2006-040
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ORDINANCE NO. d OOb - (}I/j)
AN ORDINANCE OF THE CITY OF DENTON, TEXAS AMENDING SECTION 28-
27 OF THE CODE OF ORDINANCES TO PROVIDE FOR THE ADOPTION OF THE
2003 INTERNATIONAL ENERGY CONSERVATION CODE, ALL PUBLISHED BY
THE INTERNAIONAL CODE COUNCIL; PROVIDING FOR AMENDMENTS
THERETO; PROVIDING FOR A PENALTY FOR VIOLATION OF A FINE NOT TO
EXCEED $500.00; PROVIDING FOR A SEVERABILITY CLAUSE; REPEALING
ALL ORDINANCES IN CONFLICT THEREWITH; AND PROVIDING FOR AN
EFFECTNE DATE.
THE COUNCIL OF THE CITY OF DENTON HEREBY ORDAINS:
SECTION I. That Chapter 28, Section 28-253 of the Code or Ordinances of the
City of Denton is hereby added so that said section shall hereafter be and read as follows:
Adoption of the energy conservation code. The International Energy Conservation Code,
2003 edition as published by the International Code Council, a copy which shall be filed
in the Office of the City Secretary and available for public inspection, is hereby adopted
and designated as the energy conservation code for the city, the same as though the
edition of such code were copied at length herein subject to the deletions and
amendments enumerated in section 28-254.
Section 28-28 is hereby amended to read as follows:
Amendments to the 2003 International Energy Conservation
Code
(1) Section 101.4.1; add a second paragraph as follows:
Regardless of compliance with other sections of this code. all residentiai construction must show
compliance with this code by submitting a report from a recognized energy code compliance
program equal to the Department of Energy RES-check compliance program. Compliance as
determined by RES-check shall be a minimum of 10% above the 2003 IECC.
(2) Add the following section:
101.4.1.3 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.
(3) Section 302.1; Replace blank Table 302.1 Exterior Design Conditions with the following:
CONDITION VALUE
Winter a, desiqn dry-bulb tF) (99.6% 17
Summer', desiqn dry-bulb ("F) (0.4% 100
Summer a, desiqn wet-bulb (OF) (0.4% 78
Degree davs heatina 0 2407
Deqree days coolina ' 2603
Climate zone C 58
-Delete note "a" and replace with the following:
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a. These values are from ASHRAE Handbook of Fundamentals for Dallas/Ft. Worth International
Airport 99.6% Winter DB, 0.4% Summer DB, and 0.4% Summer WB; and from Local
Climatological Data for Dallas-Ft. Worth published by the National Climatic Data Center, National
Oceanic and Atmospheric Administration. These values are for the purpose of providing a
uniform basis of requirements for North Central Texas. This will not preclude licensed
professionals from submitting design analyses based on site measurements or published data
more specific to the building site. Adjustments shall be permitted to reflect local climates which
differ from the tabulated values, or local weather experience determined by the code official.
(4) Add the following section: Section 303 City of Denton Minimum Requirements for
Residential Compliance
1. Glazing R-value 1.66
2. Attic Insuiation R-value 38
3. Cathedral Ceiling with no attic R-value 19
4. Walllnsulation R-value 13
5. Floor Insulation R-value 19
6. Basement Wall R-value 7
7. Slab Perimeter R-value 0
8. Crawlspace Wall R-value 13
9. SEER Rating SEER - 13
10. Pass the RES-check Compliance Report by a minimum of 10%
U-factor 0.600
U-factor 0.026
U-factor 0.052
U-factor 0.077
U-factor 0.052
U-factor 0.142
U-factor 0.000
U-factor 0.077
(5) Section 502.1.1; delete exception #2 and substitute the following:
2. Buildings located in Climate Zones 5b.
(6) Section 502.1.5; add the following exceptions:
Exceptions:
1. Any glazing facing within 45 degrees of true north;
2. Any glazing facing within 45 degrees of true south which is shaded along its full width by
a permanent overhang with a projection factor of 0.3 or greater.
3. Any fenestration with permanently attached screens where the screens have a rated
shading coefficient of .6 or less.
(7) Section 502.2; Replace blank Table 502.2 Heating & Cooling Criteria with the following:
Table 502.28,0
HEATING AND COOLING CRITERIA
Element Mode Detached One-Family Detached Two-Family
Dwellings Dwellings
Uo Uo
Walls HeatinQ or coolinQ 0.077 0.077
Roof/ceilinQ HeatinQ or coolinQ 0.026 0.026
Floors over unheated Heating or cooling 0.052 0.052
spaces
Heated slab on Qrade HeatinQ R-value - 6 R-value - 6
Unheated slab on Heating R-value - 0 R-value - 0
Qrade
Basement wall HeatinQ or coolinQ U-factor - 0.142 U-factor - 0.142
Crawl space wall Heatina or coolina U-factor - 0.077 U-factor = 0.077
-Delete Note "a" and replace with the following:
a. The above values have been determined for the City of Denton.
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"Add Note "go:
g. These requirements apply only to the boundaries of conditioned space. Air conditioning
equipment and ductwork is recommended, but not required, to be located within the conditioned
space in North Central Texas zones.
"Delete Figures 502.2(1-6)
(8) Section 502.2; Add note to Fig 502.2(7):
All counties within the North Central Texas Council of Governments region are designated as
within the area of very heavy termite infestation probability for purpose of uniform interpretation of
this requirement.
(9) Section 502.2.2; add a second paragraph as follows:
A building demonstrating envelope compliance at least 10% better than code may utilize R6 duct
insulation in both supply and return air ducts in lieu of the insulation required by Table 503.3.3.3.
(10) Section 502.2.4; Delete prescriptive Tables 502.2.4(1-9) and substitute the following:
"Replace Tables 502.2.4 (1-6) with:
Table 502.2.4(1)
Prescriptive Building Envelope Requirements, Detached One-Family Dwellings, Based on
Window Area as a Percent of Gross Exterior Wall Area
% Maximum Minimum
GlazIng Glazing Ceiling Cathedral Exterior Floor Basement Slab Crawl
U-factor R-value Ceiling wall R-value wall perimeter space
with no R-value R-value R-value wall
attic and depth R-value
<8% 0.60 R-38 R-19 R-13 R-19 R-7 R-O R-13
<12% 0.60 R-38 R-19 R-13 R-19 R-7 R-O R-13
<15% 0.60 R-38 R-19 R-13 R-19 R-7 R-O R-13
<18% 0.52 R-38 R-19 R-13 R-19 R-7 R-O R-13
<20% 0.50 R-38 R-19 R-13 R-19 R-7 R-O R-13
<25% 0.46 R-38 R-19 R-16 R-19 R-7 R-O R-13
. See Section 101.4.1
. All HVAC Equipment Must Meet a Minimum of SEER 13
(11) Replace Tables 502.2.4 (7-9) with:
Table 502.2.4(2)
Prescriptive Building Envelope Requirements, Detached Two-Family Dwellings, Based on
Window Area as a Percent of Gross Exterior Wall Area
% Maximum Minimum
Glazing Glazing Ceiling Cathedral ExterIor Floor Basement Slab Crawl
U-factor R-value Ceiling wall R-value wall perimeter space
with no R-value R-value R-value wall
attic and depth R-value
<20% 0.55 R-38 R-19 R-13 R-19 R-7 R-O R-13
<25% 0.55 R-38 R-19 R-13 R-19 R-7 R-O R-13
<30% 0.47 R-38 R-19 R-13 R-19 R-7 R-O R-13
. See Section 101.4.1
. All HVAC Equipment Must Meet a Minimum of SEER 13
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(12) Table 503.3.3.1 MINIMUM PIPE INSULA TlON. Amend footnote "a" to read as follows:
a. For piping lengths in excess of five (5) feet exposed to outdoor air, increase the insulation
thickness by 0.5 inch.
(13) Table 503.3.3.3; add footnote "e" as follows:
e. See Section 502.2.2
(14) Section 503.3.3.4.3; change first sentence to read as follows:
503.3.3.4.3 Sealing required. All joints, longitudinal and transverse seams, and connections in
ductwork, shall be made substantially airtight by means of welds, gaskets, mastics (adhesives),
mastic-plus-em bedded-fabric systems or tapes or other approved closure systems. (Remainder
to remain unchanged)
(15) Section 602.1.6; delete last sentence of exception.
(16) Section 602.2 Maximum solar heat gain coefficient for fenestration products. Add the
following exceptions:
Exceptions:
1. Any glazing facing within 45 degrees of true north;
2. Any glazing facing within 45 degrees of true south which is shaded along its full width by
a permanent overhang with a projection factor of 0.3 or greater.
3. Any fenestration with attached screens where the screens have a rated shading
coefficient of .6 or less.
(17) Section 802.2; Replace blank tables 802.2 (1-4) with the completed tables provided on
the following four pages. Delete tables 802.2 (5-37).
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TABLE 802.2(1)
BUILDING ENVELOPE REQUIREMENTS
WINDOW AND GLAZED DOOR AREA 10 PERCENT OR LESS OF ABOVE-GRADE WALL
AREA
ELEMENT CONDITIONNALUE
SkViiiJhts TU-factorl 1
Slab or below-:Qrade walllR-valuel R-O
Windows and glass doors SHGC U-factor
PF < 0.25 Anv Anv
0.25 < PF < 0.50 Anv Anv
PF > 0.50 Anv Anv
Roof assemblies (R-value) Insulation between Continuous Insulation
framin~
All-wood joist/truss R-19 R-16
Metal joist/truss R-25 R-17
Concrete slab or deck NA R-16
Metal purlin with thermal block R-25 R-17
Metal purlin without thermal block X R-17
Floors over outdoor air or Insulation between Continuous Insulation
unconditioned space (R-value) framlno
All-wood joist/truss R-11 R-6
Metal joist/truss R-11 R-6
Concrete slab or deck NA R-6
Aboveo<Jrade walls IR-valuel No framlno Metal framlno Wood framlno
Framed
R-value cavilV NA R-11 R-11
R-value continuous NA R-O R-O
CMU, > 8 in., with intenral insulation
R-value cavitv NA R-O R-O
R-value continuous R-O R-O R-O
Other masoilrV walls
R-value cavrtV NA R-O R-O
R-value continuous R-O R-O R-O
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TABLE 802.2(2)
BUILDING ENVELOPE REQUIREMENTS
WINDOW AND GLAZED DOOR AREA OVER 10 PERCENT BUT NOT GREATER THAN 25
PERCENT OF ABOVE-GRADE WALL AREA
ELEMENT CONDITIONNALUE
Skvliahts I U-factorl 1
Slab or belowo<Jrade walllR-valuel R-O
Windows and glass doors SHGC U-factor
PF < 0.25 0.6 Anv
0.25 < PF < 0.50 0.7 Anv
PF > 0.50 Anv Anv
Roof assemblies (R-value) Insulation between Continuous insulation
framing
All-wood joist/truss R-25 R-19
Metal joist/truss R-25 R-20
Concrete slab or deck NA R-19
Metal purlin with thermal block R-30 R-20
Metal purlin without thermal block X R-20
Floors over outdoor air or Insulation between Continuous insulation
unconditioned space (R-value) framing
All-wood joist/truss R-11 R-6
Metal joist/truss R-11 R-6
Concrete slab or deck NA R-6
Above-grade walls IR-valuel No framing Metal framina Wood framina
Framed
R-value cavity NA R-11 R-11
R-value continuous NA R-O R-O
CMU, > 8 in., with inteqral insulation
R-value cavity NA R-11 R-11
R-value continuous R-5 R-O R-O
Other masonrY walls
R-value cavity NA R-11 R-11
R-value continuous R-5 R-O R-O
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TABLE 802.2(3)
BUILDING ENVELOPE REQUIREMENTS
WINDOW AND GLAZED DOOR AREA OVER 25 PERCENT BUT NOT GREATER THAN 40
PERCENT OF ABOVE-GRADE WALL AREA
ELEMENT CONDITIONNALUE
Skvliohts I U-factor\ 1
Slab or below-(lrade wall (R-valuel R-O
Windows and glass doors SHGC U-factor
PF < 0.25 0.4 0.7
0.25 < PF < 0.50 05 0.7
PF > 0.50 0.6 0.7
Roof assemblies (R-value) Insulation between Continuous insulation
framing
All-wood joisUtruss R-25 R-19
Metal joisUtruss R-25 R-20
Concrete slab or deck NA R-19
Metal purlin with thermal block R-30 R-20
Metal purlin without thermal block X R-20
Floors over outdoor air or Insulation between Continuous insulation
unconditioned space (R-value) framing
All-wood joisUtruss R-11 R-6
Metal joisUtruss R-11 R-6
Concrete slab or deck NA R-6
Above-(lrade walls (R-valuel No framing Metal framlna Wood framing
Framed
R-value cavity NA R-11 R-11
R-value continuous NA R-O R-O
CMU, > 8 in., with inteoral insulation
R-value cavity NA R-11 R-11
R-value continuous R-5 R-O R-O
Other masonrY walls
R-value cavity NA R-11 R-11
R-value continuous R-5 R-O R-O
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TABLE 802.2(4)
BUILDING ENVELOPE REQUIREMENTS
WINDOW AND GLAZED DOOR AREA OVER 40 PERCENT BUT NOT GREATER THAN 50
PERCENT OF ABOVE-GRADE WALL AREA
ELEMENT CONDITIONNALUE
Skvllahts IU-factorl 1
Slab or below-(lrade walllR-valuel R-O
Windows and glass doors SHGC U-factor
PF < 0.25 0.4 0.7
0.25 < PF < 0.50 0.5 0.7
PF > 0.50 0.6 0.7
Roof assemblies (R-value) Insulation between Continuous Insulation
framlnll
All-wood joist/truss R-25 R-19
Metal joist/truss R-25 R-20
Concrete slab or deck NA R-19
Metal purlin with thermal block R-30 R-20
Metal purlin without thermal block R-38 R-20
Floors over outdoor air or Insulation between Continuous Insulation
unconditioned space (R-value) framinll
All-wood joist/truss R-11 R-6
Metal joist/truss R-11 R-6
Concrete slab or deck NA R-6
Above-(lrade walls IR-valuel No framlnll Metal framino Wood framlnll
Framed
R-value cavitv NA R-13 R-11
R-value continuous NA R-3 R-O
CMU, > 8 in., with inteqral insulation
R-value cavitv NA, NA R-11 R-11
R-value continuous R-5 R-O R-O
Other masonrv walls
R-value cavitv NA R-11 R-11
R-value continuous R-5 R-O R-O
(18) Add footnote "f" to SHGC column heading in Tables 802.2 (2), 802.2 (3) and 802.2 (4)
to read as follows:
f. Minimum SHGC requirements do not apply to glazing as follows:
1. Any glazing facing within 45 degrees of true north.
2. Any glazing facing within 45 degrees of true south which is shaded along its
full width by a permanent overhang with a projection factor of 0.30 or greater.
3. Any glazing with permanent attached screens where the screens have a rated
shading coefficient of 0.60 or less.
(19) Section 805.2.1 Interior Lighting Controls; add a third sentence to read:
Large spaces shall have a separate switch or control for each 2500 square feet of floor area.
(20) Delete Figures 902.1 (1-43,45-51).
(21) Chapter 10; Replace referenced standard as follows:
ASHRAE 90.1-2001 Energy Standard for Buildings Except Low-Rise Residential
Buildings
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ASHRAE/IES -- 99
Energy Efficient Design of New Buildings Except Low-Rise Residential
Buildings -- 1999 Edition
Chapter 10 - Referenced Standards: Under the heading ASHRAE and IESNA, change the
Standard Reference Number from 90.1-2001 to 90.1-1999.
END
SECTION 2. That if any provision of this ordinance or the application thereof to
any person or circumstances is held invalid, such invalidity shall not affect other
provision or applications, and to this end the provision of this ordinance are severable.
SECTION 3. That all provisions of the ordinances of the City of Denton in
conflict with the provision of this ordinance are hereby repealed, and all other provisions
of the ordinances of the City or Denton, not in conflict with the provision of this
ordinance, shall remain in full force and effect.
SECTION 4. That any person violating any provision of this ordinance shall,
upon conviction, be fined a sum not to exceed two thousand dollars ($2,000.00). Each
day that a provision of this Ordinance is violated shall constitute a separate and distinct
offence.
SECTION 5. That this ordinance shall become effective fourteen (14) days form
the date of its passage, and the City secretary is hereby directed to cause the caption of
this ordinance to be published twice in the Denton Record Chronicle, the official
newspaper of the City of Denton, Texas, within ten (10) days of the date of its passage.
PASSED AND APPROVED this the 7i:1i day of lJph~
2006.
~~~
EULINE BROCK, MAYOR
ATTEST:
JENNIFER WALTERS, CITY SECRETARY
B~~~~n~~
APPRO D AS 0 LEGAL FORM:
EDWIN M. SNYDER, CITY ATTORNEY
BY:
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