Part A Structure
Part B Fire Safety Volume 1 all other types of buildings excluding dwelling houses.
Part B Fire Safety Volume 2 dwelling houses
Part C Site Preparation and Resistance to Moisture
Part E Sound
Part G Hygiene
Part H Drainage
Part J Heat Producing Appliances
Part K Stairways, Ladders, Ramps and Guards
Part M Access and Use Dwellings
Part L Energy Conservation
Timber Frame Construction
Building Energy Ratings
Energy Efficiency & Renewable Energy Systems
Acceptable Construction Details
Typical Inspection Reports
The masonry leaf of the external wall is often permeable to wind-driven rain and other elements and may allow the ingress of water. A ventilated and drained cavity between 40 mm and 60 mm thick is installed between the masonry outer leaf and the timber studwork to permit the escape of water and prevent the likelihood of condensation. It is important that the cavity width be properly maintained so that the performance of anchor straps, wall ties, etc. is not affected. Ventilation is achieved through the installation of proprietary vents installed into the perpends of the masonry outer leaf.
The proprietary vents are located at 1.5 m centres both at high level at the eaves/verge, and at low level below the DPC, where they also act as weep holes. It is for this reason that the cavity must be kept clear of debris from construction (e.g. mortar, timber). Proprietary vents located below the DPC level also act as weep holes.