Bob Dylan's “Knockin' on Heaven's Door” is about arriving to heaven, but it also speaks of the element of the door, which allows one to enter paradise (or not). There is a lot of symbolism related to this constructive component, such as opening, limits, transitions and transformations. Doors have been around since the time of the Egyptian tombs and we can hardly think of architecture without them. While doors play a prominent role and have an unquestionable function, they can also be seen as visual obstructions in certain interior projects, which can be at odds in some spaces, without really fitting in aesthetically.

Wooden elements have the power to add warmth to a space or building. Through their shades, textures and rustic look, wooden surfaces tend to stand out, especially when used alongside more neutral and sober materials. In the Aldapeta María Ikastetxea School, a project developed by IDOM in the city of San Sebastian, Spain, the architects used the material in a particularly interesting way. Wood panels brought visual comfort and warmth to the building, whose material palette is limited, focusing especially on the use of glass, steel and exposed concrete.

The relationship between architecture and nature is complex. If, on the one hand, we enjoy framing nature as art in our homes; on the other hand, we try at all costs to avoid the presence of obstructive "real" nature in our walls and structures, which can be damaged by roots and leaves. At the same time, we use green roofs, vertical gardens and flower boxes to bring cities closer to nature and improve people's wellbeing; but we also construct buildings with materials that are completely dissociated from fauna and flora. Although the advancement of biomaterials and new technologies is gradually changing this, we should nevertheless ask ourselves whether the structures and buildings we occupy need to be separated from the nature that surrounds them. This was the question that led researchers at the University of Virginia (UVA) to develop geometrically complex 3D-printed soil structures on which plants could grow freely.

Interior courtyards can be found in various types of traditional architectures around the world, especially in warmer climates. They can be classified as introverted, safe, and even sacred spaces in some cultures. They can also be gathering places and, above all, provide greater contact with nature while providing light and ventilation to home interiors. To properly design these spaces and create a functional relationship between the inside of a house and its courtyard, it is important to use appropriate doors and openings. In this article we highlight 5 projects that use sliding glass doors for the seamless integration of both spaces.

There is an unusual story involving railings during World War II. To meet the demand for ammunition, ships and vehicles for battle, various fences and railings in the city of London were removed for repurposing. The real fate of these pieces, however, is unclear: some say they ended up being dumped into the Thames river or became ballasts for ships, as they couldn't be recycled. The reason was that they were all made of cast iron at the time, making them difficult to reuse; unlike the large amount of materials and designs available today. Their functions, however, have not changed: railings provide protection to occupants and can be prominent elements in architecture. In this article, we explain how to specify and design different types of railings, according to the different materials available.

“Counting sheep” is a well-known mental exercise that people use when trying to fall asleep. It is thought to have been popularized by Miguel de Cervantes in Don Quixote, who is said to have been inspired by a twelfth-century Spanish tale. Whatever its origin, it is curious to think that falling asleep has been a problem for so long, even long before the invention of electric light or social networks on smartphones. In the early 2000s, the University of Oxford developed a study to prove the effectiveness of this sheep-related method. The conclusion: this tactic does not work.

Something that is scientifically proven, however, is the relationship between the body's production of melatonin and the feeling of sleepiness at the end of the day, which can in turn lead to a restorative night of sleep. This is directly related to the circadian rhythm, our daily biological clock. This inner "clock" synchronizes our body's functioning and is highly influenced by the wavelengths and intensities of natural and electric light we are exposed to during the day. As we continue to spend more and more time indoors, typically with inadequate visual stimuli from electric lighting during the day, and too much stimulation from electronic devices and overhead lighting after dark - it is essential to focus on the study of lighting in architecture and how it affects people and their well-being.

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Eucalyptus forests in Australia are known to burn periodically. It is the trees' way of ensuring propagation, as its fruits – known as gumnuts – have an insulating layer breaks down with the heat of the fire. Once they open, the burnt soil is covered with seeds, initiating a process of forest renewal. Glenn Murcutt, an Australian architect, has created a body of work rooted in the country's landscape. His innovative houses embrace the possibility of frequent fires, including elements that allow for fire control with the least possible loss. In short, the houses are built with very non-flammable materials, always have huge water reservoirs, and a “flood system” that allows the building and its immediate surroundings to be spared in the case of a forest fire.

Concrete can be found in almost any type of construction around the world. But how is it made? 

During manufacturing, once in contact with water, concrete’s main ingredient, cement, binds to any aggregates present and goes through a number of complex chemical reactions. That eventually turns it into concrete, a material that is very durable and easy to work with. Despite this reliable durability, concrete can go through a number of internal processes that can lead to serious structural concerns. One of these is alkali-silica reaction (ASR), which can cause cracks in concrete and even put structures in danger of collapse over time.

The primary function of architecture, and possibly the most important and basic, is to protect against the weather. Whereas our ancestors would stack tree trunks and animal skins to create rudimentary shelters against the sun and rain, the emergence of architecture took on impressive proportions, creating temples and captivating spaces that fulfill many other functions. The purpose of sheltering people from the outdoors, however, remains an important one and can turn an outdoor area into a functional and engaging space. With all the innovations that currently exist, there are also numerous improvements emerging for their mechanisms and functions.

The 17th edition of the "Architecture Student Contest" has come to an end, with the participation of over 220 universities from 32 countries. This year, the challenge was to transform a district located in Warsaw, Poland in order to revitalize an area located next to Warszawa Wschodnia (Warsaw East). The contest involved the design of a new student residence and housing, as well as a meeting and entertainment center in an old factory building that is classified as a historical heritage site. With the requirement of addressing the space's performance as well as its architectural, environmental and social aspects, the contestants were tasked with a project that positively impacts its users and the planet, with low carbon emissions throughout its life cycle.

Food pyramids are familiar to all of us. They are visual guides that show us the proportions of foods that we should supposedly eat on a daily basis, in order to stay healthy. Composed of a series of layers with different food types–such as grains, flour, fats, vegetables, and others–, at the base are the foods that should be consumed in larger quantities. Towards the top, each layer becomes successively smaller, indicating the foods that are meant to be ingested rarely. The pyramid can vary according to countries and cultures, but its main purpose is always to provide a guide for a balanced life. There are no prohibitions, but it does indicate some foods that should be consumed with caution because of their impacts on our health.

If we are what we eat, is it possible to also replicate this in the construction industry and our buildings? Using this same easy to understand visual language, the Royal Danish Academy Center for Industrialized Architecture (Cinark) developed the Construction Material Pyramid. The idea was to highlight the environmental impact of the most used construction materials, focusing on the analysis of the first three life phases: extraction of raw materials, transportation and manufacturing.

Façades don't always have to be opaque. Whereas in the past the only options were heavy and raw–such as stone and brick–in recent years façades have adopted an increasingly lighter appearance, with innovative materials becoming the protagonists. These give the building a different look, delicate and transparent, while still maintaining privacy and thermal comfort. Examples of these include polycarbonate, translucent sheets, perforated tiles, glass and even metal chain links, which was the chosen material for a building in Montpellier, France.

The terms critical regionalism, popularized by theorist Kenneth Frampton, proposed an architecture that embraced global influences, albeit firmly rooted in its context. That is, an approach defined by climate, topography and tectonics as a form of resistance to the placidity of modern architecture and the ornamentation of postmodernism. Bringing familiar elements to a particular location can allow the building to be better accepted and incorporated into the local context. This was the case of the New Maitland Hospital, which incorporated a large brick panel next to the main façade, as a reference to the community's traditional symbols.

In the face of increasingly alarming predictions regarding the climate crisis, just increasing the efficiency of buildings is no longer enough. Zero energy buildings - or, better yet, energy positive buildings - make it possible to mitigate the negative impacts of the construction industry, which is responsible for 40% of all greenhouse gas emissions. These are buildings capable of producing more energy than they consume through the use of renewable sources. To reach this ambitious goal, it is necessary to follow three main steps:

1. Install a renewable power system to provide clean energy;

2. Include high efficiency systems, such as climatization equipment and low energy lighting.

3. Improve the construction envelope to conserve energy and reduce loads.