Drained joint detailing is a well-known and effective way of achieving durable weathertight joints in building facades. The execution of drained joints at the intersection of panels and aluminium extrusions has, however, proved to be more difficult than a simple explanation of the theory of drained joints would suggest.
This guide is a digest of real leakage problems which have occurred in prototype testing or on finished buildings. It will bring designers face-to-face with leakage problems which have cost considerable money in the courts, or expensive delays during prototype testing.
The final chapter of this guide is a selected set of reference concerned with drained joint detailing. Particular attention has been given to references relating to building in Australia and New Zealand.