| All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| Ultron | A registered trademark of Monsanto for nylon. |
| Under-Coat | After the primary coat is dry , second coat or under-coatings are applied on the primed surface. The color of the under-coat should approximately be of the same shade as that of the desired finish. It should be a thin opaque film , free from brush marks. |
| Under-Drapery | A lightweight, usually a sheer drapery that hangs behind the heavier over-drapery. Find draperies and curtains. |
| Under-Pinning | This term is applied to the building of new work underneath an existing structure without disturbing its stability. It may be necessary when defective foundation of a wall is to be replaced with new foundation or when the existing foundation of a wall is required to be strengthened to enable it to carry more loads. |
| Undertones | The addition of a small amount of one hue to another, rendering the latter slightly warm or cool. |
| Unfinished Furniture | Furniture made from wood that hasn't been treated with any type of finish, which allows the buyer to stain or finish the furniture to their particular taste. Find unfinished furniture. |
| Unity | A component of harmony (an element of design) that provides a change or relief from sameness in an interior through differences in the design and furnishing elements. |
| Universal Design | Design that meets the needs of all users, without drawing attention to those with disabilities. |
| Upholstered Cornice | A wooden top treatment that is padded, then covered with a decorative top treatment. |
| Upholstered Walls | Padded, then fabric-covered walls. |
| Upholstery | The process of fitting furniture, usually seating, with padding, springs, and webbing, with a fabric or leather cover. |
| Uplight | Also used to describe the lights themselves, this is actually the term for light that is directed upward toward the ceiling. |
| Uplighters Or Uplighting | Canisters, spotlights, or floodlights that cast light upward to the wall or ceiling. |
| Uprights | The outer vertical posts of a chair. |
| Urethane Foam | Synthetic foam used for carpet and upholstery padding. |
| Urethane Foam (Polyurethane) | Flexible polyurethane foam is used as a cushioning material in upholstered furniture seats, backs and arms. For seat cushioning, foams that have a density of 1.8 pounds per cubic foot or higher offer the best support and durability. |
| Urinals | They fall under the category of soil appliance and as such the discharge from urinals is connected to soil pipe either directly or through a trap provided with gun-metal or bass domed shaped removable grating. |
| Urn | Term refers to a vase shaped decorative ornament, commonly found as the finial of a broken pediment. |
| User | Anyone who will use a completed design. |
| User Friendly | Computer hardware and software that are relatively uncomplicated and easy to operate. |
| U-Stair | A stair that makes a 180-degree turn at a single landing. |