The foregoing section on aesthetic components stressed the fact that, in design, the whole or total effect is more important than the specific device or element used. The same is true of architectural components, and this should be kept in mind in the following discussion.

Ceilings

Although ceilings are in most interiors the largest unbroken surface, they are often ignored by amateur designers and even by professional designers. The result, especially in public and office interiors, is frequently a mass of unrelated lighting devices, air conditioning outlets, and the like. Ceilings were emphasized in the Baroque and 18th-century traditions: beautiful interiors of these periods had highly ornate, decorated ceilings, with painted surfaces or with intricate plaster details and traceries.

Few modern designers take advantage of the design possibilities offered by ceilings. One such possibility is the creation of textural effects with wood. Of course, one must respect the effect of a simple plaster ceiling in an otherwise well-designed interior; often the white plaster ceiling is needed to reflect light and to provide a calm cohesiveness to the space. Since most modern ceilings are low, a heavy texture or a strong colour could create a depressing feeling; hence, the popularity of a plain white ceiling. It is important for a plain ceiling to be just that: a surface without blemishes, without bumps, and without small unrelated areas of different height.

In contemporary public buildings there is frequently a “hung” ceiling below interior concrete structural slabs. The space between the slab and the “hung” ceiling is needed for mechanical equipment as well as to allow for the recessing of the lighting system.

An earlier section of this article discussed the variation of heights in relation to scale and space. It is important to keep such varying ceiling heights related to the plan of the room if such a device is to succeed. A lowered ceiling in a dining area, for instance, can be pleasant and intimate, but a lowered ceiling covering only part of the area can be most distracting.

Floors

Basically, there are two kinds of floors for interiors: those that are an integral part of the structure and those that are applied after the structure is completed. Interior designers working together with architects have the opportunity to specify flooring such as slate, terrazzo, stone, brick, concrete, or wood, but in most interiors the flooring is designed at a later stage and is often changed in the course of a building’s life. Sometimes it is possible to introduce a heavy floor, such as terrazzo or stone, in a finished building or during remodeling, but these materials, beautiful as they are, tend to be too costly as surface applications.

Man-made, or synthetic, floor coverings are usually classified as resilient floors. The oldest of this type is linoleum. The resilient flooring materials marketed in the late 20th century include asphalt, vinyl asbestos, linoleum, cork, and vinyl. Cork, which is not a synthetic, is handsome, but is difficult to maintain and is not exceptionally durable. Basically, other resilient floor tiles are excellent flooring materials that are both economical and easily maintained. They can be given almost any appearance, which is a temptation that manufacturers are unable to resist. When the tiles are plain, in good colours or textures, they are very attractive and appropriate, but often they are made to imitate stone, brick, mosaic, or other materials, and the results are generally of a less satisfactory nature. Pure vinyls are the most expensive of the resilient floorings and have been the most tortured in terms of “design.” The vinyls are the softest and most resilient of the tiles and are very easy to maintain. Asphalt tile is the least expensive and consequently the most widely used resilient flooring, although it is quite brittle and hard underfoot. Vinyl asbestos is somewhat softer underfoot and, being grease resistant, is easier to maintain than asphalt, but its cost is generally higher. Linoleum, which ranges in cost between the asphalt and pure vinyl floorings, is strong and suitable for heavy-duty uses.

Ceramic tiles and quarry (unglazed) tiles are made not only for such areas as bathrooms but, particularly in the case of quarry tiles, are suitable for almost any space. Installation usually requires a cement bed over the existing subfloor, making this material difficult to use in existing buildings. Like other natural materials, quarry-tile floors possess a natural beauty and have the additional advantage of easy maintenance.

Wood floors still account for a very large percentage of all floors, especially in residences. In addition to the strip oak floors, the standard for many apartment houses or homes, many beautiful prefabricated parquet patterns are available in a variety of woods and in many shapes and sizes. These wood tiles can be installed, just like the resilient floor tiles, over existing floors. Wood floors have great warmth and beauty but have the disadvantage of needing more care than do some of the synthetic tiles or quarry tiles.

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Walls

Every wall is a material in itself; and ideally no material, if it is properly used, needs to be covered up. Some elegant buildings constructed since 1960 have used concrete in its natural texture—i.e., showing the formwork left by wooden forms as a conscious expression of the material. During the 19th century, fakery in design was very popular, and part of the concern with the true expression of materials today is a revolt against the earlier tradition. In the 20th century, for instance, interior brick walls are considered very beautiful and desirable, yet many old townhouses have layers of plaster and paint or wallpaper on top of attractive brickwork.

It is not unusual for a decorative detail or device to survive long after the valid reason for it has disappeared. Wall panelling has been popular for hundreds of years, and, indeed, a natural wood texture adds warmth and elegance. The only way the craftsmen of earlier periods were able to apply wood panelling was in frames (stiles and rails) or wainscotting, since wood panelling was made of solid wood and had to be broken up into narrow dimensions in order to prevent warping and shrinking. Out of that need developed beautiful details of moldings, carved details, and carefully proportioned panelling. A similar art developed somewhat later in plaster. Obviously, 20th-century building costs and methods rarely permit real quality in elaborate panelling or highly ornate plasterwork, nor would this sort of imitative design be appropriate in a modern building. But wood panelling and plywoods in many beautiful veneers are readily available and provide a vast range of beautiful, if expensive, wall surfacing for important spaces. Prescored, pre-finished inexpensive plywoods, on the other hand, are often used as finishing materials for basement, recreation, or utility rooms in many homes in the United States.

The use of fake moldings, with printed moldings or panelling or with any of the countless imitation wall-surfacing materials from brick wallpaper to artistically poor wall murals, is the kind of decoration that a good designer avoids. Even so, not every interior should be a plain space with nothing but the natural walls. Highly decorative wallpapers have long been available in bold and exciting patterns. Often in 20th-century design a strong paper is employed on one wall only, instead of having the whole space surrounded by a dominant pattern. Many wallpapers, such as grasscloth and shiki silk papers from the Far East, have natural textures. For public spaces and for any space requiring easy maintenance and special cleanliness, a number of wallpapers have been developed that are completely washable and sanitary. Most of these are vinyl-coated fabrics, and some of them are extremely strong and durable and are particularly suited for such spaces as hospital or hotel corridors. Because these vinyl-coated wall fabrics are usually specified by designers and architects, the level of design is far superior to those made for the home.

There are many wall-surfacing materials using fabrics laminated to paper. These coverings provide warmth and texture, as well as acoustic properties. Fabrics in general have been used widely as wall-coverings in the past and continue to be popular.

A designer’s imagination and the client’s budget are the only limitation on the materials that may be used for wall surfacing. Some, such as ceramic or mosaic tiles, are extremely practical; some, such as cork, have excellent acoustical characteristics. For functional or for aesthetic reasons the designer may elect to use such materials as leather, metals, plastic laminates, or glass. No wall in itself should be designed or selected without relation to the total scheme.

Windows and doors

Windows and doors in contemporary design are not placed as decorative elements or as parts of symmetrical compositions but are primarily considered as functional elements and are expressed as such. If windows are carefully designed and placed for light, for ventilation, for air, and for view, decorative treatment is often unnecessary and a simple device such as a shade or shutter will suffice to control light and privacy. Most buildings, however, need window treatments, since no particular care in the placement of fenestration was taken by the builders.

The most frequently used devices are curtains and draperies. Although semantically there is no clear distinction between the two, drapery implies more elaborate treatments with lining, overdrapes, valances, and tassels. A curtain, on the other hand, is lighter, more direct, less theatrical, and more functional. Frequently, a light material is chosen to provide privacy or light control with minimum emphasis. Curtains, however, offer only partial control over light, glare, and privacy; complete control or privacy often requires shades, blinds, or shutters. Window shades without overly ornate borders and tassels are a perfectly good device for those controls, and Venetian blinds are also a most acceptable treatment.

Since the 1960s designers have tried to simplify window treatments, and, if curtains, shades, or blinds were not deemed appropriate for functional or aesthetic reasons, devices such as chains or beads on windows or very simple sliding panels were found to be more effective than more elaborate treatments.

The essential considerations for windows must be based on the functional needs and on the overall aesthetic intent. If a space is well designed in architectural terms and presents a cohesive image, it rarely makes sense to feature a window or door. Poorly detailed windows in office buildings or apartment houses are often overcome or played down by using a simple curtain material covering a complete window wall. The wall-to-wall and floor-to-ceiling treatment of a window wall is frequently the only way to screen out unattractive details.

Doors must be carefully planned, relating the swing and location to the functional needs, and their heights, colour, material, or textures to the adjoining wall surfaces or design elements in the space. Most doors used in the 20th century are “flush” doors—that is, they have unbroken surfaces made of wood or metal; even where glass is used the attempt is usually made to have maximum glass area unbroken by frames and moldings. Sometimes the entrance doors to important spaces are designed or decorated as compositional focal points, but usually the emphasis is on excellence in detailing and hardware rather than on decorative surface designs.