A quarter sample of a 1220 x 305 x 57 mm insulating concrete form. It is made up of two EPS foam plastic panels with slots for injection moulded high density polyethylene ties and two such ties. The EPS panels are moulded in such a way that they can be slotted together. The ties slot into them and hold them at the correct distance from each other.The concrete is poured into the chanel between the panels. The panels insulate the concrete on both sides. The resulting wall retains heat twice as well as that of a traditionally built wall. Invented in 1994, this sample was made for Quad-Lock Building Systems Ltd, Canada, in their USA factory, in 2010. Product brochures and specifications are stored with the artefact.