Part 13.4 Building sealing
Application of Part 13.4
- The term “cannot be fully enclosed” means parts of buildings with permanent openings such as balconies, shade rooms, rooms with fixed louvres, mesh or other material that allows air flow. Adjustable louvres are considered to provide full enclosure to the opening they accommodate. Such rooms are unlikely to be conditioned given the high air flow rates; therefore application of the Performance Requirement to these parts of buildings would not result in reduction in energy use.
- Appropriate ventilation for gas appliances can be obtained from relevant legislation, referenced standards and product installation manuals.
Application of Part 13.4
- An evaporatively cooled building in climate zones 4 and 6 must be sealed because of the likelihood of the building being heated during colder periods.
- Appropriate ventilation requirements for gas appliances can be obtained from relevant legislation, referenced standards and product installation manuals.
Chimneys and flues
The chimney or flue of an open solid-fuel burning appliance must be provided with a damper or flap that can be closed to seal the chimney or flue.
- The requirements of this Part are to be read in conjunction with the fire safety requirements in Part 12.4 of the ABCB Housing Provisions.
- A solid-fuel burning appliance is a heater that burns materials such as timber, coal and the like. This clause does not apply to gas and liquid fuel burning appliances.
- an imperforate ceiling diffuser or the like installed at the ceiling or internal lining level; or
- a weatherproof seal; or
- a shutter system readily operated either manually, mechanically or electronically by the occupant.
A roof light should be sealed regardless of which room it serves in climate zones 4, 5, 6, 7 and 8. For example, a roof light located in a hallway should be sealed to stop the transfer of cold air into adjoining conditioned spaces. This principle also applies to external doors and windows, exhaust fans, wall and floor junctions and evaporative coolers.
External windows and doors
- for the bottom edge of a door, must be a draft protection device; and
- for the other edges of a door or the edges of an openable window or other such opening, may be a foam or rubber compressible strip, fibrous seal or the like.
An exhaust fan is considered to be adequately sealed if it is fitted with a filter such as the type commonly used in kitchen range hoods.
Construction of ceilings, walls and floors
- enclosed by internal lining systems that are close fitting at ceiling, wall and floor junctions; or
- sealed at junctions and penetrations with—
- close-fitting architrave, skirting or cornice; or
- expanding foam, rubber compressive strip, caulking or the like.
- A close fitting internal lining system is considered suitable to include an allowance for minimum lining movement gaps at wall, floor and ceiling junctions.
- Caulking includes sealant, mastic or other gap filling material.
- In 13.4.6(2)(b), penetrations include windows, doors, roof lights , flues, exhaust fans, heating and cooling ductwork and the like.