Polarwall is a unique ICF that out-performs every other build system in terms of thermal and system strength and all-round build performance. It is totally different to every other ICF which are all moulded EPS blocks. As a plank ICF, we are able to use superior XPS boards, without the limitations of modular connections, thus giving total freedom to both designer and builder. With free online training for self-builders its no wonder they give us good reviews on the builder forums!