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Façade

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A façade is the exterior face or front part of a building.

Basilica di San Pietro in Vaticano September 2015-1a
Basilica di San Pietro in Vaticano September 2015-1a

The term is a loanword from the French word for frontage or face. It traces back to the Italian word "faccia," which means face. This word originally comes from post-classical Latin. In the world of architecture, the façade is a vital design element. It establishes the visual tone for the entire structure. From an engineering perspective, the façade also impacts energy efficiency. Outside of building design, the word can describe a deceptive outward appearance. This describes when something looks one way but is actually different.

Architects often use façades to update the appearance of older structures. During the Georgian period, many English townhouses received fashionable new fronts.

Germaine Tillion, Geneviève de Gaulle-Anthonioz, Pierre Brossolette et Jean Zay rentrent au Panthéon 09
Germaine Tillion, Geneviève de Gaulle-Anthonioz, Pierre Brossolette et Jean Zay rentrent au Panthéon 09

For example, a building in Bath called The Bunch of Grapes appears to be Georgian. However, its appearance is only skin deep. Some interior rooms still contain older Jacobean plasterwork ceilings. Similar methods appear in Santiago de Compostela. The Casa do Cabido is a building three metres deep. It was constructed specifically to match the architectural order of the square. The Santiago de Compostela Cathedral features a large Churrigueresque façade. This massive front actually encases and conceals the older Portico of Glory.

Modern high-rise construction utilizes specialized façade systems. In these tall buildings, exterior walls are often suspended from concrete floor slabs.

Basilica di San Pietro in Vaticano September 2015-1a
Basilica di San Pietro in Vaticano September 2015-1a

One common type is the curtain wall. Another type is the precast concrete wall. These systems are typically made from aluminum or stainless steel. Aluminum may be powder coated or anodized for specific finishes. Some designers use more lavish materials like titanium. However, titanium is not very popular. It is very expensive to use. It also has a susceptibility to staining at the panel edges.

Fire safety is a critical consideration in façade engineering. Some façades require a specific fire-resistance rating. This is necessary if two buildings are positioned very close together. A rated façade helps lower the likelihood of fire spreading between structures. Engineers must consider the melting point of materials during a fire. For instance, aluminum typically reaches its melting point within minutes of a fire starting. Building codes may also limit the percentage of window area allowed in exterior walls. If a wall is not rated, the junction where it meets a rated slab becomes a point of concern. To maintain safety, builders may choose rated windows and fire doors.

New materials have changed how fire behaves in high-rise buildings. The extended use of polymers has led to changes in safety data. These polymers are more flammable than traditional building materials. This has resulted in an increase of high-rise building façade fires in recent years. To help manage these risks, engineers use fire stops for building joints. Additionally, installing fire sprinkler systems on each floor has a profoundly positive effect. These systems help protect buildings that utilize curtain walls from spreading flames.

Not all façades are intended to be permanent or functional buildings. Film sets and theme parks use façades for different purposes.

Germaine Tillion, Geneviève de Gaulle-Anthonioz, Pierre Brossolette et Jean Zay rentrent au Panthéon 09
Germaine Tillion, Geneviève de Gaulle-Anthonioz, Pierre Brossolette et Jean Zay rentrent au Panthéon 09

On a film set, these structures are much cheaper than real buildings. They are not subject to standard building codes within the set. These fronts are simply held up by supports from behind. Sometimes, they include boxes for actors to step in and out of. In theme parks, façades serve as decoration. They typically hide a simple building design that houses an interior ride or attraction.

Understanding the façade requires looking at both art and science. It connects the history of local architecture to modern engineering. Many historical façades are protected by local zoning regulations. These laws can restrict or even forbid any alterations to the exterior. This ensures that the history of a city remains visible. Whether it is a massive cathedral or a movie set, the façade defines how we perceive a space. It acts as the interface between the internal world of a building and the external world of the observer.

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