application of membrane on all joints and cracks.
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Application of seamless rubberised wateproofing 1st coat
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Application of nthe 2nd coat of rubberised membrane.
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