Solar heating has existed in architecture since ancient times, when people used adobe and stone walls to trap heat during the day and slowly release it at night. In its modern form, however, solar heating first developed in the 1920s, when European architects began experimenting with passive solar methods in mass housing. In Germany, Otto Haesler, Walter Gropius, and others designed schematic Zeilenbau flats that optimized sunlight, and following the import of “heliotropic housing” to the U.S., wartime fuel shortages during World War II quickly popularized passive solar heating. Variations of this system then proliferated around the world, but it was not until 1967 that the first Trombe wall was implemented by architect Jacques Michel in Odeillo, France. Named after engineer Felix Trombe, the system combines glass and a dark, heat-absorbing material to conduct heat slowly into the house.

The key to successfully designing or recovering public spaces is to achieve a series of ingredients that enhance their use as meeting places. Regardless of their scale, some important tips are designing for people's needs, the human scale, a mix of uses, multifunctionality and flexibility, comfort and safety, and integration to the urban fabric.

To give you some ideas on how to design urban furniture, bus stops, lookouts, bridges, playgrounds, squares, sports spaces, small parks, and urban parks, check out these 100 notable public spaces.

As every professional in the building industry knows, construction can be a costly and endlessly time-consuming endeavor. Delays are almost more frequent than on-time construction, and can be induced by extensive bureaucratic requirements, weather and other unexpected circumstances, inadequate planning, too few personnel, or a whole host of other causes. Lengthy construction projects can also negatively impact public perception of a project even before it has been built, especially if the projects experience delays or inconvenience those who live or work close to the building site. Moreover, some projects simply need to be built along a faster timeline than is typically feasible for a traditional construction project. Thankfully, there exists a solution for those seeking to drastically reduce construction times: modular construction.

Choice of building materials and the inherent continuous reflection about the reach and capabilities of architecture are an interesting alternative way to approach this issue. The materials used in social housing should address local and economic possibilities and the real needs for access to housing in the contemporary context.

In this article, we analyze different projects published on our site to identify some of the predominant materials used in social housing, both for the formation of structures or enclosures. The intentions of this are two-fold: firstly, to create a worldwide panorama of different case studies with different construction styles from a range of geographical locations, and secondly, to provide inspiration and tools to architects to make better social housing.

Below we present 15 social housing projects and their diverse materials and construction styles.