If a number of things or people are under one roof or under the same roof, they are in the same building. The firms intend to open either together under one roof or alongside each other in shopping malls. to put a roof on a building be roofed with sth. Covering of the top of a building. Roofs have been constructed in a wide variety of forms flat, pitched, vaulted, domed, or in combinations as dictated by regional, technical, and aesthetic considerations. Thatched roofs, usually sloping, were the earliest type and are still used in rural Africa and elsewhere. Flat roofs have historically been used in arid climates where drainage of water off the roof is not important, as in the Middle East and the southwestern U.S. They came into more widespread use in the 19th century, when new waterproof roofing materials and the use of structural steel and concrete made them more practical. Sloping roofs come in many different varieties. The simplest is the lean-to (or shed) roof, which has only one slope. A roof with two slopes that form a triangle at each end is called a gable roof. A hipped (or hip) roof has sloping sides and ends meeting at inclined projecting angles called hips. The gambrel roof has two slopes on each of its two sides, the upper being less steep than the lower. The mansard roof has two slopes on all four sides, a shallower upper part and a steeper lower part. See also hammer-beam roof
The cover of any building, including the roofing (see Roofing) and all the materials and construction necessary to carry and maintain the same upon the walls or other uprights
A building element that provides protection against the sun, wind, and precipitation
The roof of a car or other vehicle is the top part of it, which protects passengers or goods from the weather. The car rolled onto its roof, trapping him
The roof of a building is the covering on top of it that protects the people and things inside from the weather. a small stone cottage with a red slate roof
In the case of a building with vaulted ceilings protected by an outer roof, some writers call the vault the roof, and the outer protection the roof mask