No matter your experience with waterproofing membrane failure, waterproofing breaches are not so easy to spot. In fact, according to one article in The Construction Specifier, the most minor-looking of leaks could be a sign. Depending on where and how the waterproofing was installed, that can lead to costly excavation work for basements, vaults, tunnels, and water features. It can also lead to full removal or replacement of fixtures and finishes in certain spaces, such as commercial kitchens and lobbies.

Still, that’s why envelope engineers or other professionals conduct site visits before construction is completed, right? They make sure the external waterproofing membrane is placed properly and effectively to mitigate the risk and damage of a breach as much as possible.

That can certainly lead to a relatively long-lasting waterproof structure. But it’s neither the most risk-free nor the most sustainable solution. But what does that mean for your architectural work? What does the risk and reality of external waterproofing membrane failure mean for you?

Many architects like yourself are very familiar with external membranes. You know how to inspect and install them. You can physically see and touch them to sort them out before they’re covered. In short, there’s a sort of reassurance that comes with external membranes. You know they are actually there, and you know exactly what to do if any issues come up.

That comfort can be a detriment at times, however.

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