Parking Block Roof Garden, Queenstown
   
A Fully Planted Roof Garden: Photos Courtesy Eric NgProject Name: Parking Block Roof Garden, Queenstown
Year: 2004
Owner: Housing Development Board
Location: Singapore, Singapore
Building Type: Multi-Family Residential
Type: Intensive
System: Custom
Size: 678126 sq.ft.
Slope: 1%
Access: Accessible, Open to Public
Submitted by: Eric Ng

Designers/Manufacturers of Record:
Drainage: VersiCell
Roof garden to help reduce noise from traffic and rail (right).Choice of plants includes shrubs and trees.Drainage Cell on Membrane : VersiCell drainage modules horizontally installed on top of the waterproofing membrane.
Located at the roof level of a multi-level car-parking block, the Parking Block Roof Garden is in line with the government's initiative to further enhance Singapore's "City in a Garden" image. This roof garden is accessible to the public and is frequently used by residents for recreational activities.

Additional benefits the housing authority wants for a roof top garden:
- Reduce glare
- Reduction in ambient temperature
- Improve air quality
- Barrier to reduce highway traffic noice
- Improved aesthetics
As an intensive green roof, depth of growth media can be as thick as 1m in areas where trees are planted. This roof was designed to withstand the expected extra loading. A root-inpenetrable waterproofing membrane was used. To prevent damage to this membrane, the waterproofing contractor's scope of work was extended to the installation of the 30mm high VersiCell drainage cell. This drainage cell will not only act as the sub-soil drainage media for the entire roof with its high compressive strength, it also acts as a protective cover for the waterproofing membrane. A layer of geotextile was laid over before commencement of the landscaping works.

The provision of a 30mm high VersiCell drainage layer laid horizontally over the entire roof area allows effective transport of infiltrated rainwater into the rainwater down pipe and at the same time prevents waterlogging of the roof garden.

Additional thumbnail photos:

To learn more about the sub-soil drainage system visit www.versicell.com and the corporate website: www.elmich.com.
 
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