This section of www.weathertight.org.nz provides information about construction practices that are important to weathertightness.

Find out more about:

• engineered openings and drainage paths – engineered gaps allow air into building elements to provide ventilation and drying, moderate air pressure and prevent transference of moisture. Drainage paths allow water that has penetrated the cladding, window or other detail to drain out. 
• walls – get information on installing wall underlay and scribing bevel-back weatherboards.
• flashings – read about stop-ends, minimum cross-falls and flashing upstands.