Item 4J
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
February 4, 2008
TO:
Shana Yelverton, City Manager
FROM:
Paul Ward, CBO, Building Official
SUBJECT
: Ordinance No. 932, 1st Reading, adopt the 2006 International Energy
Conservation Code. (if approved at first reading, the public hearing will be
held March 4, 2008)
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.
Highlights of the proposed ordinances you may wish to include in the Council Memo
are as follows:
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