|This is a five storey multi family unit approximately two years old in Brooklyn, New York. The owners of the penthouse floor approached Holly, Wood and Vine, LTD to design and install a garden for their extensive terrace spaces surrounding the apartment. These surfaces were at the time covered in a silver roof membrane and surrounded by parapet walls.|
Marie Viljoen, the garden designer for this project, suggested that the family break the different areas of their wrap-around terraces into separate-use gardens: a playtiled space for the children to put their recreation equipment on, a gravelled fruit and vegetable garden (planted in containers), a deck area for entertaining, and, on a separate terrace, a greenroof. The master bedroom opens onto this terrace and the parents asked for a private space where they could sit and escape from the rest of the world.
They both responded positively to the idea of a greenroof. They liked its low-maintenance aspect; its aesthetic appeal, and the environmentally positive effect of greenrooves in general. The greenroof was completed on July 20, 2005 and the cost was about $18/sf.
|We used two rolls of GRS J-Drain manufactured by JDR Enterprises. Each roll is 50' L x 4'W. Additionally we used filter fabric for the first 5" of the silver membrane walls to retain soil paticles that might wash out. |
For the planted areas 100 bags of Fafard container mix and 20 bags of sand were used as the growing medium. Because it is a new buiding contructed with steel I beams, weight was not a major issue, and the average weight is about 13 lbs per square foot, at a planting depth of 4 inches. For the path and seating area we used 36 bags of river gravel.
100 Sedum tetractinum, 1 qrt
100 Sedum "John Creech," 1 qrt
100 Sedum spurium "Dragon's Blood," 1 qrt
32 Rubus calcynoides, 3qrt
The sedums were planted in swathes for contrasting colour and bloom-times, and the creeping raspberry along the path, for easy picking. Delivery of materials (including those for the rest of the garden) took a day by crane, and actual installation of the greenroof took one day, by a crew of three in 95 degree F. The difference in temperature on the roof once it was installed seemed instant! Butterflies and bees arrived as we left.
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|Learn more about the garden designer, Holly, Wood and Vine, LTD by visiting their website.|
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