# WAC 246-359-500: WAC 246-359-500. Window construction requirements

> Washington · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_500

## Section

- **Citation:** WAC 246-359-500
- **Heading:** WAC 246-359-500. Window construction requirements
- **Jurisdiction:** Washington
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Washington Administrative Code / Title 246 / Chapter 246-359 / Section 246-359-500

## Text

(1) All habitable rooms and spaces must be provided with windows the total area of which must be not less than one-tenth of the floor area.
(2) At least one-half of each required window must be able to open for ventilation purposes.
(3) Every sleeping room must have at least one operable window or door for emergency escape or rescue directly opening to an outside area to provide a clear escape away from the building.
(4) Escape or rescue windows must have:
(a) A minimum net clear openable area of five point seven square feet; and
(b) A finished sill height not more than forty-four inches above the floor.
(c) The following minimum net clear openable dimensions:
(i) The height dimension of twenty-four inches; and
(ii) The width dimension of twenty inches.
(5) All operable window openings must be screened with sixteen-mesh material.

## Nearby sections

- [WAC 246-359-001 WAC 246-359-001. Purpose and scope](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_001.md)
- [WAC 246-359-005 WAC 246-359-005. Applicability](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_005.md)
- [WAC 246-359-010 WAC 246-359-010. Definitions](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_010.md)
- [WAC 246-359-020 WAC 246-359-020. Powers and duties of the department of health](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_020.md)
- [WAC 246-359-030 WAC 246-359-030. Cooperation with the department of health—Right of entry](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_030.md)
- [WAC 246-359-040 WAC 246-359-040. Appeals](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_040.md)
- [WAC 246-359-050 WAC 246-359-050. Minor variances to the TWH construction standard](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_050.md)
- [WAC 246-359-060 WAC 246-359-060. Architect or engineer of record and plan submittal responsibilities](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_060.md)
- [WAC 246-359-070 WAC 246-359-070. Application and construction documents required for plan review](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_070.md)
- [WAC 246-359-080 WAC 246-359-080. Plan review approval and expiration of plan approval](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_080.md)
- [WAC 246-359-090 WAC 246-359-090. Issuing and maintaining a construction permit](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_090.md)
- [WAC 246-359-100 WAC 246-359-100. Expiration and extension of construction permits](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_100.md)
- [WAC 246-359-110 WAC 246-359-110. Construction without a permit](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_110.md)
- [WAC 246-359-120 WAC 246-359-120. Required inspections](https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_120.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_WA_ADC_246_359_500. Check the current official text before relying on it. Not legal advice.