Waterproof decks – surface cracking, blistering, buckling or crazing
Cause
UV degradation
Repair
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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.
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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
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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
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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