Early detection of strata building defects. It's time to abandon the Whack A Mole approach

NAT
Maintenance & Common Property
question
Lookupstrata community member

What is the incidence of pedestal paving hiding water issues beneath?

answer
Bruce McKenzie
Bruce McKenzie Sedgwick

The success of pedestal paving depends on elements beneath, including drainage, falls to substrates, membranes and upturns.

Pedestal paving has become more popular in the past 5-10 years, and our experience with water issues beneath is varied.

There is no specific Australian Standard yet that covers the paving installation. Therefore, installations rely on manufacturer recommendations combined with other standards such as waterproofing and drainage.

The success very much depends on elements beneath, including drainage, falls to substrates, membranes and upturns.

It can be a very effective product. I have seen some very good installations and some bad ones that have failed.

In instances where the substrate was incorrectly installed, issues have been undetected because they are not visible and difficult to access.

It is very difficult for building inspectors to check the substrate during a post completion inspection without lifting pavers. That becomes very time consuming and expensive for owners. For this reason, it can be a problematic area to regulate.

More often, I have seen blocked drainage due to build up where leaf and/or debris has fallen between joints.

Pedestal paving needs to be on a maintenance schedule where specific pavers are lifted above drainage points routinely so the paving can be inspected and cleaned.

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