Georgina Crothers uncovers the innovative ways insulated concrete formwork can be used to create striking architectural features

Nudura’s ICF system was the ideal structural option for this wow factor self build on a sloping coastal plot, designed by VESP Architects

Insulated concrete formwork, otherwise known as ICF, is a modern method of construction that’s a great option for creating bespoke homes, thanks to its extensive range of design possibilities. The innovative build system involves stacking a series of hollow blocks made from expanded polystyrene or woodfibre-cement, which are then reinforced, braced and filled with ready-mixed concrete. “You construct the shape of building you want and, once the concrete is poured into the block core, you have your walls,” says Chris Oram, technical sales at ICF Supplies. The blocks themselves offer built-in insulation and a variety of claddings and renders can be used for the finish.

The build process is straightforward and speedier than traditional masonry systems, as the polystyrene blocks are quickly stacked together with no need for mortar. The system’s pre-insulated walls and full-fill concrete pour offer excellent U-values and airtightness. However, one of ICF’s most appealing benefits to self builders and architects alike is its unique design possibilities. “The monolithic nature of the concrete affords an immensely strong build, creating the opportunity to form extraordinarily wide openings and remarkable cantilever designs, with the comfort in knowing that the airtight nature of your property is supported by the highly robust materials you’re building with,” says Chris. From curved walls to vaulted ceilings, there’s a lot of design scope with this build system. Here, I’m looking at a range of wow factor examples of what can be created with ICF, and how they were achieved.