在巴黎，土地的稀缺性部分地解释了该城市的低住房生产能力。必须鼓励对密集化的替代方案的研究。Rotunno Justman建筑公司刚刚在第15区提出了一个小建筑。通过建筑干预的准确性，该项目重新美化了现有建筑，并与该区的天际线相联系，为该区的和谐密集化做出了贡献。

In Paris, the scarcity of land partly explains the city’s low housing production capacity. The research for alternatives to densification must be encouraged. The Rotunno Justman architectural firm has just raised a small building in the 15th arrondissement. Through the accuracy of the architectural intervention, the project requalifies the existing building and contributes to harmonious densification of the district, in connection with its skyline.

该机构在2017年被问及位于rue de l’Harmonie的一栋两层楼的提升可能性。该项目位于两栋五层和六层的社会住房之间。该建筑建于19世纪末，现有建筑在1997年进行了重组，结构状况良好。由于行政和技术上的可行性，建筑师为客户提供了一个由两层组成的立面（每层约60平方米），每层有一个住宿。4楼的住宿有露台和一个带绿色山丘的屋顶，3楼有一个种植阳台。

The agency was questioned in 2017 on the possibility of raising a two-storey building located in rue de l’Harmonie. The project is located between two social housing buildings of five and six floors. Built at the end of the 19th century, the existing building was restructured in 1997 with is in good structural condition. The administrative and technical feasibility leads the architects to offer their client an elevation made up of two levels (each of around 60m2) with one accommodation per level. The accommodation on the 4th floor has terraces and a roof with a green hill and the 3rd floor has a planted balcony.

建筑干预是根据几个目标进行的：建立光和耐久性，以有限的成本开展工作，并确保与城市景观的良好融合。场地的组织使得下面三层的住户可以留在原地。工作于2020年5月开始，在第一个围挡结束后于2021年2月完成。

The architectural intervention was carried out in accordance with several objectives: to build light and durability, to carry out the work at a constrained cost, and to ensure a good integration into the urban landscape. The organization of the site made it possible to keep the occupants of the three lower levels in place. Work began in May 2020 at the end of the first containment was completed in February 2021.

对于rotunno justman建筑师来说，”一个项目除了自身的限制外，还必须有助于城市的再生。这个扩建项目本身并不是作为一个建筑对象，而是作为一个城市密度的元素，正确地添加到城市结构的背景中”。

For the rotunno justman architects, “a project in addition to its own constraints must help regenerate the city. This extension was conceived not as an architectural object in itself but as an element of urban density adding rightly to the contextual urban fabric”.

通过其体积，该立面与建筑的低层顺利地协调起来。它点缀了现有的建筑，并加强了演变中的永久性理念。在街道上，3楼的退缩突出了滑动阳台，它与4楼重新诠释了巴黎的屋顶和它的桥。在玻璃幕墙上，穿孔和带肋钢板的双层皮肤被打断到三个窗框的右侧，以现代方式唤起天窗的主题。这种微妙的双层皮肤，光线和褶皱的面纱，根据时间和时刻的不同而变化。这个时尚的装置既能过滤光线又能过滤视线。

By its volume, the elevation harmonizes smoothly with the lower levels of the building. It embellishes the existing and reinforces the idea of permanence in evolution. Highlighted on the street front by the retreat of the 3rd floor into which sliding balcony slips, it reinterprets with the 4th floor, the Parisian roof, and its brisis. Coming to dress the glass facades, a double skin of perforated and ribbed sheet steel is interrupted to the right of the frames of three bays to evoke in a contemporary way, the theme of the skylight. The perception of this subtle double skin, light and pleated veil, varies according to the time, the moment. This stylish device filters both light and sights.

穿孔和带肋钢板的双层皮肤与三层框架安装在一起。它是用来装扮玻璃外墙的。天窗的主题以一种现代的方式被唤起。对这个微妙的双层皮肤的感知，就像一个轻盈的褶皱面纱，随着时间和时刻的不同而变化。这个时尚的装置既能过滤光线又能过滤视线。在建设层面上，rotunnojustman机构研究并实施了低碳解决方案，主要使用可再生（木结构和木棉绝缘）或可回收（钢）材料，同时实施节能解决方案。

A double skin of perforated and ribbed sheet steel is installed in line with the three-bay frames. It comes to dress the glass facades. The theme of the skylight is evoked in a contemporary way. The perception of this subtle double skin like a light and pleated veil varies according to the time, the moment. This stylish device filters both light and sights. On the constructive level the rotunnojustman agency has researched and implemented low carbon solutions by using primarily renewable (wood structure and wood wool insulation) or recyclable (steel) materials while implementing energy-efficient solutions.

Architects: rotunnojustman
Area: 122 m²
Year: 2021
Photographs: Herve Abbadie
Manufacturers: Fermacell
Structural Engineering: Metz Ingénierie
Kitchen Designer:Antoine Chauvin
Program :logements
Client:SCI DE L’HARMONIE
City:Paris
Country:France