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Building Regulations and Other Guidance
Part A Structure
Part B Fire Safety
Part C Site Preparation and Resistance to Contaminants and Moisture
Part D Toxic Substances
Part E Sound
Part F Means of Ventilation
Part G Sanitation, hot water safety and water efficiency
Part H Drainage and waste disposal
Part J Combustion appliances and fuel storage systems
Part K Protection from falling, collision and impact
Part L Conservation of fuel and power
Part M Access to and use of buildings
Part O Overheating
Part P Electrical safety
Part Q Security
Part R Physical infrastructure for high-speed electronic communications networks
Part S Infrastructure for the charging of electric vehicles
Air Leakage
Regulation 7 Materials and Workmanship
Radon
Building Energy Rating: EPC
Energy Efficiency & Renewable Energy Systems
Timber Frame Construction
Acceptable Construction Details
Typical Inspection Reports
Ventilated cavities
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.