As with all balcony constructions, the issue of cold-bridging (also known as thermal-bridging) must be addressed and minimised to meet the required building standards - Part L of the Building regulations being of particular relevance.
The H-BAU ISOPRO® thermal insulation element from J&P solved this problem by providing structural connection between the internal concrete floor slab, and the external concrete (insitu, or precast) balcony, whilst creating a thermal break to minimise cold-bridging.