Don't Neglect Drainage When Waterproofing

No waterproofing system I know of is designed to work without proper drainage. Without relief, water can build up tremendous pressure underground. A waterproofing manufacturer won't warrant its product if drainage is missing or inadequate, or if the structure is built on a site where proper drainage is impossible.

The minimum drainage for any building is a perimeter footing drain. Depending on conditions, some buildings will require an underdrain system or a sump pit with a pump.

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