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Item 6E P&DSD LANNING EVELOPMENT ERVICES EPARTMENT BID UILDING NSPECTIONS IVISION 1400MS,S250,S,TX76092 AIN TREET UITE OUTHLAKE www.cityofsouthlake.com M E M O R A N D U M March 4, 2008 TO: Shana Yelverton, City Manager FROM: Paul Ward, CBO, Building Official SUBJECT : Ordinance No. 932, 2nd Reading, adopt the 2006 International Energy Conservation Code. Purpose: The purpose of Ordinance No. 932 is to update the Energy Conservation Code of the City to the 2006 Edition. Applicability: The Energy Conservation Code establishes minimum prescriptive and performance-related regulations for the design of energy- efficient buildings and structures in the City of Southlake Methodology: Since 1967, the North Central Texas Council of Governments has actively promoted the standardization of model construction codes in an effort to simplify the construction process, advance the safety of building systems, promote common code interpretation, facilitate the mobility of contractors, and reduce training and construction costs. The Regional Codes Coordinating Committee (RCCC) and its four Advisory Boards comprised of local public and private code professionals continually review the latest editions of the model construction codes and recommend uniform amendments for the North Central Texas region. The City of Southlake has representatives sitting on the various committees participating in the regional recommendation process. Page 1 of 16 BBA On January 24, 2008 the Building Board of Appeals met to consider the proposed ordinances adopting the 2006 I Codes. Charles Bloomberg, Plans Examiner and David Barnes, Fire Marshal explained the changes in the I Codes from 2003 to 2006. Mr. Bloomberg explained the most significant changes; 1) Residential sprinkling to include non-living space equaling 6,000 square feet or greater (garages and unfinished bonus rooms). 2) New fee for unauthorized cover up during construction. 3) Plumbing AAV (Air Admittance Valve) must be approved prior to installation and must be marked on plans. Discussion: Board members and Staff discussed general code compliance. A motion was made to recommend adoption of 2006 I Codes with local amendments. Motion Passed unanimously. SPIN: On January 28, 2008, staff held a citywide SPIN meeting in Southlake Town Hall to present the 8 ordinances in the current 2006 code package. Explanation was given of the impact, focusing primarily on residential construction. Questions were asked about specific applications, but no specific objections were aired. Action Requested : Conduct a public hearing and make a recommendation on Ordinance No. 932, adopting the 2006 International Energy Conservation Code and certain local amendments. Attachments: Attachment A- International Codes Update Memo. Attachment B- Proposed Ordinance 932, 2006 International Energy Conservation Code. Page 2 of 16 M E M O R A N D U M Date: January 29, 2008 TO: Paul Ward, Chief Building Official FROM: Chuck Bloomberg, Plans Examiner SUBJECT: International Codes Update The City of Southlake has adopted the International Code Council’s construction codes as our local building codes with regional and local amendments. The codes are continually updated on the national level and are published every three years. The current codes, the 2006 edition have been reviewed by the Regional Code Coordinating Committee and Executive Council of the North Central Texas Council of Governments and recommended for adoption by area cities.  2006 International Building Code. This code regulates all buildings not covered by the IRC. The administrative chapter includes our permits for grading or “earth disturbance.” The fee section is similar to the IRC ordinance. Again the NCTCOG recommendations are followed except for some items that are more clarification than actual code changes. We follow the NCTCOG choice for group B cities as far as fire sprinkler options, protecting buildings greater than 6000 square feet as we have since 1994 with some modifications.  2006 International Fire Code. This code establishes regulations affecting or relating to structures, processes, premises and safeguards regarding: (1.) The hazard of fire and explosion arising from the storage, handling or use of structures, materials or devices; (2.) Conditions hazardous to life, property or public welfare in the occupancy of structures or premises; (3.) Fire hazards in the structure or on the premises from occupancy or operation; (4.) Matters related to the construction, extension, repair, alteration or removal of fire suppression or alarm systems. Amendments include NCTCOG recommendations and Fire Services recommendations.  2006 International Energy Conservation Code. This is the code mandated by state law with specific language that we may not amend it in any way less restrictive than the original code adopted in 2001. The law established the Energy Systems Laboratory at Texas A & M University as the judge as to what is or is not less restrictive. ESL worked closely with NCTCOG in making recommendations for this edition of the code. Attachment A International Codes Update Memo Page 3 of 16  2006 ICC Electrical Code Administrative Provisions. This code adopts the 2008 National Electrical Code by reference as written without amendments and also gives the administrative provisions consistent with the other International Codes. • 2006 International Plumbing Code. This code regulates plumbing systems including water and sewage and storm sewer piping systems and their fixtures. The Plumbing ordinance limits amendments to those recommended by NCTCOG. • 2006 International Fuel Gas Code. This code regulates gas piping, fuel burning appliances and their vents. Again amendments are limited to the NCTCOG recommendations. • 2006 International Mechanical Code. This code regulates Heating, Air Conditioning and mechanical ventilation systems. The NCTCOG amendments have been recommended for the IMC. • 2006 International Residential Code. This code regulates one and two-family dwellings and townhouses not over three stories high and their accessory structures. The IRC is unique in that one book covers all construction for dwellings including building, electrical, plumbing, energy conservation, plumbing, heating and air conditioning and fuel gas piping. Other than in the administrative chapter and appendix chapters the amendments are as recommended by NCTCOG. In section 108.8 an unauthorized cover up fee was added to help get final inspections on swimming pools prior to filling them. The energy code provisions were revised by ICC and therefore had to be amended to remain in compliance with state law. The residential sprinkler requirements were changed as recommended by Fire Services. Attachment A International Codes Update Memo Page 4 of 16 2006 International Energy Conservation Code February 11, 2008 ORDINANCE NO. 932 AN ORDINANCE ADOPTING THE 2006 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, REGULATING THE DESIGN OF BUILDING ENVELOPES FOR ADEQUATE THERMAL RESISTANCE AND LOW AIR LEAKAGE AND THE DESIGN AND SELECTION OF MECHANICAL, ELECTRICAL, SERVICE WATER-HEATING AND ILLUMINATION SYSTEMS AND EQUIPMENT IN THE CITY OF SOUTHLAKE; PROVIDING FOR THE ADOPTION OF LOCAL AMENDMENTS THERETO; PROVIDING FOR RECORDING OF SUCH CODE AS A PUBLIC RECORD; PROVIDING THAT THIS ORDINANCE SHALL BE CUMULATIVE OF ALL ORDINANCES; PROVIDING A SEVERABILITY CLAUSE; PROVIDING FOR A PENALTY FOR VIOLATIONS HEREOF; PROVIDING A SAVINGS CLAUSE; PROVIDING FOR PUBLICATION IN PAMPHLET FORM; PROVIDING FOR PUBLICATION IN THE OFFICIAL NEWSPAPER; AND PROVIDING AN EFFECTIVE DATE. WHEREAS, the City of Southlake is a home rule city acting under its charter adopted by the electorate pursuant to Article XI, Section 5 of the Texas Constitution and Chapter 9 of the Local Government Code; and beginning in the spring of 2007, NCTCOG’s Regional Codes WHEREAS, Coordinating Committee (RCCC) and its four advisory boards conducted 20 open review meetings over an 8-month period to review the 2006 editions of the International Codes and to develop regional amendments. Their review and recommendations were completed and endorsed by NCTCOG’s Executive Board in September 2007. Now NCTCOG encourages jurisdictions in North Central Texas to adopt the 2006 International Energy Conservation Code along with its respective regional amendments with an effective date of April 1, 2008: NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF SOUTHLAKE, TEXAS: SECTION 1 That the International Energy Conservation Code, 2006 Edition, published by the International Code Council, including the standards referenced therein, is hereby adopted as the Energy Conservation Code of the City of Southlake regulating the design of building envelopes for adequate thermal resistance and low air leakage and the design and selection of mechanical, electrical, service water-heating and illumination systems and equipment in the City of Southlake, except for fuel facilities otherwise regulated under the International Residential Code for One- and Two- Family Dwellings as adopted. A true and correct copy of this document is attached as Exhibit "A." Attachment B Page 5 of 16 2006 International Energy Conservation Code SECTION 2 That the 2006 International Energy Conservation Code, as adopted herein, is hereby amended as provided in Exhibit "B" incorporated herein and attached hereto for all purposes of this ordinance. The City of Southlake, Texas may from time to time determine that additional local modifications to the Energy Conservation Code are necessary and appropriate to meet the unique needs of the City of Southlake, Texas. To effectuate these local modifications, the City Council shall enact individual ordinances amending this Ordinance, fully setting forth the change to be made in the Energy Conservation Code. These amendments shall be consolidated as Exhibit "B" to this Ordinance. SECTION 3 The material contained in Exhibits “A” and “B” to this ordinance shall not be included in the formal municipal codification of ordinances, but shall be maintained as a public record in the office of the City Secretary and will be available for public inspection and copying during regular business hours. SECTION 4 This ordinance shall becumulative of all provisions of ordinances of the City of Southlake, Texas, except where the provisions of this ordinance are in direct conflict with the provisions of such ordinances, in which event the conflicting provisions of such ordinances are hereby repealed. SECTION 5 It is hereby declared to be the intention of the City council that the phrases, clauses, sentences, paragraphs, and sections of this ordinance are severable, and if any phrase, clause sentence, paragraph or section of this ordinance shall be declared unconstitutional by the valid judgment or decree of any court of competent jurisdiction, such unconstitutionality shall not affect any of the remaining phrases, clauses, sentences, paragraphs and sections of this ordinance, since the same would have been enacted by the City Council without the incorporation in this ordinance of any such unconstitutional phrase, clause, sentence, paragraph or section. SECTION 6 Any person, firm or corporation who violates, disobeys, omits. neglects or refuses to comply with or who resists the enforcement of any of the provisions of this ordinance shall be fined not more than Two Thousand Dollars ($ 2,000.00) for all violations involving zoning, fire safety or public health and sanitation, including dumping or refuse, and shall be fined not more than five hundred dollars ($500) for all other violations of this ordinance each day that a violation is permitted to exist shall constitute a separate offense. SECTION 7 All rights and remedies of the City of Southlake are expressly saved as to any and all violations of the provisions of any ordinances affecting the regulation of the design of Attachment B Page 6 of 16 2006 International Energy Conservation Code building envelopes for adequate thermal resistance and low air leakage and the design and selection of mechanical, electrical service water-heating and illumination systems and equipment within the City which have accrued at the time of the effective date of this ordinance; and, as to such accrued violations and all pending litigation, both civil and criminal, whether pending in court or not, under such ordinances, same shall not be affected by this ordinance but may be prosecuted until final disposition by the courts. SECTION 8 The City Secretary of the City of Southlake is hereby authorized to publish this ordinance in book or pamphlet form for general distribution among the public, and the operative provisions of this ordinance as so published shall be admissible in evidence in all courts without further proof than the production thereof. SECTION 9 The CitySecretary of the City of Southlake is hereby directed to publish in the official newspaper of the City of Southlake, the caption, penalty clause, publication clause and effective date of this ordinance one time within ten days after passage of this ordinance, as required by Section 3.13 of the Charter of the City of Southlake. SECTION 10 This ordinance shall be in full force and effect from and after its passage and publication as required by law and it is so ordained. PASSED AND APPROVED ON FIRST READING THIS DAY OF , 2008. MAYOR ATTEST: CITY SECRETARY PASSED AND APPROVED ON SECOND READING THIS DAY OF , 2008. MAYOR ATTEST: CITY SECRETARY Attachment B Page 7 of 16 2006 International Energy Conservation Code APPROVED AS TO FORM AND LEGALITY: City Attorney Date: EFFECTIVE: Attachment B Page 8 of 16 2006 International Energy Conservation Code EXHIBIT “B” Recommended Amendments to the 2006 International Energy Conservation Code North Central Texas Council of Governments region The following sections, paragraphs, and sentences of the 2006 International Energy Conservation Code are hereby amended as follows: Standard type is text from the IECC. Underlined type is text inserted. Lined through type is deleted text from the IECC. A double asterisk at the beginning of a section identifies an amendment carried over from the 2003 edition of the code and a triple asterisk identifies a new amendment with the 2006 edition of the code. After each code amendment a reason is given in parentheses. The reason is not a part of the code, but is given to aid in understanding the code. Section 101.4.2 Historic Buildings ***Amend to read as follows: 101.4.2 Historic Buildings. Any building or structure that is listed in the State or National Register of Historic Places; designated as a historic property under local or state designation law or survey; certified as a contributing resource with a National Register listed or locally designated historic district; or with an opinion or certification that the property is eligible to be listed on the National or State Registers of Historic Places either individually or as a contributing building to a historic district by the State Historic Preservation Officer of the Keeper of the National Register of Historic Places, are exempt from shall comply with all of the provisions of this code. Exception: Whenever a provision or provisions shall invalidate or jeopardize the historical designation or listing, that provision or provisions may be exempted. (Reason: This is less restrictive than the legislative mandates. It is reasonable to expect compliance with duct sealing, replacement lighting and the installation of insulation, for example, when possible.) Section 102.2.2. Insulation installed in walls. ***Add to read as follow: Section 102.2.2. Insulation installed in walls. Insulation batts installed in walls shall be totally surrounded by an enclosure on all sides consisting of framing lumber, gypsum, sheathing, wood structural panel sheathing or other equivalent material approved by the building official.` (Reason: This will increase the performance of the batt insulation by eliminating the potential for drafts and insure that the batt insulation stays in place) ***Section 103.1.1 Above code programs. Amend to read as follows: Attachment B Page 9 of 16 2006 International Energy Conservation Code 103.3.1.1 Alternative compliance . A building certified by a national, state, or local accredited energy efficiency program and determined by the Energy Systems Laboratory to be in compliance with the energy efficiency requirements of this section may, at the option of the Code Official, be considered in compliance. The United States Environmental Protection Agency's Energy Star Program certification of energy code equivalency shall be considered in compliance. (Reason: This amendment is added to allow alternative compliance in accordance with th Texas HB 1365, 78 Legislature.) ***SECTION 202 GENERAL DEFINITIONS Amend by adding the following definition: GLAZING AREA. Total area of the glazed fenestration measured using the rough opening and including sash, curbing or other framing elements that enclose conditioned space. Glazing area includes the area of glazed fenestration assemblies in walls bounding conditioned basements. For doors where the daylight opening area is less that 50 percent of the door area, the glazing area is the daylight opening area. For all other doors, the glazing area is the rough opening area for the door including the door and the frame. (Reason: Since the window to wall area ratios have been added to the glazing area prescriptive tables, it is necessary to define .) ***Section 301.1 Amend to read as follows: 301.1 General. Climate zones from Figure 301.1, Figure 301.2, or Table 301.1(1), Table 301.2(1), or Table 301.3(3) shall be used in determining the applicable requirements from Chapters 4 & 5. Locations not in Table 301.1 (outside the US) shall be assigned a climate zone based on Section 301.3. ***FIGURE 301.2 –TEXAS CLIMATE ZONES Amend the code by inserting Figure 301.1 immediately following : (See next page for figure) Attachment B Page 10 of 16 2006 International Energy Conservation Code FIGURE 301.2: TEXAS CLIMATE ZONES FIGURE (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature.) TABLE 301.1 ***Amend to read as follows: TABLE 301.1 CLIMATE ZONES AND SUB CLIMATE ZONES FOR THE NCTCOG AREA All of the NCTCOG area including COLLIN, DALLAS, DENTON, ELLIS, ERATH, HOOD, HUNT JOHNSON, KAUFMAN, NAVARRO, PALO PINTO, PARKER, ROCKWALL, SOMMERVELL, TARRANT and WISE counties are in climate zone 3.2(MOIST). (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature. Also data not applicable beyond North Central Texas area was eliminated.) Attachment B Page 11 of 16 2006 International Energy Conservation Code *** TABLE 301.2 WARM HUMID COUNTIES AND TERRITORIES Amend as follows: TABLE 301.2 WARM HUMID COUNTIES FOR THE NCTCOG AREA All of the NCTCOG area including COLLIN, DALLAS, DENTON, ELLIS, ERATH, HOOD, HUNT JOHNSON, KAUFMAN, NAVARRO, PALO PINTO, PARKER, ROCKWALL, SOMMERVELL, TARRANT and WISE counties are classified as Warm Humid. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature. Also data not applicable beyond North Central Texas area was eliminated.) ***Section 401.2.1. Compliance software tools. Add to read as follows: 401.2.1. Compliance software tools. Software tools used to demonstrate energy code compliance that are deemed acceptable by the building official. The PNL program RES Check is not acceptable for residential compliance. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when adopting subsequent editions of energy codes in accordance th with Texas SB 5, 77 Legislature.) Section 402.1.1 Insulation and fenestration criteria. ***Amend to read as follows: 402.1.1 Insulation and fenestration criteria. The building thermal envelope shall meet the requirements of Table 402.1.1 based on the climate zone specified in Chapter 3. The use of REScheck™ shall not be an acceptable means of demonstrating envelope compliance. When compliance using Table 402.1.1 is demonstrated with a ceiling R-value of R30 or less, no more than 33% of the total projected ceiling area may be of cathedral type construction (ceiling joist/roof rafter assembly) and the required insulation R-value may be reduced to a minimum of R22 insulation when the remaining ceiling area insulation is increased to R38. (Reason: The use of REScheck™ to demonstrate energy code compliance does not th satisfy the “less restrictive” requirement imposed by SB5, 77 Legislature. This amendment is compatible with the previous amendments increasing the number of builders who could use the "simplified prescriptive" approach of the IRC and incorporates the Home Builder Association prescriptive package proposal. The addition of “Ceiling Joist/Roof Rafter Assembly” requirements protect such assemblies from the damage likely to occur if greater amounts of insulation were attempted in such assemblies.) TABLE 402.1.1 INSULATION AND FENESTRATION *** Amend REQUIREMENTS BY COMPONENT to read as follows: Attachment B Page 12 of 16 2006 International Energy Conservation Code TABLE 402.1.1 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT a (TEXAS) MAX GLAZED MASS CLIMATE AREA TO MAX MAX WALL MIN MIN MIN MIN WOOD - SUB WALL GLAZED SKYLIGHT MAX GLAZED MIN R-FLOOR BASEMENT MIN SLAB CRAWL FRAME WALL U-R-R-VALUE CLIMATE AREA FENESTRATIOFENESTRATION CEILING VALUE WALL SPACE WALL d bc R-VALUE N U-FACTOR R-VALUE R-VALUE R-VALUE ZONE RATIO FACTOR SHGC VALUE & DEPTH 15 0.60 0.65 0.40 30 13 6 19 6 0 7 20 0.54 0.65 0.40 38 13 6 19 6 0 7 25 0.51 0.65 0.40 38 16, 13 + 7 19 6 0 7 e 3.2 3.7 30 0.46 0.65 0.38 38 16, 13 + 7 19 6 0 7 e 3.7 For SI: 1 foot = 304.8 mm. a. -values are minimums. -factors and SHGC are maximums. R-19 shall be permitted to be compressed into a RU 2 x 6 cavity. b. The fenestration -factor column excludes skylights. The SHGC column applies to all glazed fenestration. U c. R-5 shall be added to the required slab edge values for heated slabs. R- d. The total -value may be achieved with a combination of cavity insulation and insulating sheathing that covers R 100% of the exterior wall. e. The wall insulation may be the sum of the two values where the first value is the cavity insulation and the second value is insulating sheathing. The combination of cavity insulation plus insulating sheathing may be used where structural sheathing covers not more than 25% of the exterior wall area and insulating sheathing is not required where structural sheathing is used. If structural sheathing covers more than 25% of exterior wall area then the wall insulation requirement may only be satisfied with the single insulation value. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature. Also data not applicable beyond North Central Texas area was eliminated.) TABLE 402.1.3 EQUIVALENT U-FACTORS *** Amend to read as follows: TABLE 402.1.3 a EQUIVALENT U-FACTORS MAX MAX GLAZED MAX CRAWL CLIMATE - AREA TO MAX MAX WOOD MASS MAX MAX SPACE SUB WALL GLAZED MAX MAX FRAME WALL FLOOR BASEMENT WALL U-U-U- CLIMATE AREA FENESTRATION SKYLIGHT CEILING WALL WALL U-FACTOR U-FACTOR U-FACTOR U-FACTORU-FACTOR ZONE RATIO FACTOR FACTOR FACTOR 15 0.60 0.65 0.034 0.082 0.124 0.047 0.179 0.075 20 0.54 0.65 0.030 0.082 0.124 0.047 0.179 0.075 3.2 25 0.51 0.65 0.030 0.071 0.112 0.047 0.179 0.075 30 0.46 0.65 0.030 0.071 0.112 0.047 0.179 0.075 a. Nonfenestration -factors shall be obtained from measurement, calculation or an approved source. U (Reason: This amendment is added to satisfy the “not less restrictive” requirement when adopting subsequent editions of energy codes in accordance th with Texas SB 5, 77 Legislature. Also data not applicable beyond North Central Texas area was eliminated.) ***Amend Section 402.3.2 Glazed fenestration SHGC. to read as follows: 402.3.2 Glazed fenestration SHGC. An area-weighted average of fenestration products more than 50 percent glazed shall be permitted to satisfy the SHGC Attachment B Page 13 of 16 2006 International Energy Conservation Code requirements. The maximum area-weighted average and the maximum SHGC shall not exceed 0.40. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature.) ***Section 402.3.3 Glazed fenestration exemption Amend to read as follows: 2 402.3.3 Glazed fenestration exemption. Up to 15 square feet (1.4 m) 1 percent of glazed fenestration per dwelling unit shall be permitted to be exempt from U-factor and SHGC requirements in Section 402.1. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature.) ***Section 402.3.5 Thermally isolated sunroom -factor Amend U. to read as follows: Section 402.3.5 Thermally isolated sunroom -factor. U For zones 4 through 8, the maximum fenestration U-factor shall be 0.50 and the maximum skylight U- factor shall be 0.75. New windows and doors separating the sunroom from conditioned space shall meet the building thermal envelope requirements. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when adopting subsequent editions of energy codes in accordance th with Texas SB 5, 77 Legislature.) *** Section 402.3.6 Replacement fenestration. Amendto read as follows: Section 402.3.6 Replacement fenestration. Where some or all of an existing fenestration unit is replaced with a new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor and SHGC in Table 402.1.1 402.3.7. Exceptions: 1. Replacement skylights shall have a maximum U-factor for 0.60 when installed in all sub climate zones except for 2.1. 2. For buildings constructed in conformance with an energy code as required th by State of Texas Senate Bill Number 5, 77 Legislature, replacement fenestration units may comply with the original construction documents or applicable U-factor in Table 402.1.1. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature and to provide for reasonable compliance for structures built after the th adoption of codes in accordance with SB 5, 77 Legislature.) Attachment B Page 14 of 16 2006 International Energy Conservation Code ***Add Section 402.3.7 Prescriptive path for additions. to read as follows: Section 402.3.7 Prescriptive path for additions. As an alternative for demonstrating compliance, additions with a conditioned floor area less than 500 square feet (46.5 m2) to existing single-family residential buildings and structures shall meet the prescriptive envelope component criteria in Table 402.3.7 for the sub climate zone applicable to the location. The U-factor of each individual fenestration product (windows, doors and skylights) shall be used to calculate and area-weighted average fenestration product U-factor for the addition, which shall not exceed the applicable listed values in Table 402.3.7. For additions, other than sunroom additions, the total area of fenestration products shall not exceed 40 percent of the gross wall and roof area of the addition. The R-values for opaque thermal envelope components shall be equal to or greater than the applicable listed values in Table 402.3.7. Conditioned sunroom additions shall maintain thermal isolation; shall not be used as kitchens or sleeping rooms. The combined solar heat gain coefficient (the area weighted average) of all glazed fenestration products used in additions and as replacement windows in accordance with this section shall not exceed 0.40. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature.) Table 402.3.7 PRESCRIPTIVE ENVELOPE COMPONENT CRITERIA ***Add ADDITIONS TO AND REPLACEMENT WINDOWS FOR EXISTING DETACHED ONE- AND TWO-FAMILY DWELLINGS to read as follows: Table 402.3.7 PRESCRIPTIVE ENVELOPE COMPONENT CRITERIA ADDITIONS TO AND REPLACEMENT WINDOWS FOR EXISTING DETACHED d ONE- AND TWO-FAMILY DWELLINGS MAXIMUM MINIMUM SUB Basement Slab Crawl CLIMATE Fenestration Ceiling Wall R-Floor R-wall perimeter R-space wall a, d d b c ZONES U-factor R-valuevaluevalue R-valuevalue R-value 2.1 0.75 R-26 R-13 R-11 R-5 R-0 R-5 2.2, 3.1, 3.2, 0.50 R-30 R-13 R-19 R-8 R-0 R-10 3.3 and 3.4 4 0.50 R-38 R-13 R-21 R-10 R-0 R-19 SEE TABLE FOOTNOTES NEXT PAGE: Attachment B Page 15 of 16 2006 International Energy Conservation Code a. “Ceiling -value” shall be required for flat or inclined (cathedral) ceilings. Floors over outside air shall meet R “Ceiling -value” requirements. R b. Basement wall insulation to be installed in accordance with Section 402.2.6. c. “Crawl space wall -value” shall apply to unventilated crawl spaces only. Crawl space insulation shall be R installed in accordance with Section 402.2.8. d. Sunroom additions shall be required to have a maximum fenestration U-factor of 0.5. in all sub climate zones except sub climate zone 2.1. In all sub climate zones, the minimum ceiling R-value for sunroom additions shall be R-19 and the minimum wall R-value shall be R-13. (Reason: This amendment is added to satisfy the “not less restrictive” requirement when th adopting subsequent editions of energy codes in accordance with Texas SB 5, 77 Legislature.) Exception No. 2. Section 403.2.1. Insulation ***Addtoto read as follows: Section 403.2.1. Insulation . Supply and return ducts shall be insulated to a minimum of R-8. Ducts in floor trusses shall be insulated to a minimum of R-6. Exceptions: 1. Ducts or portions thereof located completely inside the building thermal envelope. 2. Supply and return ducts can be insulated to a minimum of R-6, if the efficiency of the cooling equipment is upgraded to one SEER point above the NAECA (National Appliance Energy Conservation Act) Standard. (Reason: To provide an equivalent tradeoff to permit the use of R-6 duct insulation.) Section 501.3. Compliance software tools. ***Add to read as follows: Section 501.3. Compliance software tools. Software tools used to demonstrate energy code compliance that are deemed acceptable by the building official may only utilize the energy chapter of the 2006 International Energy Conservation Code or the 2004 Edition of AHSRAE 90.1 Energy Standard for Buildings Except Low-rise Residential Buildings when code edition and/or standard selection is available. (Reason: The nonresidential provisions of the 2006 IECC are deemed “not less th restrictive” in accordance with Texas SB 5, 77 Legislature.) Section 505.2.1 Interior Lighting Controls. to read as follows: **Amend 505.2.1 Interior lighting controls. Each area enclosed by walls or floor-to- ceiling partitions shall have at least one manual control for the lighting serving that area. The required controls shall be located within the area served by the controls or be a remote switch that identifies the lights served and their status. Each control device shall control a maximum of 2,500 square feet (232.26 square meters) of floor area for a space 10,000 square feet (929.03 square meters) or less and a maximum of 10,000 square feet (929.03 square meters) for a space greater than 10,000 square feet (929.03 square meters). (Reason: This change is consistent with energy conservation measures in ASHRAE 90.1 - 2004, Section 9.4.1.2 (b) Space Control.” This "zoning" is especially relevant for after-hours employees in office spaces.) END Attachment B Page 16 of 16 2006 International Energy Conservation Code