Healthy Building, High Peformance Materials, Sustainable Homes. Faswall® is a non-toxic healthy building system, similar to Insulated Concrete Form (ICF) Blocks, made with recycled materials with a 25 year track record for high performance construction by innovative builders. Building with Faswall Eco Block Building System is Easy. It is a similar process to building with Insulated Concrete Forms (ICF Construction). The big difference is that Faswall® is non-toxic, recycled and super energy-efficient. It is a proprietary and patented insulated wood fiber-concrete wall form made of recycled pallet wood with no plastics. With unmatched thermal properties, it is ideal for building highly energy-efficient, durable, and sustainable homes and