Waterproofed Basement for Caffè Nero

In brief

A basement in North London which had not been used for some time needed to be waterproofed as part of a conversion project.

The project

The basement of Fairfax Mansions on the Finchley Road in North London had not been used for some time although it had previously housed a café. The building was being converted into a branch of the coffee house chain Caffè Nero and the basement needed to be waterproofed as part of the overall conversion. Harrison Waterproofing was contracted to carry out the waterproofing work.

Waterproofing basement

Ronafix Mix E


Product and application

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. Harrison Waterproofing prepared the surface by scabbling with a bush hammer to provide a mechanical key for effective bonding of the render; glass fibre mesh was used locally over brickwork of uncertain quality. 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.


The basement was given a new surface finish using Ronacrete Ronafix Mix E polymer modified render, providing a securely bonded durable waterproof render, ready for interior decoration.  Ronafix site batched polymer modified renders (including Mix E) are covered by BBA Certificate No. 85/1651.

Ronafix Mix E is also available as Ronafix Pre-packed Tanking Render.

About Ronacrete

Ronacrete is an international manufacturer of specialist construction products with factories and development centres in the UK and the Far East. Accreditations include BS EN ISO 9001, BS EN ISO 14001 and OHSAS 18001, offering specifiers the opportunity to gain BREEAM and Code for Sustainable Homes credits. Market leading brands include SuDS compliant RonaDeck resin bound products for paving and tree pits, Ronafix admixture and Ronafix modified pre-packed mortars with BBA approvals for screeds, renders, concrete repair and bedding. Ronacrete produces materials for; resin bound and resin bonded hard landscaping, polymer modified and fast drying screeds, waterproof renders and coatings, concrete repair and protection, waterproof bedding mortars and resin flooring. www.ronacrete.co.uk
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1 Response to Waterproofed Basement for Caffè Nero

  1. Good article and the floor seems good aswell!

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