Former World War I, Type G, RNAS seaplane shed

MATERIALS: steel frame, on a timber cill or brick plinth, on concrete foundations, clad in asbestos-cement 'Trafford Tiles' (manufactured by Turner and Newall, Trafford Park) and rolled steel sheeting. Steel stanchions.

PLAN AND STRUCTURE: 180 ft x 60 ft shed (80 ft 7 in, including the annexe), originally side-opening, set out in twelve, 15 ft bays, reinforced by external raking steel stanchions on the NE and NW elevations. Lower sections of cladding have been replaced in rolled steel sheeting. Clerestorey windows on the northern, eastern and southern elevations and on the annexe are ten-over-three pane, metal-framed units, one per bay. On the north-west elevation windows are continuous vertically lights. The original entrance on the north-west elevation has been in-filled and two sets of smaller ledge and brace timber doors inserted in the cladding, but the frame, stanchions framing the entrance and superstructure remain in place. There are similar doors in each gable wall. A full-height entrance has been cut through on the south-east elevation. Attached to the south-east elevation is a ten bay, lean-to, single-storey annexe that housed workshops and offices. The 7th bay from the south has been removed where the entrance has been cut through.

Steel truss roof. The south-eastern wall is clad internally in steel sheeting below window height. The doorway to the workshop remains in place. Concrete slab floor with caulked joints.