![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-26.jpg)
Shadow Surface by Ateliermob
Portuguese architects Ateliermob have completed a cafeteria and shelter with circular holes cut into the roof at Sacavem, near Lisbon in Portugal.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-03.jpg)
Called Shadow Surface, the structure consists of a large concrete roof supported by three walls, providing a sheltered space for the residents to meet and sit in the shared courtyard.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-04.jpg)
The concrete slab, which was cast in-situ, is randomly punctured with holes to allow sunlight and rain through.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-24.jpg)
The single-storey cafeteria is positioned between this structure and a children's playground; full-height windows overlook the playground.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-20.jpg)
A lift and staircase at one end of the shelter lead to underground parking.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-22.jpg)
The project aims to unite the surrounding residential blocks.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-10.jpg)
Photographs are by João Morgado.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-11.jpg)
Photographs are copyright Joao Morgado and used with permission. See our copyright policy.
Here's some text from the architects:
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The cafeteria and shadow surface project at Sacavem - in the periphery of Lisbon, is finished.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-17.jpg)
These works are very special to ateliermob, since it represents our first public work.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-21.jpg)
Integrated in the renovation of Av. do Estado da Índia (main traffic axes of Sacavém), we were called to design two different constructions in between buildings.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-09.jpg)
The cafeteria closes the children public playground and links different axes of circulation.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-07.jpg)
The shadow surface plotted on the top of the public square and over the parking, tries to thread and gather all the different content and functionalities of the square.
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-08.jpg)
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-23.jpg)
![](https://static.dezeen.com/uploads/2009/11/dzn_Ateliermob-13.jpg)