When it was discovered that an external concrete staircase was leaking and allowing water ingress into an a swimming pool area below, Cemplas Waterproofing and Concrete Repairs Ltd were called in by Roak and asked to propose a remedial prevention measure.

The existing paving and finishes were removed to reveal the concrete substrate which was then inspected by Cemplas surveyors who specified the application of Tremco's MMA Waterproof Coating system be applied directly to the concrete substrate to form a Waterproof barrier.

Cemplas were instructed by Roak Ltd to undertake the works and were given a tight program of completion. Due to the current weather condition Cemplas carefully monitored the weather forecast and chose a suitable day to undertake the works ensuring enough operatives were on site to endeavour to complete the works in one day. 


Cemplas prepared the existing concrete by grinding and then applied Tremco CP150 MMA Concrete Primer which was followed by applying Tremco CP360 MMA Waterproof Membrane incorporating a fleece reinforcement. To complete the waterproofing, Cemplas applied Tremco CP930 Waterproof Sealer which was broadcasted with quartz aggregate for to provide a key for the subsequent screed topping.

Many buildings today incorporate below ground structures such as basements, habitable space to car parking, and in this instance a Swimming pool, however whatever the usage a survey by a Cemplas (C.S.S.W) (Certified Surveyor in Structural Waterproofing) will ensure the correct waterproofing system is selected as often there are many considerations to take in to account including deck movement, differential movement, drainage, waterproofing continuity at expansion joints, drainage outlets, landscaping, and most important what is below.

www.cemplas.co.uk