Using a Window as Part of a Pool Barrier Requirements

What This Requirement Covers

This requirement covers when and how a window may form part of a barrier that restricts access to a swimming pool on a property. It exists to prevent young children gaining unsupervised access to pool water, reducing drowning risk by ensuring any opening in a building envelope adjacent to a pool cannot be readily used as a point of entry. The provision captures any opening described as a window including openable louvres or panels that act like a window for the purpose of pool safety.

These rules apply to pools associated with buildings where the National Construction Code (NCC) and state pool safety legislation require a barrier - typically pools with a depth of water greater than 300 mm. The requirements sit in the NCC Volumes and the ABCB Housing Provisions and reference AS 1926 (pool barrier standards). They are relevant to designers, certifiers, builders, and homeowners wherever a window is located so that a child could reach or climb through to the pool area.

Key Requirements

1. Pools covered: applies where a swimming pool has a water depth greater than 300 mm (see NCC Volume Two Part H7 and related state provisions).
2. Barrier continuity and purpose: a pool barrier must be continuous around the hazard and be of sufficient strength and rigidity to resist foreseeable impact and restrict young children from the pool and immediate surrounds (see NCC Volume One - Part G1 or Volume Two - Part H7 depending on building class and jurisdiction).
3. Window protection trigger height: where the surface under a window is 4.0 m or more below the floor level at the window, an openable window must be provided with protective guarding (ABCB Housing Provisions, Section 11.3.8).
4. Minimum guarding height for openable windows: the protective barrier or guarding for the openable part of the window must be not less than 865 mm above the floor (ABCB Housing Provisions, 11.3.8).
5. Openings and sphere test: any protective barrier required for the openable part of the window must not permit a 125 mm sphere to pass through (ABCB Housing Provisions, 11.3.8).
6. Horizontal element restriction: the guarding must not have any horizontal or near-horizontal elements between 150 mm and 760 mm above the floor that facilitate climbing (ABCB Housing Provisions, 11.3.8).
7. Windows captured: the term “window” in the Housing Provisions is used broadly to include openings that let in air (for example metal louvres or openable panels) and therefore these are subject to the same guarding requirements (ABCB Housing Provisions explanatory information, 11.3.7).
8. Compliance with AS standards: pool barriers including boundary barriers for pools associated with Class 1 buildings must comply with AS 1926.1 and AS 1926.2 (as referenced in NCC Volume Two Part H7 and state variations such as NSW H7D2).
9. Gates and latches: gates and doors forming part of the barrier must be fitted with latching devices not readily operated by young children and be constructed to automatically close and latch (NCC Volume One - NSW provisions G1P2 / Volume Two H7P1 where state schedules apply).
10. Structural sufficiency: in addition to barrier specifics, pools and their barriers must meet relevant structural requirements in the NCC and referenced standards for materials and loadings (see NCC Volume Two explanatory information and cross-volume references).

Relevant citations

1. NCC Volume Two, Part H7 (Swimming pools/Swimming pool access).
2. NCC Volume One, Part G1 (Minor structures and components) where cross-referenced for Class 2-4 or other buildings.
3. ABCB Housing Provisions 2022, Section 11.3.8 (Protection of openable windows - rooms other than bedrooms).
4. AS 1926.1 and AS 1926.2 (Barrier and fencing requirements for swimming pools).

Residential vs Commercial

1. Residential (Class 1 and Class 10a ancillary structures): the NCC and the ABCB Housing Provisions explicitly reference protection of openings and require AS 1926 compliance for pool barriers associated with houses and private dwellings. Openable windows where the drop to external surfaces is 4.0 m or more must have guarding of at least 865 mm high and meet the 125 mm sphere and anti-climb (150-760 mm) requirements (ABCB Housing Provisions, 11.3.8). State pool safety legislation commonly applies to private residential pools and will prevail where inconsistent.
2. Commercial / Multi-residential (Class 2-9): pools associated with Class 2, 3 or 4 parts of buildings are required to have suitable barriers in accordance with NCC Volume One or Volume Two provisions and AS 1926.1/1926.2. The NCC wording can vary by state schedule; for example NSW inserts specific H7/G1 provisions requiring AS 1926 compliance for Class 2/3/4 pools. In multi-residential or public pools additional public safety, access, and supervision obligations may apply under other standards or local regulations.

In short: the technical guarding dimensions for a window used as part of a barrier (865 mm guarding, 125 mm sphere, no horizontal climbable elements 150-760 mm) come from the ABCB Housing Provisions and are especially applied to residential situations; barrier strength, gate latches and AS 1926 compliance apply across residential and commercial where the NCC requires a barrier.

Exceptions and Exemptions

1. Out-of-ground pools: out-of-ground pool walls, above-ground pools and inflatable pools may not be considered effective barriers under some NCC state provisions and specific treatment is provided in state schedules (see NCC Volume Two H7 explanatory notes and state clauses).
2. Alternative compliance: where a performance solution is proposed, alternative barrier systems may be accepted if proven to meet the performance requirements (e.g., restrict access by young children and provide strength/rigidity). Such solutions should be documented and approved by the relevant certifier and reference AS 1926 performance criteria.
3. Small water features: the NCC and AS 1926 definitions and state pool legislation typically limit mandatory barrier requirements to pools with water depth greater than 300 mm; features with lesser depth may fall outside mandatory barrier provisions but local regulations should be checked.
4. State legislative precedence: where state or territory pool safety laws or regulations impose different or additional requirements, those laws prevail. Check state schedules in NCC Volume One/Two for modifications.

State and Territory Variations

1. New South Wales: NSW replaces parts of the NCC with state-specific clauses (NSW H7P1, H7D2 and NSW G1P2 / G1D2) and explicitly requires AS 1926.1 and AS 1926.2 for swimming pools with depth over 300 mm associated with Class 1, 2, 3 or 4 buildings (see NCC Volume Two/One NSW schedules). NSW also references the Swimming Pools Act 1992 and the Swimming Pool Regulation 2018 which govern additional inspection and compliance obligations.
2. Other states and territories: each jurisdiction has its own schedule in NCC Volume One or Two (Schedules 4-12) which may modify or add requirements. For example, states may adopt the ABCB Housing Provisions but add local procedural or structural conditions, or specify different inspection/enforcement frameworks under local pool safety legislation.
3. Reminder: always verify the applicable state schedule in NCC 2022 Volume One or Volume Two (Schedules 4-12) and the local pool safety legislation because state schedules can change how the national provisions apply.

Practical Compliance Tips

1. Inspect fall height: measure the vertical distance from the room floor at each window to the external surface or pool area - if it is 4.0 m or more, apply the guarding requirements in ABCB Housing Provisions 11.3.8.
2. Use the 125 mm sphere rule: ensure any guarding, screens, grilles or fixed bars do not allow a 125 mm sphere to pass through to meet the opening limitation test.
3. Avoid climbable details: keep horizontal or near-horizontal elements out of the 150-760 mm band to prevent footholds that assist climbing.
4. Specify 865 mm minimum: where guarding is required for the openable part of a window, provide a barrier at least 865 mm above the floor level.
5. Follow AS 1926 where a window forms part of the barrier: if the window is part of the continuous pool barrier, ensure the entire assembly meets AS 1926.1 and AS 1926.2, including gate hardware and latch heights.
6. Document performance solutions: if proposing an alternative barrier (performance solution), prepare evidence showing equivalent or superior child access resistance and get early agreement from the certifier.
7. Check state schedules and pool laws: confirm any state-specific modifications in the applicable NCC schedule and local pool safety legislation (for example NSW Swimming Pools Act and Regulation) before finalising designs or approvals.

Cited references: NCC 2022 Volume Two - Part H7 (Swimming pools), NCC 2022 Volume One - Part G1 (Minor structures and components) where applicable, ABCB Housing Provisions 2022 Section 11.3.8 (Protection of openable windows - rooms other than bedrooms), and AS 1926.1 / AS 1926.2 (Barrier standards).