The basement of Fairfax Mansions in North London hadn't been used for some time. The building was being converted into a branch of the coffee house chain Caffè Nero and Ronacrete was chosen to waterproof the basement as part of the overall conversion. Harrison Waterproofing was contracted to carry out the waterproofing work.

After discussion with the Ronacrete technical team, Harrison Waterproofing recommended that Ronafix Mix E should be used to provide a BBA Approved, durable high strength waterproof render to the basement walls.

Ronafix admixture and Portland cement were mixed to produce a slurry to prime the brickwork and the first layer of render. Ronafix was used as the gauging liquid to produce Ronafix Mix Design E, a blend of Portland cement, sharp sand and Ronafix admixture. The render was trowel applied in two layers; day joints in the render were positioned so that joints in the second layer did not coincide with joints in the first layer, to ensure there was no direct path for water ingress through joints.