Part F2 Wet areas and overflow protection
Introduction to this Part
This Part is intended to minimise the risk of water from internal wet areas accumulating within a building and causing musty, damp or unhealthy conditions or damaging building elements by corrosion or other degradation. It is also intended to prevent water from internal parts of a building causing damage to other property or parts of a building.
Objectives
F2O1
Objective
New for 2022
The Objective of this Part is to—
- safeguard occupants from illness or injury and protect buildings from damage caused by—
- internal water from wet areas; and
- the accumulation of internal moisture in the building; and
- protect other property from damage caused by redirected internal water from wet areas.
Functional Statements
F2F1
Wet areas
New for 2022
A building including internal wet areas is to be constructed in a way that protects people, the building and other property from the adverse effects of internal water from wet areas.
F2F2
Overflow from bathrooms and laundries
2019: FF1.3
A building is to be constructed to avoid the likelihood of—
- the creation of unhealthy or dangerous conditions; and
- damage to building elements,
caused by dampness or water overflow from bathrooms, laundries and the like.
Performance Requirements
F2P1
Wet area overflows
2019: FP1.6
Overflow from a bathroom, laundry facility or the like must be prevented from penetrating to adjoining rooms or spaces.
Wet area overflows
Overflow from a bathroom, laundry facility or the like must be prevented from penetrating to—
- another sole-occupancy unit used for sleeping accommodation; and
- a public space,
in a storey below in the same building.
F2P2
Wet areas
2019: FP1.7
To protect the structure of the building and to maintain the amenity of the occupants, water must be prevented from penetrating—
- behind fittings and linings; and
- into concealed spaces,
of sanitary compartments, bathrooms, laundries and the like.
In laundries, bathrooms or rooms containing shower facilities the floors must be installed in a manner that will prevent accumulation of surface water which could create unhealthy or hazardous conditions.
Prevention of surface water accumulation
Verification Methods
F2V1
Overflow protection
2019: FV1.2
Deemed-to-Satisfy Provisions
F2D1
Deemed-to-Satisfy Provisions
New for 2022
F2D2
Wet area construction
2019: F1.7(a) and (b)
- be water resistant or waterproof in accordance with Specification 26; and
- comply with AS 3740.
SA F2D2 Wet area construction2019: F1.7(a) and (b)
- be water resistant or waterproof in accordance with Specification 26, except that—
- in any room containing a washing machine, the wall area from finished floor to a minimum of 75 mm above and 75 mm each side of the washing machine tap outlets must be water resistant; and
- where a vessel is inset into a bench top in a kitchen, bar area, kitchenette or domestic food and beverage preparation area, the perimeter edges of the vessel must be water resistant for the extent of the vessel; and
- penetrations in horizontal surfaces for tap and spout outlets in kitchens, bar areas, kitchenettes or domestic food and beverage preparation areas must be waterproof; and
- comply with AS 3740.
- be water resistant or waterproof in accordance with Specification 26; and
- comply with AS 3740,
as if they were in a Class 2 or 3 building or a Class 4 part of a building.
F2D3
Rooms containing urinals
2019: F1.7(c), (d) and (e)
- the floor surface of the room containing the urinal must be an impervious material; and
- where no step is installed, must—
- be graded to the urinal channel for a distance of 1.5 m from the urinal channel; and
- have the remainder of the floor graded to a floor waste; and
- where a step is installed—
- the step must have an impervious surface and be graded to the urinal channel; and
- the floor behind the step must be graded to a floor waste; and
- where no step is installed, must—
- the junction between the floor surface and the urinal channel must be impervious.
- the wall must be surfaced with impervious material extending from the floor to not less than 50 mm above the top of the urinal and not less than 225 mm on each side of the urinal; and
- the floor must be surfaced with an impervious material and be graded to a floor waste.
- the wall must be surfaced with an impervious material extending from the floor to not less than 100 mm above the floor surface; and
- the junction of the floor surface and the wall surface must be impervious.
F2D4
Floor wastes
2019: F1.11
- all vessels in the wet area are provided with in-built overflow protection or have permanent open trapped connection to the plumbing and drainage system (such as a WC pan); or
- the vessel is a clinical hand washing basin in a Class 9c building; or
- the floor waste is provided solely for the connection of plumbing fixtures and all vessel in the wet area are provided with in-built overflow protection or have permanent open trapped connection to the plumbing and drainage system (such as a WC pan).
Provision of floor wastes
- the minimum continuous fall of a floor plane to the waste must be 1:80; and
- the maximum continuous fall of a floor plane to the waste must be 1:50.