Waterproof decks – surface cracking, blistering, buckling or crazing

Cause

UV degradation

Repair

  • if there is a risk that the degradation may lead to leaks, contact a membrane installer/supplier to advise on replacing the membrane. Replacing a membrane is not a DIY job. Membrane manufacturers and suppliers typically train and license applicators in the use of their products. A warranty may only apply where application is carried out by someone licensed by the supplier.

  • where there is a habitable space beneath the waterproof deck, work on the membrane is restricted building work under the Building Act and anyone engaged to carry out this work must be a licensed building practitioner or supervised by an LBP

  • if you suspect that water has got into the building, engage an experienced building surveyor to look at this and advise on options

Cause

Expansion/contraction of substrate causing over-stressing and failure of the membrane

Repair

  • as for the first repair, but be aware that the substrate may need repairs or replacement before a new membrane can be applied over it

Cause

The material is at the end of its serviceable life

Repair

  • as for the first repair above