Tag Archives: Below-grade waterproofing

Waterproofing elevator pits 101

This was supposed to be simple. The site is flat and the building is all slab-on-grade. The geotechnical report stated the design ground water table is more than 3 m (10 ft) below grade. Why is there a need to spend in excess of $100,000, and add more than three weeks to the construction schedule for below-grade waterproofing? The short answer is: elevators.

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Quality assurance of waterproofing

For roofs, concrete assemblies, and mechanical systems, there is an established tradition of testing and inspection to verify both the material installation and construction meet the specified design criteria. Owners usually accept this without hesitation, and are ready to pay for the expenses.

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