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New Buildings

Making sure a new house is weathertight begins with carefully evaluating the site. From there, it is important to understand and apply basic design principles and choose the appropriate materials, techniques and detail solutions.
Fixing Leaky Buildings

Making leaky buildings weathertight requires expert input. This is not work suitable for DIYers or builders or other practitioners who have no experience in weathertightness remediation. Careful assessment, planning and project management is essential.
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24 April 2023
Guidance for the building owner
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From the early 1990s, changes in design, materials, details and construction techniques led to weathertightness failures in thousands of buildings.
Knowing how water behaves can help you understand why some designs and details leak while others remain weathertight.
Following the design carefully on site and using the right techniques are just as important as getting the design itself right.
Regular maintenance, particularly of wall claddings, and keeping drainage and drying paths clear are key parts of ensuring a house stays weathertight.