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INR. (Impact Noise Rating) A single figure rating which provides an estimate of the impact sound insulating performance of a floor-ceiling assembly I-beam. A steel beam with a cross section resembling the letter I; used for long spans as basement beams or over wide wall openings,such as a double garage door, when wall and roof loads bear down on the opening I-joist. Manufactured structural building component resembling the letter "I"; used as floor joists and rafters; include two key parts: flanges and webs; available in lengths up to 60 feet long incandescent lamp. A lamp employing an electrically charged metal filament that glows at white heat; typical light bulb index. The interest rate or adjustment standard that determines the changes in monthly payments for an adjustable rate loan infiltration. The passage of air from indoors to outdoors and vice versa; term is usually associated with drafts from cracks, seams or holes in buildings inside corner. The point at which two walls form an internal angle, as in the corner of a room insulating glass. Window or door in which two panes of glass are used with a sealed air space between; a.k.a. double glass insulation. Any material high in resistance to heat transmission that, when placed in the walls, ceiling, or floors of a structure, and will reduce the rate of heat flow Insulation, thermal. Any material high in resistance to heat transmission that, when placed in the walls, ceiling, or floors of a structure, will reduce the rate of heat flow insulation board, rigid. A structural building board made of coarse wood or cane fiber in ½- and 25/32-inch thickness; can be obtained in various size sheets and densities interest. The cost paid to a lender for borrowed money interior finish. Material used to cover the interior framed areas of walls and ceilings interlocking shingles. Individual shingles that mechanically fasten to each other to provide wind resistance irrigation. Lawn sprinkler system
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