2010-112
sAour documents\ordinances\10\energy code ordinance 2009.doc
ORDINANCE NO. 2010-112
AN ORDINANCE OF THE CITY OF DENTON, TEXAS AMENDING CHAPTER 28 OF
THE CODE OF ORDINANCES TO ADOPT THE 2009 INTERNATIONAL ENERGY
CONSERVATION CODE, AS PUBLISHED BY THE INTERNATIONAL CODE COUNCIL,
AND TO ESTABLISH LOCAL AMENDMENTS THERETO; ESTABLISHING A PENALTY
OF A FINE NOT TO EXCEED $2,000.00 FOR VIOLATIONS HERETO; PROVIDING FOR
SEVERABILITY; REPEALING ALL ORDINANCES IN CONFLICT HEREWITH; AND
PROVIDING AN EFFECTIVE DATE.
SECTION 1. Chapter 28 of the Code or Ordinances of the City of Denton is hereby
amended by re-designating sections 28-253 through 28-295 as a new Article of said Chapter,
entitled "Energy Conservation Code", and amending existing sections 28-253 and 28-254 to
read as follows:
Sec. 28-253. Adoption of the energy conservation code.
The International Energy Conservation Code, 2009 edition as published by the International
Code Council is hereby adopted and designated as the energy conservation code for the city
subject to the deletions and amendments enumerated in section 28-254. A copy of this code
shall be maintained in the Office of the City Secretary and be available for public
inspection.
Sec. 28-254. Amendments to the 2009 International Energy Conservation Code
(1) SECTION 202 GENERAL DEFINITIONS is amended 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.
(2) SECTION 401.2 COMPLIANCE is amended to read as follows:
401.2 Compliance. As a minimum, projects shall comply with Sections 401, 402.4,
402.5, and 403.1, 403.2.2, 403.2.3, and 403.3 through 403.9 (referred to as the
mandatory provisions) and either:
1. Sections 402.1 through 402.3, 403.2.1 and 404.1 (prescriptive); or
2. Section 405 (performance); and
3. Demonstrate surpassing the minimum compliance of this code by 10% or
more.
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(3) SECTION 402.2.12. INSULATION INSTALLED IN WALLS is added to read as
follows:
Section 402.2.11. 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.
(4) SECTION 402.3.7 PRESCRIPTIVE PATH FOR ADDITIONS is added to read as
follows:
Section 402.3.7 Prescriptive path for additions. As an alternative for demonstrating
compliance, additions to existing single-family residential buildings and structures shall
meet the prescriptive envelope component criteria in Table 402.3.7. The U-factor of
each individual fenestration product (windows, doors and skylights) shall be used to
calculate an 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 and shall not be used as
kitchens or sleeping rooms.
In climate zone 3 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 0.30.
(5) Table 402.3.7 PRESCRIPTIVE ENVELOPE COMPONENT CRITERIA ADDITIONS
TO AND REPLACEMENT WINDOWS FOR EXISTING DETACHED ONE- AND
TWO-FAMILY DWELLINGS is added to read as follows:
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t s:\our documents\ordinances\10\energy code ordinance 2009.doc
Table 402.3.7 PRESCRIPTIVE ENVELOPE COMPONENT CRITERIA
ADDITIONS TO AND REPLACEMENT WINDOWS FOR EXISTING
DETACHED ONE- AND TWO-FAMILY DWELLINGSd
MAXIMUM MINIMUM
Crawl
space
Ceiling Wall Floor Basement Slab wall
CLIMATE Fenestration R- R- R- wall perimeter R-
ZONE U-factor value' value value R-value b R-value value`
3 0.45 R-38 R-13 R-19 R-8 R-0 R-10
a. "Ceiling R-value" shall be required for flat or inclined (cathedral) ceilings. Floors over outside air
shall meet "Ceiling R-value" requirements.
b. Basement wall insulation to be installed in accordance with Section 402.2.7.
C. "Crawl space wall R-value" shall apply to unventilated crawl spaces only. Crawl space insulation
shall be installed in accordance with Section 402.2.9.
d. Sunroom additions shall be required to have a maximum fenestration U-factor of 0.5. The minimum
ceiling R-value for sunroom additions shall be R-19 and the minimum wall R-value shall be R-13.
Secs. 28-255 28-295. Reserved:
SECTION 2. If any provision of this ordinance or the application thereof to any person
or circumstance is held invalid, such invalidity shall not affect other provision or application,
and to this end the provisions 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 July 1, 2010 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 J day of , 2010.
MARK BURROUGHS?MAYOR
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sAour documents\ordinances\10\energy code ordinance 2009.doc
ATTEST:
JENNIFER WALTERS, CITY SECRETARY
BY:
APPROVED AS TO LEGAL FORM:
ANITA BURGESS, CITY ATTORNEY
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BY: 1____ V--A- -e
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