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Cool Cost For Basement Waterproofing References. Web the average cost to have a waterproofing company seal a standard basement is $5,500. Web on average, homeowners can expect to pay $5 to $10 (cad 6 to cad 12) per square foot for basement waterproofing costs.

Web the average cost to have a waterproofing company seal a standard basement is $5,500. Web many things can waterproof a basement, from mild damp proofing to full interior and exterior waterproofing. Therefore, a basement with a floor 5m x 4m and walls.