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Manhattan Rooftop Becomes an Outdoor Living Oasis
When you think of landscape construction, you normally associate it with earth, and dirt. You envision the ground as the foundation for the project and you build up and out from there. But what happens when the client wants their outdoor living space on a rooftop six stories above one of the busiest cities in the world.
Manhattan, N.Y.-based KokoBo Plantscapes was asked to do just that when their client asked them to turn a blank and vacant Manhattan roof top into a space where they could use it year round to relax, and entertain. KokoBo worked with the homeowner to add another design objective: to create a safe ?EUR??,,????'?????<?greener?EUR??,,????'?????<? space, where the clients could feel a separation from the fast and noisy surrounding city. Kelly Homan, senior designer for KokoBo, led the transformative project that took 18 months from initial design consultation to completion.
?EUR??,,????'?????<?Our main goal was to transform 1,000 square feet of gray, barren and cold roofscape into something that was green, lush and warm, and included the views of Manhattan?EUR??,,????'?????<???EUR?s spectacular skyline,?EUR??,,????'?????<? Homan said.
She says designing an outdoor kitchen/living space on a rooftop is dramatically different from creating one in a yard.
?EUR??,,????'?????<?Weight and space restrictions are the main two differences. When you are dealing with a roof or terrace, certain load weights have to maintained,?EUR??,,????'?????<? Homan said.
In addition, she said engineers have to approve the weight limits for the roof. Another difference comes in the allotted square footage for an outdoor kitchen. It is typically smaller than a suburban yard. However, the clients usually want the same items, so designers have to be especially creative with its placement.
Even though this location is dramatically different from what most contractors are used to, one element remains the same: the inspiration for the design. Homan says she got her design cues from the interior of the house and the homeowners?EUR??,,????'?????<???EUR? desire to use eco-friendly and sustainable products.
While all landscape projects have obstacles to overcome, the challenges on this job were unique, ranging from moving materials to a space six stories above street level to ensuring all parts of the new space could be supported by the roof. ?EUR??,,????'?????<?Our roof access was limited. We had to use scaffolding with a 1,200 pound hoist for the first half of the job,?EUR??,,????'?????<? Homan said.
The KokoBo team had only a small window of time to use the scaffolding, which meant they had to prioritize which materials would arrive at the job site first.
In addition to location, an even bigger obstacle was standing in the way of the getting the job done: the roof itself. It had to support a variety of spaces that weighed differently on its structure. The outdoor kitchen was one weight while the pergolas, water feature and sitting areas sat less heavily on the roof.
?EUR??,,????'?????<?We added some substructure to the kitchen to distribute the weight out evenly. We also incorporated ?EUR??,,????'?????<???EUR?I?EUR??,,????'?????<???EUR? beams under the water feature,?EUR??,,????'?????<? says Homan. ?EUR??,,????'?????<?The wall for the greenwall was reinforced with extra vertical support behind the bricks.?EUR??,,????'?????<?
Once the weight loads were appropriately set, the building process began. With no ground to dig into, KokoBo?EUR??,,????'?????<???EUR?s team relied on an elevator pedestal system from Hanover Architectural Products that is designed for roof tops.
Essentially, they are pedestals that have the ability to raise the flooring material several inches above the roof. Each unit?EUR??,,????'?????<???EUR?s height can be adjusted to accommodate fluctuations in the roof, ensuring a level floor. Between the supporting columns and under the subfloor is where the team concealed all of the utilities needed to power the kitchen, lighting and water feature. Once the pedestals and utilities were placed, the granite and wood flooring were placed on top of the pedestals.
Russ Faulk, a recognized expert in outdoor kitchen design and vice president of product development for Kalamazoo Outdoor Gourmet, said one of the main areas where an outdoor kitchen installation can go wrong is how the utilities are run.
Faulk said two of the biggest mistakes are the GFI outlets and the diameter of the natural gas pipe serving the outdoor kitchen. According to Faulk, when running the electrical it should be tied to one or two GFI breakers in the home?EUR??,,????'?????<???EUR?s main electric panel rather than individual GFI outlets. If an undercounter refrigerator trips a circuit, it is easy get it working again when you simply reset it at the panel versus wrestling the refrigerator out to reset the outlet.
Faulk says the second main utility concern is ensuring the appliances in the kitchen receive the gas pressure they need to operate efficiently.
?EUR??,,????'?????<?This isn?EUR??,,????'?????<???EUR?t just about the grill; it?EUR??,,????'?????<???EUR?s about all the appliances feeding off the gas supply. When determining the diameter of the gas line needed, you have to take into account the total BTUs of all appliances as well as the length of the gas line. If you don?EUR??,,????'?????<???EUR?t get the diameter right, your grill won?EUR??,,????'?????<???EUR?t get as hot as it should and your space heaters won?EUR??,,????'?????<???EUR?t throw off the right amount of heat,?EUR??,,????'?????<? he said.
The last obstacle that needed to be overcome was one of the main features of the roofscape: a large blank brick wall. Homan says the space was lacking a focal point until she disguised the brick with a green wall system. She used 49 19-inch by 19-inch panels that were connected to the brick with mounting strips that were affixed to the brick. Each panel was filled with different types of hardy sedum, ensuring no replanting in spring and keeping with the sustainable theme of the entire design. She says the irrigation system is part of the green wall, with drip tubing and emitters that run through the top of each row of panels. Gravity carries water from the top to each panel, all the way to the bottom.
?EUR??,,????'?????<?Below the green wall is a custom-made planter which the excess water runs into to water the plants in it. What is not absorbed by all the plants then runs into the roof drains, just as rain water would,?EUR??,,????'?????<? Homan said.
The materials chosen for the project had to endure Manhattan?EUR??,,????'?????<???EUR?s seasons, complement the design cues of the home?EUR??,,????'?????<???EUR?s interior and be eco-friendly. The flooring consists of granite tile and Ipe wood square tiles. The kitchen counters are made of ice stone, a substitute for granite, which is made with 100%, recycled glass and cement, and 100% sustainable. The outdoor kitchen equipment is made of 304-grade stainless steel, while the pergolas were built with cedar. Continuing with the eco-friendly theme, Homan incorporated FX Luminaire lighting, a low voltage system, to provide ambient and task lighting in the sitting and kitchen areas.
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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