Tom Silva applies hydraulic cement to a foundation wall
Photo: Joe Yutkins
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DIY Waterproofing

Minor leaks may not need the attention of a pro. "Often a few simple fixes will solve a moisture problem," says This Old House general contractor Tom Silva. His tips:

• Install diverters to send gutter water at least 10 feet from the foundation.

• Slope soil away from the foundation.

• Seal small cracks or gaps around pipes with concrete-patching compound.

• Fill larger cracks inside and out with hydraulic cement, which expands as it cures. A structural engineer should inspect any cracks that are wider than a pencil.
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