Flashing Laps

Laps in flashings should comply with the following criteria:

  • Water must flow over a lap, not into it,
  • a lap must not rely solely on sealant,
  • sealed laps must be mechanically fixed at 50 mm centres, and
  • end laps must be a minimum of 150 mm for unsealed laps and 100 mm for sealed laps.
Revision Category: 
4 - Clause Inserted
Revision Detail: 

Completely revised and shortened clause.

Draft Clause: