The internal wall-lining kit is a series of TrueCore® steel framing noggins and fastenings that make it faster and easier to attach plasterboard or similar wall-lining material to the TrueCore® structural steel building frame. Wall-lining kits are sold in lots of 18m2. For example, a flatpack habitable building kit of 36m2 with no internal walls would require 2x 18m2 lining kits for the internal lining of perimeter walls. Alternatively, the builder can make their own timber noggins and use suitable fixings.