foamed slag
expanded slag

Asbestos cement cladding panels are clearly expressed with metal flashings over a base course of foamed slag concrete panels, with windows and doors fitting within the module set up by the cladding.

There are Hamish prefabs (types 1 and 2), the Duplex Sheath prefab, the Bricket Wood Special prefab, the Blackburn Orlit prefab, and even a pre-fabricated gem known as the Foamed Slag.