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Home My WebLink Aboutordinance.council.045-76RECORD OF PROCEEDINGS 100 Leaves ORDINANCE NO. ~ (Series 1976) AN ORDINANCE ~ENDING SECTION 7-141 OF THE ASPEN MUNICIPAL CODE BY THE ADDITION TO THE UNIFORM BUILDING CODE (1973 EDITION) OF CHAPTER 53 ENTITLED "LNERGY CONSERVATION AND THERMAL INSULATION"; WHICH SAID AMEND- MENT ESTABLISHES MINIMUM THE~4AL INSULATION STANDARDS FOR ALL OCCUPANCIES (EXCEPT CERTAIN MOBILE HOMES AND ALL SINGLE FAMILY RESIDENCES) FOR STRUCTURES WITHIN THE CITY OF ASPEN, COLORADO. ~;HEREAS, the Aspen City Council has determined that the promotion of energy conservation is of immediate importance and that there should be established minimum thermal insulation standards for construction within the City of Aspen, Colorado, and WHEREAS, authorities of Pitkin County, Colorado, have pro- l~ulgated certain insulation standards which can, with minor changes, ~e applied to the City of Aspen and the City Council wishes to adopt the same, NOW, THEREFORE, BE IT ORDAINED BY THE CITY OF ASPEN, COLORADO: Dection 1 That the Municipal Code of the City of Aspen, Colorado, is hereby amended by the addition of subsection (o) to Section 7-141 which said subsection reads as follows: (o) The Uniform Building Code, 1973 Edition, is hereby amended by the addition of Chapter 53 to such code, which said Chapter reads as follows: CHAPTER 53 ENERGY CONSERVATION AND THERMAL INSULATION PURPOSE: Section 5301. ?his section encourages minimum fossil fuel consumption by establishing minimum thermal RECORD OF PROCEEDINGS 100 Leaves insulation standards for all occupancies and the use of innovative energy conservation techniques in buildings. APPLICATION AND SCOPE: Section 5302. This Section shall apply to all buildings and structures in use Groups H (Hotels, Apartment Houses-Condominiums), F2 (Mercantile and Business buildings), C, D, A, B-l, B-2, B-3 (Insti- tutional structures). DEFINITIONS: Section 5303. For the purposes of this Section, the following definitions shall apply: ASHRAE is the American Society of Heating, Refrig- erating and Air Conditioning Engineers. DEGREE DAY is a unit, based upon temperature differ- ence and time, used in estimating fuel consumption and specifying nominal heating load of a building in winter. For any one day, when the mean temperature is less than 65°F, there exist as many degree days as there are Fahrenheit degrees difference in temperature be- tween the mean temperature for the day and 65°F. GLAZING is all transparent or translucent materials in exterior openings. i~XTERIOR WALL AREA is the gross area of wall sur- faces adjacent to heated spaces, including glazing and doors, exposed to ambient climatic temperatures measured for a dwelling unit or group of units served by a heating system. INFILTRATION is air flowing inward as through a wall, crack, etc. SPECIAL GLAZING is glazing which has a minimum U factor of .70 for all glazed surfaces. CHERMAL CONDUCTIVITY (K-FACTOR) is the time rate of heat flow through one square foot of homogeneous material one inch thick when there is a temperature difference of one degree F. between the opposite faces of the material expressed in B.t.u./hour, square foot, degree F. ~er inch. THERMAL RESISTANCE (R) is the measure of the resis- tance of a material or building compOnent to the passage of heat. The resistance value (R) of mass-type insula- tions shall not include any value for reflective facing. TRANSMISIVITY is the capacity of a material to trans- nit radiant energy. U FACTOR is the total heat flow through a given con- struction assembly, air to air, expressed in B.t.u./hour, per square foot, per degree F. temperature difference. -2- RECORD OF PROCEEDINGS 100 Leaves where R~ equals the sum of the resistance (R) for the individual components of the assembly. U factors shall be calculated according to ASHkAE methods. UNHEATED SPACES are any spaces exposed to ambient temperatures and not provided with a heat supply capable of maintaining a minimum temperature of 45°F. Section 5304. Duilding Insulating Material Standards. Ail materials used in the insulation of buildings in order to comply with this section shall conform with the following standards: Cork board Cellular glass Expanded polystyrene insulation board Fiberboard Insulation Board (Urethane) InsDlation, Thermal (Perlite) Mineral fiber, pouring or blowing Mineral wool Mineral wool (roof) Perlite, Silicone treated loose fill *Reflective, thermal *Structural fiberboard insulating roof deck Vegetable or wood fiber Vermiculite Vermiculite, water repellant loose fill Wood fiber blanket F.S. HH-I-561 F.S. I!H-I-551 F.S. HH-I-524 F.S. LLL-1535 or ASTM C-208, Class C F.S. tiH-I-530 F.S. HH-I-574 F.S. HH-i-1030 F.S. itH-I-521 F.S. EH-I-526 FHA UM-37 F.S. HH-i-1252 AIMA IB Spec #1 F.S. HH-I-515 F.S. HH-I-585 FHA UM-30 CS-160 Expanded perlite: F.S. HH-I-526 may be modified to permit the basic material to be a mineral substance made of rock, slag or a mixture thereof, processed from a natural state into fiberous or cellular form with a minimum density of 8 lbs. per cubic foot. be Perimeter insulation shall comply with the FHA test procedure, "?est Procedure to Determine Acceptability of Perimeter Insulation for Concrete Floor on Ground" dated June, 1956. 2. Labeling: Mineral Fiber Insulation shall be labeled as follows: a. Blanket type, or combination blanket with reflective facing: (1) Name of manufacturer or distributor (2) Insulation type (3) Thermal resistance "r" value of insulation fiber at the labeled insulation thickness. -3- RECORD OF PROCEEDINGS 100 Leaves be Type I blankets with no membrance cover may either bear a label on a partial membrane facing or may be branded with vertical stripes. Three stripes indicates the thermal resistance R equals 11. Five stripes indicates a resistance R equals 19. No lower "R" value is acceptable. Ce Types II and III blankets with non-reflective and reflective membrane coverings respectively, shall be labeled with appropriate "R" value of 7, 11, or 19. ~o lower "R" value is acceptable. ~hermal resistance "R" values apply to mineral fiber only. 2.1 Reflective Insulation a. Blanket Type (1) Name of manufacturer or distributor (2) Insulation type (3) Thermal resistance "R" value. (R value to include single or multi-layers, foil or kraft backed, one or both sides.) (4) Designate direction of heat flow. Identification labeling and marking of all other acceptable building insulating material shall comply with their appropriate standard listed in this section. Section 5305. Thermal Design Standards for Ceilings and Walls. Ceilings: The maximum U-value for ceilings shall be 0.05. All occupancies with a floor to ceiling height in excess of twelve feet shall have a maximum U-value for ceilings of 0.04. 2. Walls: Ail buildings and structures in Groups It shall have a maximum U-value for walls above grade of 0.05. Masonry and structural concrete walls have a maximum U-value of .085 if the insulating materials are placed on the wall's exterior. Ail buildings and structures in Groups F2, C, D, A, B-l, B-2, and B-3 shall have a maximum U-value for walls above grade of 0.085. c. Walls of unheated spaces need not be insulated. Basement walls below grade shall have a maximum U-value of 0.09. This is required if the base- ment space is provided with a positive heat supply to maintain a minimum temperature of 50°F. Section 5306. Floor Section, Foundation Walls and Slabs- on-Grade. t. Ail buildings and structures in Group H. -4- RECORD OF PROCEEDINGS 100 Leaves ae Floors over unheated basements, crawl spaces and garages: The maximum U-value shall be 0.05 or the walls of the foundation shall be insulated to a depth of the footings with a maximum U-value of 0.09. be Slabs-on-Grade: Perimeter insulation shall be required from the top edge of the slab to a depth of 2 feet below grade. The maximum U-value shall be 0.1. Ce Structural Concrete mats on grade shall be required to perimeterly insulate the full depth of the mat. The maximum U-value shall be 0.1. 2. A-1 buildings and structures in Groups F2, C, D, A, B-l, B-2 and B-3: Floors over unheated basements, crawl spaces: ?he maximum U-value shall be 0.08 or the walls of the foundation shall be insulated to a depth of the footings with a maximum U-value of 0.09. be Slabs-on-Grade: Perimeter insluation shall be required from the top edge of the slab to a depth of 2 feet below grade. The maximum U-value of the insulation shall be 0.2. Structural concrete mats on grade shall be required to perimeterly insulate the full depth of the mat. ~he maximum U-value shall be 0.1. Section 5307. Thermal Design Standards for Glazing. Ail windows, skylights, and doors shall be glazed with insulating glass as defined in the ASHRAE Guide - double glazing - or shall be equipped with storm windows and storm doors. Closure providing equiva- lent resistance to heat transmission will be acceptable. EXCEPTION: Ail buildings in Group F2 may use single glazing for display areas which are completely sealed from the interior heated spaces. The total glazing area of a building shall not exceed 14% of the total floor area for all classes of structures. a. Skylights shall be included as glazing areas in these calculations. South facing glazing of a building, i.e., glazing oriented to compass coordinated 165°-195°, shall note be restricted as to total glass area upon meeting the following requirements: (1) South glazing shall be clear and untreated. (2) The total combined glazing area on all other exposures (compass coordinates other than 165°-195°) shall not exceed -5- RECORD OF PROCEEDINGS 100 Leaves 12.5% of the total floor area for all classes of structures. Skylights shall be included as glazing areas. Section 5308. Heat Distribution Equipment. 1. Ail heating distribution duckwork and piping running through unheated spaces shall be insulated. a. ~inimum R value of duct insulation R=5.55 b. Minimum R value of piping insulation R=3.7 Seciton 5309. Infiltration. Caulking and Sealing: Exterior joints around windows and door frames, Detween wall and foundations, between wall and roof, between wall panels, at penetrations of utility services through walls, floors and roofs, and all other openings in the exteriors envelope shall be caulked, gasketed or otherwise weather- stripped. Ail buildings in Groups F2, A, B-i, B-2, B-3, C and D shall be required to institute entrance sealing by using doubled entrance systems. Section 5310. Requirement for Day-Night Thermostats. Ail structures in groups F?, A, B-i, B-2, B-3, C and D shall be required to instaI1 day-night thermostats to reduce heating demand during periods when building is not occupied. Section 5311. Design Conditions. 1. Ail H and D group structures shall use an outside design temperature of -15°F. 2. Ail buildings in groups F~, A, 3-1, B-2, 3-3 and C shall use an outside design temperature of -10°F. Section 5312. Design Flexibility Structures shall be exempt from sections 5304, 3305, 5307, 5309 of Chapter 53 Energy Conservation and Thermal Insulation upon meeting all the following requirements: The maximum designed load for space heating per square foot of heated floor space shall be as follows: OCCUPANCY OR USE Residential and Multi Family MAXIMUM DESIGN LOAD FOR SPACE HEATING FOR SQUARE FOOT OF HEATED FLOOR SPACE Btuh/ft2 18 Btuh/ft2 Commercial, Institutional and Office Buildings 24 Btuh/ft2 Restaurants, Auditoriums, Gymnasiums, Theaters, Churches and all other buildings where outside air is gov- arned by make-up air requirements 30 Btuh/ft2 -6- RECORD OF PROCEEDINGS 100 Leaves Ail calculations for determination of the design following design con- shall use the heating load ditions: a. Ail H and D structures shall use an outside design temperature of -15°F, interior design temperature of 70°F. All buildings in groups F2, A, B-l, B-2, B-3, C shall use an outside design temperature of -!0°F, interior design temperature of 70°F. 3. The building department will require calculations by a registered professional engineer or architect in the State of Colorado to justify compliance with the requirements of Chapter 53. Such calculations shall conform to the procedure outlined by the American Society of Heating, Refrigeration, Air-Conditioning Engineers. Section 5313. Exemptions to Chapter 53 Requirements. All dwelling units approved by the Colorado Division of Housing as meeting the mobile home standard ANSI 119.1, and all single family residences, shall be exempt from the provisions of this Chapter 53. Section 2 It shall be unlawful for any person, firm or corporation to erect, construct, enlarge, alter, repair, I~ove, improve, remove, convert, or demolish, equip, use, occupy or maintain any building or structure within the City or cause the same to be done contrary to or in violation of any provisions of this ordinance. Any person, firm or corporation violating any of the provisions of this ordinance shall be deemed guilty of a misdemeanor, and each person shall be deemed guilty of a separate offense for each and every day or portion thereof during which any violation of any of the provisions of this ordinance is committed, continued or permitted, and upon conviction of any such violation such person shall be punishable by a fine of not more than Three Hundred Dollars ($300.00) or by punishment for not more than ninety (90) days, or by both such fine and imprisonment. Section 3 If any provision of this ordinance or the application thereof -7- RECORD OF PROCEEDINGS 100 Leaves tO any person or circumstance is held invalid, such invalidity shall not affect other provisions or applications of the ordinance which can be given effect without the invalid provisions or appli- cations and to this end the provisions or applications of this ordinance are declared to be severable. Section 4 A public hearing on this ordinance shall be held on ~~ ~ , 1976, at 5:00 P.M. in the City Council Chambers, City Hall, Aspen, Colorado. INTRODUCED, READ AND ORDERED published as provided by law by the City Council of the City of Aspen at its regular meeting held ATTEST: WILSON, Deputy City si k D ~ tan~. ATTEST: Stack7 Sta~dley III Mayor ~ , 1976. ~ity Cle~ ./ -3- RECORD OF PROCEEDINGS 100 Leaves STATE OF COLORADO ) ) COUNTY OF PITKIN ) ss. CERTIFICATE I, Kathryn S. Hauter, City Clerk of Aspen, Colorado, do hereby certify that the above and foregoing ordinance was introduced, read in full, and passed on reading e.t a regular meeting of the City Council of the:City~ of Aspen on ~_~, ' ,~ 197 , ,, and published in the Aspen Times, a weekly newspaper of general circulation, published in the City of Aspen, Colorado, in its issue of ~~/ /3' , 197 ~., and was finally adopted and approved at a regular meeting of the City Council on C-~. ~ and ordered published as Ordinance No. 197~, of said City, as provided by law. Series of and the day of IN WITNESS WHEREOF, I have hereunto set my hand seal of said City of Aspen, Colorado, this ~ ~ , Kat~_n S. Hauter City Clerk