Design of the building envelop is important to a sustainable building or structure. For the museum of coastal defence, element like temperature, lighting and relative humidity are important, in order to keep the artifacts and exhibited items in a good condition. Having a comfortable environment for visitors is also significant for each museum.

Plain concrete cladding

The reception building is clad with plain concrete which reflect the simplicity of a military installation.

Glass wall panels

The upper part of the redoubt is enclosed with full-height glazed. This feature welcomes sunlight to the viewing gallery. Visitors can enjoy the beautiful sea view of the Victoria Harbour through the redoubt.

Tension Structure

The tension structure is roughly circular in plan with a diameter of about 42m. It covered the entire redoubt including the courtyard which was once an open area for assembly. This feature can facilitate control of temperature and relative humidity inside the museum for preserving the artifacts in a good condition. This also prevents direct sunlight and rain which protect and prevent the heritage from further weathering.

The fabric roof is made of PTEE (Teflon) coated with fiberglass. It is fully waterproof and can block out wind and sunlight. 4 central masts positioned in the courtyard and 21 peripheral anchorage tripods connected by cables are structural supports for the fabric roof. The fabric roof is connected to the glass wall panels by a single later PVC flap. This elastic flap allows considerable displacement of the fabric roof under different wind loads.

Other than the fact that sturdy canvas often associated with military aspect, it is easier to transport the light material to the summit of the hill. This quantity of construction material can minimize the intervention induced from the construction works of the cover for the Redoubt. It is good for the environment and the construction cost is also reduced.

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