Helifield Castle – Kemper System
Helifield Castle, Yorkshire
The refurbishment of this listed ancient monument, filmed for the TV programme ‘Grand Designs’, was managed and supervised by the architect-owner, who had purchased the building as a crumbling ruin following years of neglect. The ambitious plan, to refurbish the building as a family home, was completed over a period of 2 years. One of the key requirements for the Tower building was to effectively waterproof the flat roof and provide a large balcony area with a hard landscaped decorative surface using natural slate.
This was a listed building and choice of materials was critical to satisfy strict planning requirements as well as provide a long-lasting solution. In addition to maintaining the waterproof integrity of the balcony, the large box gutters to the parapet – originally lead – also required a sympathetic but reliable treatment.
Kemperol V210 – a BBA certificated system comprising resin-impregnated reinforcing fleece – was chosen to waterproof the roof underneath the decorative slate promenade tiles and was also used to line the box gutters and drain hoppers. This created a seamless, elastic membrane that could be easily formed, despite the complex shaping requirements, and at a significant time and cost saving. Whilst the architect involved was professionally familiar with Kemperol waterproofing as a flat roof repair material he had not previously used it for this type of application.
Using Kemperol cold liquid waterproofing not only reduced costs over the materials originally specified – which included lead for the box gutters, but contributed to a saving of some 8 weeks on the construction time, allowing the Pele Tower to be completed on schedule and creating an impressive family home in the heart of Yorkshire.