ABSTRACT
Insulated concrete formwork comprises interlocking hollow insulation blocks to make a formwork for in-situ reinforced concrete to be poured in the centre. It is quicker and easier than solid masonry construction and offers a good level of performance and design flexibility. The concrete forms the airtight layer and continuous insulation is easy to achieve with simple detailing. The ground floor concrete raft is poured onto a rigid insulation formwork which allows continuous insulation and minimal thermal bridge at ground floor perimeter. The concrete is the airtightness barrier so the window frames should be taped to the concrete. Internal and external insulation to the reveals mean this detail performs 98% better than the normal default detail. Sunscreens, louvres or canopies need to be fixed back to the structure. This thermal bridge can be prevented by designing a separate supporting structure or by specifying a thermal break.
