Below grade waterproofing is an application done on underground parking lots, basement and foundation walls, bridges and other structures that require waterproofing underground.

These systems come with a complete line of sheet and liquid applied membranes with accessory components, primers, sealants and adhesives.

The success of the below-grade building enclosure system, and selection of the components within the waterproofing system, depends heavily on site conditions and factors such as soil conditions, water table information and the construction process. Fluid-applied or sheet systems may be used, but the prevention of water infiltration is critical. Water allowed to enter will travel either under pressure or by capillary action to any and all points where it finds a path to enter the structure. Ground movement will only add to the problem, making leak detection and repair a challenge.

Fluid-applied systems are particularly attractive for this type of application because they allow no part of the wall to be left untreated or exposed to moisture penetration, even areas of complex detailing. In addition, the excellent flexibility, strength and adhesive characteristics of these systems enable them to bridge non-structural cracks, remain flexible at low temperatures and protect against water under hydrostatic pressure.

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