Blindside waterproofing systems are among the most difficult to design and install. These waterproofing and drainage systems are placed before the structural walls are poured, which means they must be installed over a soil retention system rather than concrete or masonry. That retention system—whether it be lagging beams, sheet pilings, shotcrete, or compacted native soils—is typically rough, uneven, and subsequently requires extensive detailing.
Additionally, blindside applications are usually part of massive projects that extend far below a water table where, in some cases, hydrostatic pressure can be extreme. Here, the workmanship must be flawless, as once the structural wall is in place, it is extremely difficult to repair any leaks that develop.
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