St. Charles County, MO Energy Conservation Code

[Ord. No. 17-061 § 10, 7-5-2017; Ord. No. 23-102, 11-13-2023]

St. Charles County hereby adopts the 2021 St. Charles County Energy Conservation Code, a copy of which shall be deposited in the Office of the County Registrar with this ordinance, with the following amendments by additions, insertions, deletions and changes to read as follows:

(CHAPTER 1 [CE] SCOPE AND ADMINISTRATION)

(SECTION C101 SCOPE AND GENERAL REQUIREMENTS)

C101.1 Title. This code shall be known as the Energy Conservation Code of St. Charles County, Missouri, and shall be cited as such. It is referred to herein as "this code."

(SECTION C103 CONSTRUCTION DOCUMENTS)

C103.1 General. Construction documents and other data shall be submitted as required by the Code Official, with each application for a permit. The Code Official shall be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. Where special conditions exist, the Code Official is authorized to require necessary construction documents to be prepared by a registered design professional.

Exception: The Code Official shall have the authority to waive the submission of construction documents or other supporting data if the Code Official determines they are not necessary to confirm compliance with this code.

C103.1.2 Electronic submission. Where design documents, including, but not limited to, plot plans, site plans, design drawings, specifications, etc. are originally created electronically, the Building Official is authorized to require electronic submittal of documents in a portable document format (PDF) or similar format for review. Where design documents were originally prepared on paper and are submitted in a paper form, the Code Official is authorized to charge a fee for converting those drawings to PDF equal to the cost incurred by County staff recreating the document and not to exceed more than one dollar ($1.00) per page.

Exception: Where submittal documents were originally prepared by hand and are eleven (11) inches by seventeen (17) inches or less, the fee for document conversion shall not be charged.

(SECTION C109 STOP WORK ORDER)

C109.2 Issuance. The stop work order shall be in writing and shall be given to the owner of the property, the owner's authorized agent or the person performing the work. Upon issuance of a stop work order, the cited work shall immediately cease. The stop work order shall state the reason for the order and the conditions under which the cited work will is authorized to resume. Any person served with a stop work order shall pay an administrative penalty of up to two hundred fifty dollars ($250.00).

(SECTION C110 MEANS OF APPEALS)

C110.1 General. For the purposes of this code, all appeals shall be in accordance with the procedure established for the Building Code of St. Charles County, Missouri, in Section 113 of Section 500.100.

C110.2 Limitations on authority. Delete in its entirety.

C110.3 Qualifications. Delete in its entirety.

(CHAPTER 2 [CE] DEFINITIONS)

(SECTION C202 GENERAL DEFINITIONS)

RESIDENTIAL BUILDING. For this code, includes Group R-2, R-3, and R-4 buildings three (3) stories or less in height above grade

(CHAPTER 1 [RE] SCOPE AND ADMINISTRATION)

(SECTION R101 SCOPE AND GENERAL REQUIREMENTS)

R101.1 Title. This code shall be known as the Energy Conservation Code of St. Charles County, Missouri, and shall be cited as such. It is referred to herein as "this code."

(SECTION R103 CONSTRUCTION DOCUMENTS)

R103.1 General. Construction documents and other data shall be submitted as required by the Code Official, with each application for a permit. The Code Official shall be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. Where special conditions exist, the Code Official is authorized to require necessary construction documents to be prepared by a registered design professional.

R103.1.2 Electronic submission. Where design documents, including, but not limited to, plot plans, site plans, design drawings, specifications, etc. are originally created electronically, the Building Official is authorized to require electronic submittal of documents in a portable document format (PDF) or similar format for review. Where design documents were originally prepared on paper and are submitted in a paper form, the Code Official is authorized to charge a fee for converting those drawings to PDF equal to the cost incurred by County staff recreating the document and not to exceed more than one dollar ($1.00) per page.

Exception: Where submittal documents were originally prepared by hand and are eleven (11) inches by seventeen (17) inches or less, the fee for document conversion shall not be charged.

(SECTION R109 STOP WORK ORDER)

R109.2 Issuance. The stop work order shall be in writing and shall be given to the owner of the property, the owner's authorized agent or the person performing the work. Upon issuance of a stop work order, the cited work shall immediately cease. The stop work order shall state the reason for the order and the conditions under which the cited work will is authorized to resume. Any person served with a stop work order shall pay an administrative penalty of up to two hundred fifty dollars ($250.00).

(SECTION R110 MEANS OF APPEALS)

R110.1 General. For the purposes of this code, all appeals shall be in accordance with the procedure established for the Building Code of St. Charles County, Missouri, in Section 113 of 500.010.

R110.2 Limitations on authority. Delete in its entirety.

R110.3 Qualifications. Delete in its entirety.

(CHAPTER 2 [RE] DEFINITIONS)

(SECTION R202 GENERAL DEFINITIONS)

RESIDENTIAL BUILDING. For this code, includes Group R-2, R-3, and R-4 buildings three (3) stories or less in height above grade.

(CHAPTER 4 [RE] RESIDENTIAL ENERGY EFFICIENCY)

(SECTION R402 BUILDING THERMAL ENVELOPE)

Replace Table R402.1.3 entitled "Insulation Minimum R-Values And Fenestration Requirements By Component" with the table provided below:

TABLE R402.1.3
INSULATION MINIMUM R-VALUES AND FENESTRATION REQUIREMENTS BY COMPONENT^a
CLIMATE ZONE	FENESTRATION U-FACTOR^b,i	SKYLIGHT^b U-FACTOR	GLAZED FENESTRATION SHGC^b,e	CEILING R-VALUE	WOOD FRAME WALL R-VALUE^g	MASS WALL R-VALUE^h	FLOOR R-VALUE	BASEMENT^c,g WALL R-VALUE	SLAB^d R-VALUE & DEPTH	CRAWL SPACE^c,g WALL R-VALUE
4A	.35	.60	NR	38	13	5/10	19	10ci or 13^j	10, 2 ft	10/13

For SI: 1 foot = 304.8 mm.
NR = Not Required.
ci = continuous insulation.
a.	R-values are minimums. U-factors and SHGC are maximums. Where insulation is installed in a cavity that is less than the label or design thickness of the insulation, the installed R-value of the insulation shall be not less than the R-value specified in the table.
b.	The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
	Exception: In Climate Zones 0 through 3, skylights shall be permitted to be excluded from glazed fenestration SHGC requirements provided that the SHGC for such skylights does not exceed 0.30.
c.	"5ci or 13" means R-5 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the interior side of the wall. "10ci or 13" means R-10 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the interior side of the wall. "15ci or 19 or 13 & 5ci" means R-15 continuous insulation (ci) on the interior or exterior surface of the wall; or R-19 cavity insulation on the interior side of the wall; or R-13 cavity insulation on the interior of the wall in addition to R-5 continuous insulation on the interior or exterior surface of the wall.
d.	R-5 insulation shall be provided under the full slab area of a heated slab in addition to the required slab edge insulation R-value for slabs. as indicated in the table. The slab-edge insulation for heated slabs shall not be required to extend below the slab.
e.	There are no SHGC requirements in the Marine Zone.
f.	Basement wall insulation is not required in Warm Humid locations as defined by Figure R301.1 and Table R301.1.
g.	The first value is cavity insulation; the second value is continuous insulation. Therefore, as an example, "13 & 5" means R-13 cavity insulation plus R-5 continuous insulation.
h.	Mass walls shall be in accordance with Section R402.2.5. The second R-value applies where more than half of the insulation is on the interior of the mass wall.
i.	A maximum U-factor of 0.32 shall apply in Climate Zones 3 through 8 to vertical fenestration products installed in buildings located either:
	1.	Above four thousand (4,000) feet in elevation; or
	2.	In windborne debris regions where protection of openings is required by Section R301.2.1.2 of the International Residential Code.
j.	Exception: Unfinished basements may have up to a maximum of twenty percent (20%) of the total basement wall area exposed above the outside finished grade/ground level as uninsulated concrete foundation walls. The foundation wall area above the outside grade/ground level that may be uninsulated is determined by the formula [.20 times the basement wall height of all walls (including insulated exterior frame walls for walkout basements and walls common to both basement and attached garages) times the perimeter of these basement walls]. In unfinished areas, the basement foundation wall insulation shall extend down to the basement floor slab or to a minimum of twenty-four (24) inches below outside finished grade when the grade is above the floor slab elevation.