Case Study: Applying PU Waterproofing membrane over a damaged rooftop

The problem: Old structure (over 40 years) located in a historic part of Athens. The roof’s surface was made up of cement tiles. Many of the tiles had become loose enabling water to creep underneath between the tiles and the cement. The customer was looking for solution without needing to replace the entire roof.

The solution: Three layers of Anydron 2K PU Waterproofing Membrane reinforced with a fibre sheet.

The process: The first step involved removing any loose tiles and filling that area with fast-setting cement. The cement was reinforced with KTISOPLAST in order to give it better adhesive and waterproof qualities. Once the patch work was complete the entire roof was ground in order to remove all mould, grass and dirt.

Most roof leakages are formed along the joints. Therefore rounded cement coves were constructed perimetrically around the roof to prevent water leaking in to the joints.

One Coat of Ktisepox Hydro PR was applied as a primer on the entire roof.

The first layer of Anydron 2K was applied. While the liquid was still wet, fibre sheets were laid on top of the membrane. On the next two days the roof was coated with two more layers of PU Waterproofing Membrane Anydron 2K thus completely covering the fibre sheet.

The final result was a very strong elastic layer of Anydron covering the roof from edge to edge. Total consumption of the product was around 2kg/m2.

For more information on Anydron 2K watch this video here