Car park decks are a particular type of roof terrace where vehicles of various sizes can move and park on a paved surface.
Rooftop parking is practical way of utilising the often large, flat surface roof area of commercial buildings, such as shopping malls, and residential buildings, where land area is at a premium.
ADVANTAGES OF INVERTED ROOFS FOR CAR PARK DECKS
The main advantages of an inverted roof construction where there is access for vehicles are as follows:
- installation of the waterproof layer directly on the solid slab
- mechanical protection of the waterproof layer with insulation laid on top
- application of thermal insulation with high compressive strength
The use of high-strength Ravago XPS insulation boards offers economical and simple structural solutions with long durability for car park decks.
This type of flat roof is usually exposed to higher static and dynamic loads than normal roof terraces, due to the concentrated wheel pressure from vehicles, and the dynamic effects of sliding stresses arising from their movement.
- consistently high thermal insulation levels
- water and frost resistance
- high compressive strength
- high resistance to vapour diffusion
INSTALLATION OF CAR PARK DECKS
The order in which the layers are installed is identical to pedestrian accessible terrace roofs up to and including a breather membrane above the insulation.
Thereafter the layers above must be capable of spreading and coping with the higher dynamic loads presented by moving vehicles.
The project structural engineer should be consulted on the final choice of the appropriate insulation material and construction.
Drainage should be provided to all layers of the roof build up above the water proofing layer.