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This document outlines essential definitions and requirements for wet areas within buildings as per the Building Code of Australia (BCA). It defines wet areas, including bathrooms and laundries, and distinguishes them from kitchens and food preparation areas. It covers the risks associated with wet areas, categorized as high, medium, and low risk, along with the necessary drainage requirements and management of water spillage. Additionally, it discusses waterproof systems and construction standards for elements like preformed shower bases. Understanding these guidelines is critical for preventing water damage and ensuring compliance.
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Definitions BCA Part 3.8.1 Wet Area – an are within a building, supplied with water from a water supply Includes bathrooms, showers, laundries and sanitary compartments. Does Not Include Kitchens, bar area, kitchenettes or domestic food preparation areas Water Resistant – means the property of a system or material that restricts moisture movement and will not degrade under conditions of moisture. WaterproofSystem – Combination of elements that are required to achieve a waterproof barrier, may include membrane, substrate, bond breakers, sealants etc
Risk Potential For Wet AreasAS 3740 • High Risk – Shower Recesses • Medium Risk – Rest of Bathroom & Laundry • Low Risk – WC Room & immediate area around a kitchen sink, bar or similar
AS 3740 – High Risk • Means high probability of damage to structure if water within high risk area is not contained and discharged to drainage outlet.
AS 3740 – Medium Risk • Accidental spillage must be contained to with in the room. • It is imperative that water not be allowed to pass into concealed spaces or to adjoining rooms • Drainage not neccessary
AS 3740 – Low Risk • Risk of accidental spillage is low requirement to stop water traversing to adjoining rooms
Preformed Shower Bases • Must be fully supported • Recessed Into Walls
Definition • Hob – Upstand at the perimeter to a shower area
