The Quick Fix
A tube of silicone or a builder replacing the waterproof membrane on your deck may appear to be an effective solution to your problem, but the 'quick fix' comes with risks.
You might only be addressing the symptom, not the cause. A leaking deck may be rectified by replacing the waterproof membrane, but if the deck was designed wrong (as is often the case) it doesn't matter how good the membrane is, is will still leak ina few years. Only have repairs done by someone who fully understands weathertightness design principles.- The fault may be 'systemic'. In other words, the design or workmanship that caused the leak may be used extensively throughout the house. A weathertightness expert will easily identify such systemic faults, and possibly prevent you from wasting money fixing small areas repeatedly when it would be more economical to carry out a full reclad.
- Repairs for weathertightness and durability issues require a building consent from the Council. Builders will try and convince you the repairs are just "maintenance", but don't believe them. If you don't have a Building Consent the Council have the right to ask you to tear down what you have built completely, or at least to a degree that allows them to inspect the construction.
- There is a legal risk. Any repairs carried out by a home owner are usually warrantied by a clause in the Sale and Purchase Agreement when the house is sold. If repairs fail, the next owner has the right to pursue the previous owner for compensation.
