As more people turn to roof gardens to grow their own food, they come with all sorts of ways to keep these pieces of light, and prevent the collapse of the roof collapses.
"Weight is very important," said Josephine Quiocho, an organizer of the project to graze the ceiling, a community garden that grows mustard, spinach, cabbage, peas and other crops on the roof Glide Memorial 's.
Graze the roof has perfected an ultra-light "land" includes coconut and perlite heart, a volcanic mineral that is transmitted plants. "The essence of coconut allows more air into the ground, she clarifies and helps retain moisture. We do not need heavy water clogged soil that may weigh on the roof," said Quiocho.
Glide Memorial farmers to cultivate their crops in bread boxes and boxes of wine, partly because the light boxes, partly to show the faithful that they can grow plants in containers are in the house.
In New York, Lize Mogel adopted a structural approach: She had five steel beams built into your home so you can start planting a truss. Mogel, an artist who grew crops roof for years, always dreamed of having a full plate.
"I had to do renovations in any case, I spoke with the architect and t much to reinforce the roof of the cost Do not, '" he said. "Because the steel beams can be connected directly to the gateway where I grow plants, networks may have a heavy burden greatly. Elephants could get up there if you want."
For the urban farmers of the lower roof, shave every pound of extra weight is a hobby in itself.
Jay Arena, coordinator of the farm on the roof of Philadelphia, is working with "farmers who want to be architects and architects who want to farm" to transform the skyline of the city. After many hours of study, the sand and his group focused on the expansion of cooperative activities in the famous row houses in Philadelphia.
"We decided not to press on the roof acts like a brick wall is shared between two houses. For the next season, which will focus on two town houses of brick walls between the houses. They are absolutely perfect, because it may contain a lot of support, "said Arena, a music teacher.
His group is now talking about block captains and residents groups to involve more people this year.
"I use a wooden platform to grow my crops clean clear," said Arena. "If we expand the project, we would like to spread the load between the roofs of the people."
In Chicago, Heidi Hough, who co-writes a blog for farmers in the roof called greenroofgrowers.blogspot.com has transformed his passion for urban agriculture in search of a light roof garden perfect.
Above it, grow plants on wooden platforms, which helps reduce pressure on the roof. A local factory plastic pickle barrels of hot dogs also gives it "recycles and upcycles" for vegetable growers. Hough and some friends have developed an irrigation system that requires little land and water, reducing the weight of the farm.
Roof, because farmers use water only what they need, they have to be careful evaporation.
Hough used a plastic liner in the peat to stop evaporation, while Johanne Daoust, a farmer from the roof of Toronto, use "shade cloth" that she saw for sale during a trip to China. The fabrics block the sun while allowing the free flow of air by plants.