Back to back brick chimney suitable for timber frame, steel frame, ICF (insulated concrete formwork)
and masonry construction. The design allows both chimneys to be built without breaking into the
timber frame or steel frame party wall. The two chimneys remain independent of each other until
they reach the top of the party wall. Then using a reinforced steelite lintel they join together to
become one, externally above the roof level. A cavity tray is recommmended but not automatically
supplied in the kit.