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4 CITY OF NORTH OI,MSTED ORDINANCE NO . 7 5 - ~~..,~ Page 2. their perimeter - R/5; and, a. installed vertically from top of slab floor to below the frost line around the perimeter of the slab, or b. installed vertically from the top of slab floor and extended down the thickness of the slab and then continued horizontally back under the slab to a width of at least two feet around the perimeter of the slab floor. 3. Heating/cooling ducts that are installed. in slab floors shall be enclosed by the warm winter side of the perimeter insulation in the manner pro- vided in 2-(b) above. (d) Windows 1. Windows, including basement windows, shall be double-glazed or installed with storm windows. 2. Metal windows shall provide a thermal break between the inside and outside surface areas. (e) Doors 1. Doors shall be insulated with an insulation core, or 2. Doors that are uninsulated shall be installed with storm doors. 1303.02 Caulking. and Sealants Exterior joints around windows and door frames, between wall and foundation, between wall and roof, between wall panels, at penetrations of utility services through walls, roofs, and through floors over unheated spaces, and all other openings in the exterior envelope of said dwelling structures shall be caulked, gasketed, weatherstripped, or otherwise sealed to prevent air leakage in accordance with Federal Specification TT-S-001657 - Type 1 or better. 1303.03 Vapor Barriers 1. All insulation shall be installed with vapor barriers, rated 1 perm or less, on the warm winter side of the insulation; provided, however, that vapor barriers shall not be required for top- ceiling areas that meet the attic ventilation provisions of Section 1529.11 of the Regional Dwelling House Code or applicable provisions of the Ohio Building Code.