 The walls are constructed of timber framing.There are 7 external concrete buttresses along each wall, between which there are 5 pairs of timber bi-fold doors with skylight over.On either side, beneath the roof line, there are 7 high level panels of later metal vertical louvres providing cross-ventilation to the auditorium, with remnant panels of timber lattice above, which have been sheeted from the inside of the auditorium.