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Materials & structure·applied

Green & Usable Roofs

Why it matters

A conventional roof is a building's laziest surface: it sheds rain it could harvest, absorbs sun it could convert, seals ground it displaced, and offers its best views to nobody. Making the roof work — as terrace, catchment, generator, garden, habitat — recovers the entire footprint the building took from the land and gives it back multiplied. A green roof returns living surface to the site's ecology: it insulates, and it outlives bare membranes. A usable terrace adds the most atmospheric square metres a home can own. There is a cultural fight in this sense too, and we know it firsthand. In Ukraine the reflex says "we have winters, why bother". The lived answer from our own roof is simple: an exploited roof changes how a house feels to inhabit, in every season the roof is usable.

Role in 001's holistic picture

The roof is where four chains of the catalog physically converge: the water chain begins on it, the energy chain mounts on it, the landscape can continue over it, and the footprint ethics are repaid by it. Multi-level ensembles of usable roofs and connecting bridges are a signature move of 001's design language — buildings composed as walkable landscapes. A planted roof also works as passive cooling and lifts the felt half of indoor quality.

In the world

Whatever job a working roof does — terrace, catchment, generator, garden — it comes down to the same handful of layers. The green-roof version has gone from niche to national habit: waterproofing detailed for decades, drainage, substrate, and plant communities chosen for the exposure. Germany leads the world at it: it holds the greatest share of green roofs in Europe. The industry association BuGG estimates the national stock at roughly 120 million m². The pace is still rising: about 10.2 million m² of roofs were newly greened in 2023 alone, roughly one in six of the country's new flat roofs. Municipal grants and stormwater fees push it along. And the sense scales all the way down to structures everyone owns. Green Roof Shelters is the UK team around green-roof veterans John Little and Dusty Gedge. It has spent over a decade putting deep-substrate meadow roofs on bin stores and bike sheds. Mixes of forty-plus drought-tolerant species flower where flat bitumen used to be. The fifth facade starts at the scale of a shed, not a skyline.

And at the other end of the scale, the fifth facade grows actual food. The Thammasat University Rooftop Farm in Bangkok is Asia's largest urban rooftop farm. It steps 22,000 m² of roof into cascading rice terraces modeled on the traditional hillside kind. There are 7,000 m² of organic farmland where rice and vegetables grow, retention ponds holding over 11,000 m³ of monsoon rain, solar panels pumping the irrigation, and public space folded straight into the terraces. One roof stacks green, public, food, water, and energy functions at once. And in New York, Brooklyn Grange has run the world's largest rooftop soil farms as a business since 2010: almost five acres across city roofs, over 80,000 pounds of organically grown vegetables a year. A roof that feeds people is not a render. It is a fifteen-year-old business model and a university campus.

How 001 engages with it

House 001 lives its roof. The exploited rooftop terrace with its tilted solar array is part of daily life, and the terrace surfaces feed the rainwater system. Our testimony against the "we have winters" skepticism is simply years of using it. Unity Hub keeps a green roof in its accepted concept — living surface returned at community-building scale. And the Hlibivka design composed whole ensembles around this sense: multi-level modules linked by bridges and walkable roofs, where the roofscape is the architecture. Catchment and generation are layered onto the same surfaces.

Maturity: applied. Lived daily at House 001 (terrace, catchment, generation); green roof held in the Unity Hub concept; ensembles designed at Hlibivka.

Further reading