layer of bitumen felt

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• India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …   Universalium

• Spark arrestor — A spark arrestor is a device intended to prevent combustible materials, usually sparks or other tiny flaming debris, from escaping into areas where they might start fires.They are most commonly used in conjunction with motor vehicles (inserted… …   Wikipedia

• roads and highways — ▪ transportation Introduction       traveled way on which people, animals, or wheeled vehicles move. In modern usage the term road describes a rural, lesser traveled way, while the word street denotes an urban roadway. Highway refers to a major… …   Universalium

• Roof — A roof is the covering on the uppermost part of a building. A roof protects the building and its contents from the effects of weather. Structures that require roofs range from a letter box to a cathedral or stadium, dwellings being the most… …   Wikipedia

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• environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …   Universalium

• Asphalt — Note: The terms bitumen and asphalt are mostly interchangeable, except where asphalt is used as an abbreviation for asphalt concrete For other uses, see Asphalt (disambiguation). Natural bitumen from the Dead sea …   Wikipedia

• building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …   Universalium

• Roof construction — This article is about house construction that consists of beams and an outer weatherproof skin, as found on most domestic architecture. Such roofs may take a number of different shapes. Construction of a ridged roofA simple ridged roof consists… …   Wikipedia

• Kenya — Kenyan, adj., n. /ken yeuh, keen /, n. 1. a republic in E Africa: member of the Commonwealth of Nations; formerly a British crown colony and protectorate. 28,803,085; 223,478 sq. mi. (578,808 sq. km). Cap.: Nairobi. 2. Mount, an extinct volcano… …   Universalium

• Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …   Wikipedia