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The waterproofing of roof decks has strong similarities to that of exposed balconies.

As it is for balconies, there are a wide variety of waterproofing methods that can be used. Firstly, the type of roof deck, the construction materials used, the location and environmental factors, size, design, construction details such as " at the junction of the deck and parapet/balustrade, and at the junction of the deck and wall/door openings" all have a bearing on the appropriate choice of membrane systems to be used. As far as we are concerned, in the vast majority of cases this will lead to a decision to use a multi-layer, modified bituminous sheet membrane system, complete with detailing peculiar to the chosen system. And of course there are other factors and extraneous matters that influence the decision.

Unfortunately, the use of systems that provide for period of time, a measure of water penetration protection, however are not robust enough, durable enough, or again last long enough (longevity), end up insitu on Sydney's roof decks, or for that matter this is an Australian wide problem. We have found that the chief reasons that less than optimum waterproofing is often used, is "the price", lack of "understanding or knowledge in relation to waterproofing" and "ease of application or installation e.g.. no special skills required". For the client to accept this lesser approach can be a serious case of "false economics" hence the many premature failures of roof deck waterproofing..