Specifier Review
Schöck and Hollowcore innovation benefits Stoke Extra Care scheme

Schöck and Hollowcore innovation benefits Stoke Extra Care scheme


A PFI Extra Care complex at Abbey Hulton village, outside Stoke-on-Trent, is another UK project benefitting from a faster build time using innovative off-site manufacturing. It combines Isokorb structural thermal break units from Schöck with the Hollowcore system.

Holdcroft Fields at Abbey Hulton, provides 175 self-contained one and two bedroomed apartments with extensive communal facilities for people over 55.

Designed to meet BREEAM Excellent standards, there are two linked three-storey blocks around two central courtyards and many of the apartments feature spacious balconies. So the prevention of thermal bridging is a critical consideration.

Quite apart from heat loss, condensation can lead to structural integrity problems and may even encourage mould growth, which has serious medical implications. One of the most effective countermeasures on the market is the Schöck Isokorb structural thermal break.

It dramatically reduces thermal energy loss in connective areas and enables inner surface area temperatures to remain well in excess of those likely to cause condensation.

To meet the steel cantilever requirements on the project, the Isokorb type KS14, for concrete-to-steel connectivity is being installed in conjunction with the Hollowcore floor system. The method involves the precasters breaking out selected cores and cast reinforcement bars in their works.

The thermal breaks are then fixed to a template, to match the broken out Hollowcore,. complete modules are supplied to site, dropped into position and the broken out Hollowcore filled with insitu concrete.

The Hollowcore has voids extending its full length, with a huge weight saving over floor slabs of equal thickness or strength, and efficiencies in transportation and material costs. With slab sizes on the project typically 1.2m wide by 7.5m long, they are also faster to install and provide an immediate working platform for following trades.

Hollowcore  - HR

The Isokorb type KS14 has verifiable performance values, providing BBA Certification and LABC Registration, as well as comfortably exceeding the requirements of BRE IP1/06 and Part L of the Building Regulations.

The temperature factor used to indicate condensation risk (fRSI), must be greater than, or equal to, 0.75 for residential buildings and this is comfortably met by incorporating the Isokorb.

Contact Schöck on 01865 290 890 or email: design@schoeck.co.uk