Schöck and Marble Mosaic team up for 345 precast balconies

Horizons is a recent addition to the skyline on the north bank of the Thames adjacent to Poplar Dock. It offers 190 private apartments with one, two and three-bedrooms, plus six penthouses. There are a considerable number of balconies involved on the development, so minimising any possible thermal bridging problems was crucial.    The Schöck Isokorb structural thermal break comfortably met the necessary specifications and precast balcony specialists Marble Mosaic had a big part to play as well.

Marble Mosaic specialise in precast concrete cladding panels and structural units for new buildings. Joint MD Dennis Vittle comments:

“We have been associated with Schock projects for many years and Horizons required the balcony units to be integral with the main structure, insulated and fire-stopped from it. The Schock Isokorb type K was the natural solution.   There are 345 pre-cast balconies on the project which posed a number of challenges.   There were standard insulated balcony-to-slab connections and a number of downstand and upstand connections required. Also the precast columns were supported off the balcony slab at one end only, so there was a heavy eccentric shear load transfer.   The agreed design called for a combination of Schock Isokorb types K and Q to ensure structural integrity with the frame, whilst avoiding any clashes with the concrete frame reinforcement”.

The Isokorb type K is a load-bearing thermal insulation element for concrete-to-concrete cantilever balconies, which transfers bending moment, stress and shear forces. The Isokorb type Q serves as a shear force transfer element for loggia’s or column supported balconies with relatively low load expectations.

The range of Schöck Isokorb solutions guarantees totally verifiable performance standards and meets full compliance with the relevant UK building regulations.

For a free copy of the Schöck Thermal Bridging Guide and / or the Thermal Bridging Solutions brochure – contact the company on 01865 290 890 or visit