Dezeen's Jessica Mairs shares a recent initiative from Argentinian studio Adamo-Faiden to make better use of vacant city rooftops by building greenhouse like enclosures over early 20th-century residences in Buenos Aires.

The studio's founders, Marcelo Faiden and Sebastian Adamo, develop glass and metal extensions that fit a home's stepped roof, creating valuable space that residents may use as a winter garden, workspace, playroom, or gathering venue.

"Trying to understand the urban fabric as an artificial ground is one of them. Instead of yearning an empty flat plot, we took every 'accident' from the existing roof as an opportunity to develop a specific environment for the extension," said Faiden. Blas House's lightweight metal frame, mesh and glass construction was designed to help quicken construction time – an important factor as the clients remained in the existing house throughout the project. The combination of opaque, transparent and permeable components expose the area to the elements in varying degrees. There is also a separate entrance, so it can accessed directly from the street.

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