Prefabricated timber framing was site-insulated with recycled newspaper (Warmcell) (for separated stud construction, U = 0.167W/m 2K). This is the super-insulated, lighter-weight, faster response pavilion. The interior finishes are either plaster or, on the interiors of the external walls, birch-faced ply. It's an odd effect in rooms and corridor, even when you have worked out the logic.
Overall it is breathing-wall construction, something Architype has developed. The timber-board cladding detail (developed with the Timber Research and Development Association) is an interesting one, coping with red cedar boards which were cut six weeks before installation in the Forest of Dean, and so will undergo considerable moisture movement. A specially profiled batten allows one-nail fixing: the process of nailing through board and batten pushing this batten against the head of the board below, holding it by friction at that point, so it can move (see detail, left).