CALGreen · California Green Building Standards Code (CALGreen)

What are the fenestration and building-envelope installation requirements?

Q: Can I use urea formaldehyde foam anywhere?

No. Urea formaldehyde foam may be used only in exterior side walls and only if a 4‑mil polyethylene (or equivalent) vapor barrier is installed between the foam and interior space, per § A6.205.3.2 .

Q: What labeling do inspectors expect on fenestration?

A temporary label (or label certificate for site‑built/CMA) that lists certified U‑factor and SHGC must remain until inspection; permanent labeling is required when NFRC ratings are used, per § A6.205.1.1.4 .

Q: Do I have to seal every small penetration?

Yes — § A6.205.2 requires that joints and other openings that are potential sources of air leakage be caulked, gasketed, weatherstripped or otherwise sealed to limit infiltration/exfiltration.

CALGreen requires windows, glazed doors and exterior doors to meet thermal ratings and air‑leakage limits (or demonstrate compliance for site‑built/field‑fabricated units), carry required labels, and be sealed and weatherstripped at installation; insulation products must be certified and urea‑formaldehyde foam is tightly restricted and must include a vapor barrier.

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

The California Green Building Standards Code requires that fenestration (windows, glazed doors, skylights) and exterior doors be certified or demonstrated to meet thermal and air‑leakage performance, be properly labeled, and — when field‑fabricated or site‑built — be installed with continuous seals and weatherstripping. These requirements are controlled primarily by § A6.205.1, § A6.205.2, and § A6.205.3.

The single most important rule: seal the envelope. Fenestration, doors and all joints that can leak air must be tested/certified where required and physically caulked, gasketed, weatherstripped or otherwise sealed at installation.

Requirements in detail

Key defined terms (first use)

Fenestration — windows, glazed doors, skylights and other glazed assemblies (see § A6.205.1).
Field‑fabricated — fenestration or exterior doors built or assembled on site rather than factory‑rated; special installation and documentation rules apply in § A6.205.1.2.
U‑factor, SHGC, VT — thermal and optical ratings used to document fenestration performance; ratings must be NFRC‑rated or use the code default tables referenced in § A6.205.1.
Air leakage — maximum allowable infiltration rates for manufactured fenestration and doors (see § A6.205.1.1.1).

Summary table — decision‑relevant values

Feature	Requirement / threshold (decision value)	Code Reference
Air leakage (manufactured products)	≤ 0.3 cfm/ft² of window area; ≤ 0.3 cfm/ft² of door area for residential and nonresidential single doors; 1.0 cfm/ft² for nonresidential double swinging doors — tested per NFRC‑400 or ASTM E283 @ 75 Pa.	§ A6.205.1.1.1
U‑factor / SHGC / VT	Must be NFRC‑rated or use the default tables (code provides default U‑factors/SHGC values by frame/product).	§ A6.205.1.1.2–.4 and Table A6.205.1‑A/B (defaults)
Field‑fabricated fenestration installation	Must show compliance using the code U‑factors and SHGC values; shall be caulked to the building and shall be weatherstripped at the product‑to‑building interface.	§ A6.205.1.2
Labeling	Temporary label (or label certificate for site‑built) not removed before inspection; permanent label when NFRC rated or when required by procedure.	§ A6.205.1.1.4
Joints and other openings	All envelope joints/openings that can leak air must be caulked, gasketed, weatherstripped or otherwise sealed to limit infiltration/exfiltration.	§ A6.205.2
Insulation certification	Insulation products must be certified by the Department of Consumer Affairs, Bureau of Household Goods and Services per Title 24, Part 12 standards.	§ A6.205.3.1
Urea formaldehyde foam insulation	Only permitted in exterior side walls and only if a 4‑mil polyethylene (or equivalent) vapor barrier is installed between the foam and the interior.	§ A6.205.3.2
Flame spread / smoke	Insulating materials must meet flame spread and smoke density requirements of Title 24, Part 2 (California Building Code).	§ A6.205.3.3
Attic (existing building) insulation targets	Additions to attic insulation (existing) must result in R‑38 total in climate zones 1 and 16; R‑30 total in all other climate zones (unless space cannot accommodate).	§ A6.205.3.4.1

Fenestration certification, labeling and acceptance

Manufactured fenestration and exterior doors (not field‑fabricated) must be certified to the California Energy Commission or by an approved independent certifier that the product meets the subsection requirements (air leakage, U‑factor, SHGC, VT). § A6.205.1.1 covers these certification requirements.
Products must carry a temporary label (or label certificate for site‑built) that remains until inspection; permanent labels are required if NFRC procedures are used. § A6.205.1.1.4.
Site‑built fenestration in nonresidential buildings must meet acceptance testing/certification before occupancy (Certificate of Acceptance). § A6.205.1.1.5.

Installation and sealing details

Field‑fabricated fenestration and exterior doors: installation is allowed only when compliance documentation demonstrates the installation meets the code U‑factor and SHGC requirements; these installations must be caulked to the building and weatherstripped at the product interface. Exception: unframed glass doors and fire doors need not be caulked or weatherstripped. § A6.205.1.2.
Joints and openings: all joints and openings in the building envelope that are potential air leakage sources shall be caulked, gasketed, weatherstripped or otherwise sealed. This is an explicit mandatory installation requirement — § A6.205.2.

Insulation and roofing product rules

Insulation products must be certified for conductive thermal performance by the Department of Consumer Affairs as described in § A6.205.3.1.
Urea formaldehyde foam has narrow permitted use: exterior side walls only, and a 4‑mil plastic polyethylene (or equivalent) vapor barrier must be installed between the foam and the interior space. § A6.205.3.2.
Insulation installation must comply with flame spread and smoke density requirements in the California Building Code. § A6.205.3.3.
When installing insulation in existing attics, the total R‑value after work must meet the climate‑zone targets (R‑38 in CZ 1 & 16; R‑30 other zones) per § A6.205.3.4.1.

Exceptions & special cases

Field‑fabricated products are excepted from the manufacturer certification/air‑leakage labeling pathway but must still demonstrate compliance using the code U‑factors/SHGC and be sealed and weatherstripped at installation; see § A6.205.1.2.
Unframed glass doors and fire doors are excepted from the caulking and weatherstripping requirement in § A6.205.1.2.
Skylights and some site‑built fenestration have special default calculation exceptions for U‑factor/SHGC/VT if the skylight area is small or if the project meets certain nonresidential exceptions—see the Energy Code cross‑references incorporated into § A6.205.1.
Pet doors are explicitly required to meet the 0.3 cfm/ft² air leakage when tested like other fenestration (note in NFRC/ASTM testing notes). § A6.205.1.1.1.

Common mistakes

Assuming “field‑fabricated” means “no requirement” — field‑fabricated units still must demonstrate compliance using the code U and SHGC tables and must be sealed and weatherstripped per § A6.205.1.2.
Failing to leave the temporary label in place until inspection or not providing the required label certificate for site‑built fenestration; required by § A6.205.1.1.4.
Not sealing all penetrations and joints (pipes, ducts, wiring, framing gaps) — § A6.205.2 requires caulking/gasketing/weatherstripping of potential leakage points.
Installing urea formaldehyde foam without the required 4‑mil vapor barrier or using it in prohibited locations (it is limited to exterior side walls only). § A6.205.3.2.
Using insulating materials that don’t meet the required flame spread / smoke density rules from the California Building Code — check § A6.205.3.3.

Worked example — field‑fabricated storefront window (concrete numbers)

Scenario: You are installing a field‑fabricated, fixed glazed storefront window assembly, total glazed area 40 ft², in a nonresidential building.

Step 1 — Thermal documentation: Because it is field‑fabricated, you must demonstrate compliance for the installation using the code U‑factors and SHGC values (use the code default tables or NFRC ratings if available). See § A6.205.1.2.

Step 2 — Sealing at installation: The installed assembly shall be caulked between the fenestration product and the building and shall be weatherstripped where required by the code. Install continuous perimeter sealant; backer rod where joint depth requires. This is mandatory per § A6.205.1.2 and the general envelope sealing requirement § A6.205.2.

Step 3 — If the product were a manufactured unit instead: you would also need manufacturer certification that the unit meets the ≤ 0.3 cfm/ft² window air‑leakage criteria (tested per NFRC‑400 or ASTM E283 at 75 Pa) and carry the temporary label until inspection — § A6.205.1.1.1 and § A6.205.1.1.4.

Step 4 — Insulation / adjacent assembly: If you add insulation around the head/sill/ jamb, confirm the insulation product is certified per § A6.205.3.1 and that any flame‑spread limitations are respected per § A6.205.3.3.

Result: With documentation showing code U/SHGC compliance, continuous perimeter caulking and weatherstripping, labels/certificates as required, and compliant insulation materials, the installation will meet the building‑envelope provisions of § A6.205.1–A6.205.3.

Related provisions

§ A6.205.1.1 — Certification and air‑leakage limits for manufactured fenestration and doors.
§ A6.205.1.2 — Installation and sealing requirements for field‑fabricated fenestration and exterior doors.
§ A6.205.2 — Sealing of joints and other openings in the building envelope.
§ A6.205.3.1–.4 — Insulation product certification, urea formaldehyde restrictions, flame spread, and attic insulation in existing buildings.
§ A6.204.4.4 — Functional performance testing / commissioning items that verify correct installation of envelope components (useful for compliance verification).

Code references

Grounded in the retrieved California Green Building Standards Code (CALGreen) — click a citation to read the verbatim passage:

CALGreen § 205.1.2 High relevance — show source text
A6.205.1.2 Installation of field-fabricated fenestration and exterior doors. Field-fabricated fenestration and field-fabricated exterior doors may be installed only if the compliance documentation has demonstrated compliance for the installation using U factors from Table A6.205.1-A and SHGC values from Table A6.205.1-B. Field-fabricated fenestration and field-fabricated exterior doors shall be caulked between the fenestration products or exterior door and the building and shall be weatherstripped.

Exception: Unframed glass doors and fire doors need not be weatherstripped or caulked.

A6.205.2 Joints and other openings. Joints and other openings in the building envelope that are potential sources of air leakage shall be caulked, gasketed, weatherstripped or otherwise sealed to limit infiltration and exfiltration.

A6.205.3 Insulation and roofing products.

A6.205.3.1 Certification by manufacturers. Any insulation shall be certified by Department of Consumer Affairs, Bureau of Household Good and Services that the insulation conductive thermal performance is approved pursuant to the California Code of Regulations, Title 24, Part 12, Chapters 12-13, Article 3,“Standards for Insulating Material.”

A6.205.3.2 Installation of urea formaldehyde foam insulation. Urea formaldehyde foam insulation may be applied or installed only if:
1. It is installed in exterior side walls; and
2. A four-mil-thick plastic polyethylene vapor barrier or equivalent plastic sheathing vapor barrier is installed between the urea formaldehyde foam insulation and the interior space in all applications.
A6.205.3.3 Flame spread rating. All insulating material shall be installed in compliance with the flame spread rating and smoke density requirements of the Title 24, Part 2, California Building Code.

A6.205.3.4 Installation of insulation in existing buildings. Insulation installed in an existing attic or on an existing duct or water heater, shall comply with the applicable requirements of Subsections A6.205.3.4.1, A6.205.3.4.2 and A6.205.3.4.3 below. If a contractor installs the insulation, the contractor shall certify to the customer, in writing, that the insulation meets the applicable requirements of Subsections A6.205.3.4.1, A6.205.3.4.2 and A6.205.3.4.3 below.

A6.205.3.4.1 Attics. If insulation is installed in the existing attic of a low-rise residential building, the R-value of the total amount of insulation (after addition of insulation to the amount, if any, already in the attic) shall be at least R-38 in climate zones 1 and 16; and R-30 in all other climate zones.

Exception: Where the accessible space in the attic is not large enough to accommodate the required R-value, the entire accessible space shall be filled with insulation provided such installation does not violate Section 1203.2 of Title 24, Part 2, California Building Code.
CALGreen § 205.1.1.4 High relevance — show source text
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

A6.205.1.1.4 Labeling. Fenestration products shall:
1. Have a temporary label (or label certificate for site- built fenestration) meeting the requirements of Section 10111(a)1 of Title 24, Part 1 not to be removed before inspection by the enforcement agency, listing the certified U factor and SHGC and certifying that the air leakage requirements of Section A6.205.1.1.1 are met for each product line; and
2. Have a permanent label (or label certificate for site-built fenestration) meeting the requirements of Section 10111(a)2 of Title 24, Part 1 if the product is rated using NFRC procedures.
A6.205.1.1.5 Fenestration acceptance requirements. Before an occupancy permit is granted, site-built fenestration products in other than low-rise residential buildings shall be certified as meeting the Acceptance Requirements for Code Compliance, as specified by the Reference Nonresidential Appendix NA7 of the California Energy Commission 2008 Building Energy Efficiency Standards for Residential and Nonresidential Buildings to ensure that site-built fenestration meet Standards requirements, including a matching label certificate for each product installed and be readily accessible at the project location. A Certificate of Acceptance shall be submitted to the enforcement agency that certifies that the fenestration product meets the acceptance requirements.

Exception: Fenestration products removed and reinstalled as part of a building alteration or addition.

A6.205.1.2 Installation of field-fabricated fenestration and exterior doors. Field-fabricated fenestration and field-fabricated exterior doors may be installed only if the compliance documentation has demonstrated compliance for the installation using U factors from Table A6.205.1-A and SHGC values from Table A6.205.1-B. Field-fabricated fenestration and field-fabricated exterior doors shall be caulked between the fenestration products or exterior door and the building and shall be weatherstripped.

Exception: Unframed glass doors and fire doors need not be weatherstripped or caulked.

A6.205.2 Joints and other openings. Joints and other openings in the building envelope that are potential sources of air leakage shall be caulked, gasketed, weatherstripped or otherwise sealed to limit infiltration and exfiltration.

A6.205.3 Insulation and roofing products.

A6.205.3.1 Certification by manufacturers. Any insulation shall be certified by Department of Consumer Affairs, Bureau of Household Good and Services that the insulation conductive thermal performance is approved pursuant to the California Code of Regulations, Title 24, Part 12, Chapters 12-13, Article 3,“Standards for Insulating Material.”

A6.205.3.2 Installation of urea formaldehyde foam insulation. Urea formaldehyde foam insulation may be applied or installed only if:
1. It is installed in exterior side walls; and
2. A four-mil-thick plastic polyethylene vapor barrier or equivalent plastic sheathing vapor barrier is installed between the urea formaldehyde foam insulation and the interior space in all applications.

CALGreen § 106.11. High relevance — show source text

**Locate orient and shade the building as
required in Section A6.106.11.||||| |SECTION A6.205 Building Envelope||||| |A6.205.1 Fenestration products and exterior doors.
A6.205.1.1 Certification of fenestration products and exterior door other than field-
fabricated.||||| |A6.205.1.2 Installation of field-fabricated fenestration and exterior doors.||||| |A6.205.2 Joints and other openings.||||| |A6.205.3 Installation and roofing products.|||||

2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A6.1-37

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

NONRESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST [OSHPD 1, 2 and 4] — continued

FEATURE OR MEASURE	COMPLIANCE LEVELS	Col3	Col4	NOTES
FEATURE OR MEASURE	Mandatory *CALGreen*	VOLUNTARY *CALGreen*	VOLUNTARY *CALGreen*	VOLUNTARY *CALGreen*
FEATURE OR MEASURE	Mandatory *CALGreen*	Tier 1	Tier 2	Tier 2
SECTION A6.207 HVAC Design, Equipment and Installation
A6.207.1 Space-conditioning equipment certification by manufacturers. A6.207.1.1 Efficiency. A6.207.1.2 Controls for heat pumps with supplementary electric resistance heaters. A6.207.1.3 Thermostats. A6.207.1.4 Gas-and oil-fired furnace standby loss controls.		    	    
A6.207.2 Space conditioning systems. A6.207.2.1 Supply air temperature reset controls. A6.207.2.2 Electric resistance heating. A6.207.2.3 Heat rejection systems. A6.207.2.4 Hydronic system measures. A6.207.2.5 Air distribution system duct leakage sealing. **A6.207.2.6 Variable air volume control for single zone systems.

CALGreen § 204.4.6 High relevance — show source text

A6.204.4.6 Commissioning report. The CxA shall create a complete report of commissioning process activities undertaken through the design, construction and postconstruction phases of the building project and provided to the owner.

A6.204.6 Building orientation and shading. Locate orient and shade the building as required in Section A6.106.9.

SECTION A6.205 [OSHPD 1 & 4]—BUILDING ENVELOPE

A6.205.1 Fenestration products and exterior doors.

A6.205.1.1 Certification of fenestration products and exterior doors other than field-fabricated. Any fenestration product and exterior door, other than field-fabricated fenestration products and field-fabricated exterior doors, may be installed only if the manufacturer has certified to the California Energy Commission or if an independent certifying organization approved by the Commission has certified that the product complies with all of the applicable requirements of this subsection.

A6.205.1.1.1 Air leakage. Manufactured fenestration products and exterior doors shall have air infiltration rates not exceeding 0.3 cfm/ft [2] of window area, 0.3 cfm/ft [2] of door area for residential doors, 0.3 cfm/ft [2] of door area for nonresidential single doors

APPENDIX A6.1-4 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

(swinging and sliding) and 1.0 cfm/ft [2] for nonresidential double doors (swinging), when tested according to NFRC-400 or ASTM E283 at a pressure differential of 75 pascals (or 1.57 pounds/ft [2] ), incorporated herein by reference.

A6.205.1.1.2 U -factor. A fenestration product’s U -factor shall be rated in accordance with NFRC 100 or the applicable default U -factor set forth in Table A.5.205.1-A.

Exception: If the fenestration product is a skylight or is site-built fenestration in a building covered by the nonresidential standards with less than 10,000 square feet of site-built fenestration, the default U- factor may be calculated as set forth in Reference Nonresidential Appendix NA6 of the California Energy Commission 2008 Building Energy Efficiency Standards for Residential and Nonresidential Buildings.

TABLE A.5.205.1-A—DEFAULT FENESTRATION PRODUCT U-FACTORS	Col2	Col3	Col4	Col5
FRAME	PRODUCT TYPE	SINGLE PANE U-FACTOR	DOUBLE PANE1 U-FACTOR	GLASS BLOCK2 U-FACTOR
Metal	Operable	1.28	0.79	0.87
Metal	Fixed	1.19	0.71	0.72
Metal	Greenhouse/garden window	2.26	1.40	N.A.
Metal	Doors	1.25	0.77	N.

CALGreen § 204.4.3. High relevance — show source text
**A commissioning plan describing how the project will be
commissioned shall be started during the design phase of the building project and shall
include as a minimum items listed in Section A6.204.4.3.
A6.204.4.4 Functional performance testingshall demonstrate the correct installation and
operation of each component, system and system-to-system interface in accordance with
the approved plans and specifications.
**A6.204.4.5 Post construction documentation and training.**A systems manual and
systems operations training are required.
**A6.204.4.5.1 Systems manual.**The systems manual shall be delivered to the building
owner and facilities operator and shall include the items listed in Section A6.204.4.5.1.
A6.204.4.5.2 Systems operations training. The training of the appropriate maintenance
staff for each equipment type and/or system shall include as a minimum items listed in
Section A6.204.4.5.2.
**A6.204.4.6 Commissioning report.**A complete report of commissioning process activities
undertaken through the design, construction and postconstruction phases of the building
project shall be completed and provided to the owner.||
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|| |**A6.204.6 Building orientation and shading.**Locate orient and shade the building as
required in Section A6.106.11.||||| |SECTION A6.205 Building Envelope||||| |A6.205.1 Fenestration products and exterior doors.
A6.205.1.1 Certification of fenestration products and exterior door other than field-
fabricated.||||| |A6.205.1.2 Installation of field-fabricated fenestration and exterior doors.||||| |A6.205.2 Joints and other openings.||||| |A6.205.3 Installation and roofing products.|||||

2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A6.1-37

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

NONRESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST [OSHPD 1, 2 and 4] — continued
CALGreen § 204.4.4 High relevance — show source text
A6.204.4.4 Functional performance testing. Functional performance tests shall demonstrate the correct installation and operation of each component, system and system-to-system interface in accordance with the approved plans and specifications. Functional performance testing reports shall contain information addressing each of the building components tested, the testing methods utilized and include any readings and adjustments made. This shall be reviewed and verified by the CxA.

A6.204.4.5 Postconstruction documentation and training. A systems manual and systems operations training are required.

A6.204.4.5.1 Systems manual. Documentation of the operational aspects of the building shall be completed within the systems manual and delivered to the building owner and facilities operator. This shall be reviewed by the CxA. At a minimum, the systems manual shall include the following:
1. Site information, including facility description, history and current requirements.
2. Site contact information.
3. Basic operations and maintenance, including general site operating procedures, basic troubleshooting, recommended maintenance requirements, site events log.
4. Major systems.
5. Site equipment inventory and maintenance notes.
6. Other resources and documentation.
A6.204.4.5.2 Systems operations training. The CxA shall oversee the training of the appropriate maintenance staff for each equipment type and/or system. The training shall include, as a minimum, the following:
1. System/equipment overview (what it is, what it does and what other systems and/or equipment it interfaces with).
2. Review of the information in the systems manual.
3. Review of the record drawings on the system/ equipment.
A6.204.4.6 Commissioning report. The CxA shall create a complete report of commissioning process activities undertaken through the design, construction and postconstruction phases of the building project and provided to the owner.

A6.204.6 Building orientation and shading. Locate orient and shade the building as required in Section A6.106.9.

SECTION A6.205 [OSHPD 1 & 4]—BUILDING ENVELOPE

A6.205.1 Fenestration products and exterior doors.

A6.205.1.1 Certification of fenestration products and exterior doors other than field-fabricated. Any fenestration product and exterior door, other than field-fabricated fenestration products and field-fabricated exterior doors, may be installed only if the manufacturer has certified to the California Energy Commission or if an independent certifying organization approved by the Commission has certified that the product complies with all of the applicable requirements of this subsection.

A6.205.1.1.1 Air leakage. Manufactured fenestration products and exterior doors shall have air infiltration rates not exceeding 0.3 cfm/ft [2] of window area, 0.3 cfm/ft [2] of door area for residential doors, 0.3 cfm/ft [2] of door area for nonresidential single doors

APPENDIX A6.1-4 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

CALGreen § 110.6 High relevance — show source text

(b) Installation of field-fabricated fenestration and exterior doors. Field-fabricated fenestration and field-fabricated exterior doors may be installed only if the compliance documentation has demonstrated compliance for the installation using U factors from Table 110.6-A and SHGC values from Table 110.6-B. Field-fabricated fenestration and field-fabricated exterior doors shall be caulked between the fenestration products or exterior door and the building, and shall be weatherstripped.

Exception to Section 110.6(b): Unframed glass doors and fire doors need not be weatherstripped or caulked.

TABLE 110.6-A—DEFAULT FENESTRATION PRODUCT U-FACTORS	Col2	Col3	Col4	Col5
FRAME1,2	PRODUCT TYPE	SINGLE PANE3, 4 U-FACTOR	DOUBLE PANE1, 3, 4 U-FACTOR	GLASS BLOCK2, 3 U-FACTOR
Metal	Operable	1.28	0.79	0.87
Metal	Fixed	1.19	0.71	0.72
Metal	Greenhouse/garden window	2.26	1.40	NA
Metal	Glazed doors	1.25	0.77	NA
Metal	Skylight	1.98	1.3	NA
Metal, thermal break	Operable	NA	0.66	NA
Metal, thermal break	Fixed	NA	0.55	NA
Metal, thermal break	Greenhouse/garden window	NA	1.12	NA
Metal, thermal break	Glazed doors	NA	0.59	NA
Metal, thermal break	Skylight	NA	1.11	NA
Nonmetal	Operable	0.99	0.58	0.60
Nonmetal	Fixed	1.04	0.55	0.57
Nonmetal	Greenhouse/garden window	0.99	0.53	NA
Nonmetal	Glazed doors	1.94	1.06	NA
Nonmetal	Skylight	1.47	0.84	NA
1. For all dual-glazed fenestration products, adjust the listed_U_-factors as follows: a. Add 0.05 for products with dividers between panes if spacer is less than7/16 inch wide. b. Add 0.05 to any product with true divided lite (dividers through the panes). 2. Translucent or transparent panels shall use glass block values when not rated by NFRC 100. 3. Visible Transmittance (VT) shall be calculated by using Reference Nonresidential Appendix NA6. 4. Windows with window film applied that is not rated by NFRC 100 shall use the default values from this table.	1. For all dual-glazed fenestration products, adjust the listed_U_-factors as follows: a. Add 0.05 for products with dividers between panes if spacer is less than7/16 inch wide. b. Add 0.05 to any product with true divided lite (dividers through the panes). 2. Translucent or transparent panels shall use glass block values when not rated by NFRC 100. 3.

CALGreen § 140.3 High relevance — show source text

TABLE 140.3-D—PRESCRIPTIVE ENVELOPE CRITERIA FOR RELOCATABLE PUBLIC SCHOOL BUILDINGS FOR USE IN ALL CLIMATE ZONES	Col2	Col3
ENVELOPE FEATURE	CRITERIA	VALUE
Roofs and Ceilings – Metal Buildings	Maximum U-factor	0.038
Roofs and Ceilings – Nonmetal Buildings	Maximum U-factor	0.028
Walls – Wood-framed buildings	Maximum U-factor	0.038
Walls – Metal-framed buildings	Maximum U-factor	0.055
Walls – Metal buildings	Maximum U-factor	0.053
Walls – Mass/7.0 ≤ HC	Maximum U-factor	0.138
Walls – All Other Walls	Maximum U-factor	0.038
Floors and Soffits – Raised Mass	Maximum U-factor	0.058
Floors and Soffits – Other	Maximum U-factor	0.039
Roofing Products – Low-Sloped	Aged Solar Reflectance	0.63
Roofing Products – Low-Sloped	Thermal Emittance	0.75
Roofing Products – Steep-Sloped	Aged Solar Reflectance	0.25
Roofing Products – Steep-Sloped	Thermal Emittance	0.80
Fenestration – Fixed Windows	Maximum U-factor	0.34
Fenestration – Fixed Windows	Maximum RSHGC	0.22
Fenestration – Fixed Windows	Minimum VT	0.42
Fenestration – Operable Windows	Maximum U-factor	0.46
Fenestration – Operable Windows	Maximum RSHGC	0.22
Fenestration – Operable Windows	Minimum VT	0.32
Fenestration – Glazed Doors (Site-Built and Factory Assembled)	Maximum U-factor	0.45
Fenestration – Glazed Doors (Site-Built and Factory Assembled)	Maximum RSHGC	0.23
Fenestration – Glazed Doors (Site-Built and Factory Assembled)	Minimum VT	0.17
Fenestration – Skylights	Maximum U-factor	See Table 140.3-B
Fenestration – Skylights	Maximum RSHGC	See Table 140.3-B
Fenestration – Skylights	Minimum VT	See Table 140.3-B
Fenestration – Skylights	Maximum SRR	5%
Exterior Doors – Non-Swinging doors	Maximum U-factor	0.50
Exterior Doors – Swinging doors	Maximum U-factor	0.70

(b) Reserved.

(c) Minimum daylighting requirement for large enclosed spaces. In climate zones 2 through 15, conditioned enclosed spaces, and unconditioned enclosed spaces that are greater than 5,000 square feet and that are directly under a roof with ceiling heights greater than 15 feet, shall meet the following requirements:

A combined total of at least 75 percent of the floor area, as determined in building floor plan (drawings) view, shall be within one or more of the following: A. Primary sidelit daylit zone in accordance with Section 130.1(d), or B. The total floor area in the space within a horizontal distance of 0.7 times the average ceiling height from the edge of rough opening of skylights.

CALGreen § 110.3.4.1 High relevance — show source text
110.3.4.1 [HCD 1] Moisture content verification. Moisture content of framing members shall be verified in accordance with the California Green Building Standards Code (CALGreen), Chapter 4, Division 4.5.

[A] 110.3.5 Types IV-A, IV-B and IV-C connection protection inspection. In buildings of Types IV-A, IV-B and IV-C construction, where connection fire-resistance ratings are provided by wood cover calculated to meet the requirements of Section 2304.10.1, inspection of the wood cover shall be made after the cover is installed, but before any other coverings or finishes are installed.

[A] 110.3.6 Lath and gypsum panel product inspection. Lath and gypsum panel product inspections shall be made after lathing and gypsum panel products, interior and exterior, are in place, but before any plastering is applied or gypsum panel product joints and fasteners are taped and finished.

Exception: Gypsum panel products that are not part of a fire-resistance-rated assembly or a shear assembly.

[A] 110.3.7 Weather-exposed balcony and walking surface waterproofing. Where balconies or other elevated walking surfaces have weather-exposed surfaces, and the structural framing is protected by an impervious moisture barrier, all elements of the impervious moisture barrier system shall not be concealed until inspected and approved.

Exception: Where special inspections are provided in accordance with Section 1705.1.1, Item 3.

[A] 110.3.8 Fire- and smoke-resistant penetrations. Protection of joints and penetrations in fire-resistance-rated assemblies, smoke barriers and smoke partitions shall not be concealed from view until inspected and approved.

[A] 110.3.9 Energy efficiency inspections. Inspections shall be made to determine compliance with Chapter 13 and shall include, but not be limited to, inspections for: envelope insulation R- and U-values, fenestration U-value, duct system R-value, and HVAC and water-heating equipment efficiency.

[A] 110.3.10 Other inspections. In addition to the inspections specified in Sections 110.3.1 through 110.3.9, the building official is authorized to make or require other inspections of any construction work to ascertain compliance with the provisions of this code and other laws that are enforced by the department of building safety.

[A] 110.3.11 Special inspections. For special inspections, see Chapter 17.

[A] 110.3.12 Final inspection. The final inspection shall be made after all work required by the building permit is completed.

[A] 110.3.12.1 Flood hazard documentation. If located in a flood hazard area, documentation of the elevation of the lowest floor or the elevation of dry floodproofing, if applicable, as required in Section 1612.4 shall be submitted to the building official prior to the final inspection.

110.3.12.2 [HCD 1] Operation and maintenance manual. At the time of final inspection, a manual, compact disc, web-based reference or other media acceptable to the enforcing agency shall be placed in the building in accordance with the California Green Building Standards Code (CALGreen), Chapter 4, Division 4.4.

[A] 110.4 Inspection agencies. The building official is authorized to accept reports of approved inspection agencies, provided that such agencies satisfy the requirements as to qualifications and reliability.
California Green Building Standards Code (CALGreen) High relevance — show source text

2
3|NA
NA
NA|NA
NA
NA|22
29
34|22
29
34|NA
NA
97|NA
NA
102|41
53
62|130
136
143|151
150
166|70
86
99|202
210
217|225
255
277|106
128
147|267
276
284|316
358
389|151
181
207| |15|1
2
3|NA
NA
NA|NA
NA
NA|23
30
34|23
30
34|NA
92
96|NA
103
112|43
54
63|129
135
141|151
170
185|73
88
101|199
207
215|271
295
315|112
132
151|268
277
286|376
411
439|161
189
213| |20|1
2
3|NA
NA
NA|NA
NA
NA|23
30
35|23
30
35|87
91
96|99
111
119|45
55
64|128
134
140|167
185
199|76
90
103|197
205
213|303
325
343|117
136
154|265
274
282|425
455
481|169
195
219| |30|1
2
3|NA
NA
NA|NA
NA
NA|24
31
35|24
31
35|86
91
95|108
119
127|47
57
65|126
132
138|187
203
216|80
93
105|193
201
209|347
366
381|124
142
160|259
269
277|492
518
540|183
205
229| |50|1
2
3|NA
NA
NA|NA
NA
NA|24
31
35|24
31
35|85
89
94|113
123
131|50
60
68|124
130
136|204
218
231|87
100
112|188
196
205|392
408
422|139
158
176|252
262
271|567
588
607|208
230
255| |100|1
2
CALGreen § 8-40 High relevance — show source text
. . . . . . . . . . . . . 8-40

APPENDIX A4 RESIDENTIAL

VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A4-3

A4.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A4-3 A4.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . . APPENDIX A4-9 A4.3 Water Efficiency and Conservation . . . APPENDIX A4-13 A4.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A4-15 A4.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A4-19 A4.6 Tier 1 and Tier 2 . . . . . . . . . . . . . . . . . . . . APPENDIX A4-21

Division A4.6—Residential Occupancies Application Checklist . . . . . . . . . . . . . APPENDIX A4-23 A4.7 Residential Model Ordinance . . . . . . . . . APPENDIX A4-31

APPENDIX A5 NONRESIDENTIAL

VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A5-3

A5.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A5-3 A5.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . APPENDIX A5-13 A5.3 Water Efficiency and Conservation . . . APPENDIX A5-19 A5.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-25 A5.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A5-35 A5.6 Voluntary Tiers . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-41 A5.601 CALGren Tier 1 and Tier 2. . . . . . . . . . APPENDIX A5-41

A5.602 CALGreen Verification Guidelines Mandatory Measures Checklist . . . . . . . . . . . . . . . APPENDIX A5-44

A5.602.1 CALGreen Verification Guidelines

Tier 1 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-48

A5.602.2 CALGreen Verification Guidelines

Tier 2 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-55

APPENDIX A6 VOLUNTARY STANDARDS FOR HEALTH
CALGreen § 905.8 High relevance — show source text
905.8 Installation in Commercial

Garages and Aircraft Hangars . . . 203

905.9 Electric Duct Heaters . . . . . . . . . . 203

906.0 Floor Furnaces . . . . . . . . . . . . . . . 203

906.1 Application . . . . . . . . . . . . . . . . . . 203

906.2 Installation . . . . . . . . . . . . . . . . . . 204

906.3 Temperature Limit Controls . . . . . 204

906.4 Combustion and Circulating Air. . . 204

906.5 Placement. . . . . . . . . . . . . . . . . . . 204

906.6 Bracing . . . . . . . . . . . . . . . . . . . . . 204

906.7 Support . . . . . . . . . . . . . . . . . . . . . 204

906.8 Clearance . . . . . . . . . . . . . . . . . . . 204

906.9 Access . . . . . . . . . . . . . . . . . . . . . 204

906.10 Seepage Pan . . . . . . . . . . . . . . . . 204

906.11 Wind Protection . . . . . . . . . . . . . . 204

906.12 Upper Floor Installations. . . . . . . . 204

906.13 First Floor Installation . . . . . . . . . . 204

906.14 Oil-Fired Floor Furnaces. . . . . . . . 204

xxxv

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

TABLE OF CONTENTS

907.0 Wall Furnaces. . . . . . . . . . . . . . . . 204

907.1 Application . . . . . . . . . . . . . . . . . . 204

907.2 Installation . . . . . . . . . . . . . . . . . . 204

907.3 Location . . . . . . . . . . . . . . . . . . . . 205

907.4 Combustion and Circulating Air . . 205

907.5 Oil-Fired Wall Furnaces . . . . . . . . 205

908.0 Clothes Dryers . . . . . . . . . . . . . . . 205

908.1 Application . . . . . . . . . . . . . . . . . . 205

908.2 Electric Clothes Dryers . . . . . . . . . 205

908.3 Gas-Fired Clothes Dryers. . . . . . . 205

909.0 Conversion Burners . . . . . . . . . . . 205

909.1 General. . . . . . . . . . . . . . . . . . . . . 205

910.0 Burner Assemblies . . . . . . . . . . . . 206

910.1 Oil Burners . . . . . . . . . . . . . . . . . . 206

910.2 Gas Burners . . . . . . . . . . . . . . . . . 206

911.0 Decorative Appliances for Installation in Vented Fireplaces. . . 206

Frequently asked questions

Do field‑fabricated windows have to meet the same air‑leakage tests as factory units?

No. Field‑fabricated fenestration is excepted from the manufacturer certification/air‑leakage labeling pathway, but the installation must demonstrate compliance using the code U‑factors and SHGC values and the product‑to‑building interface must be caulked and weatherstripped per § A6.205.1.2.

What is the air‑leakage limit for windows?

Manufactured fenestration must have air infiltration not exceeding 0.3 cfm/ft² of window area when tested per NFRC‑400 or ASTM E283 at 75 Pa (see § A6.205.1.1.1).

Can I use urea formaldehyde foam anywhere?

No. Urea formaldehyde foam may be used only in exterior side walls and only if a 4‑mil polyethylene (or equivalent) vapor barrier is installed between the foam and interior space, per § A6.205.3.2.

What labeling do inspectors expect on fenestration?

A temporary label (or label certificate for site‑built/CMA) that lists certified U‑factor and SHGC must remain until inspection; permanent labeling is required when NFRC ratings are used, per § A6.205.1.1.4.

Do I have to seal every small penetration?

Yes — § A6.205.2 requires that joints and other openings that are potential sources of air leakage be caulked, gasketed, weatherstripped or otherwise sealed to limit infiltration/exfiltration.

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Site Planning and Design (Division A6.1)

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