Maintaining My Home

if the membrane was installed relatively recently – within the last few years – call back the original installer so the repair or replacement can be made by the contractor who carried out the original membrane application. If the problem is the result of faulty application, the repair should be made at the cost of whoever carried out that work. If the original applicator is no longer around, contact the manufacturer or supplier of the membrane to find another approved applicator

membrane manufacturers/suppliers typically train and license applicators in the use of their membranes. If repairs are made that are incompatible with the original membrane, the warranty may be void

significant repair work on membranes is not something suitable for DIYers and is especially not recommended when there is a living space beneath the waterproof deck and therefore potential issues with leaks and weathertightness

application or replacement of waterproof membranes is restricted building work. Where done by a tradesperson, it must be carried out or supervised by a licensed building practitioner

if the problems mean the existing membrane must be replaced, and it has not met minimum Building Code durability provisions applicable (15 years), a building consent will be required

where it is suspected that the membrane failure may have resulted in leaks and possible damage to framing below the deck, consult an experienced building surveyor for advice