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Basement Waterproofing & Wet Basement Repair

Water on the floor after every heavy rain isn't something you have to live with.

  • Interior drain tile systems
  • Exterior foundation waterproofing
  • Wall vapor barriers and sealing

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Most basement leaks come from water pressure building in the soil around the foundation. Water finds the weakest points: the joint where the wall meets the floor, cracks, and pipe penetrations.

The most common permanent fix is an interior drain system. A channel is cut along the perimeter of the floor, drain tile collects the water, and a sump pump sends it outside. Exterior waterproofing, which digs down and seals the outside of the wall, is another option when interior work isn't a fit.

Sealer paint alone rarely holds back water under pressure. A local contractor will find where the water is coming from and recommend the right system for your home.

What a typical interior drain system involves

  1. A contractor inspects the basement and outside drainage to find where water enters.
  2. A strip of floor is removed along the walls and a perforated drain tile is set in gravel beside the footing.
  3. The drain is routed to a sump pit, and a pump discharges the water away from the house.
  4. New concrete is poured over the drain. Many systems add a vapor barrier on the walls.

What it costs

National cost guides put most whole-basement waterproofing jobs at roughly $3,000 to $10,000, and interior drain tile at $60 to $120 per linear foot. See our basement waterproofing cost guide for sources and what drives the price.

How water gets into a basement Cross-section of a house basement in wet soil. Water pressure in the soil pushes against the walls and up through the joint where the wall meets the floor. An interior drain tile along the footing collects the water and carries it to a sump pit, where a pump sends it out a discharge line away from the house. Water pressurein wet soil Water table risesafter heavy rain or thaw Interior drain tile Wall-floor joint Sump pitand pump Discharge linecarries water away
Most basement leaks are driven by water pressure in the soil. A common fix is an interior drain tile that collects the water at the footing and sends it to a sump pump.

Helpful guides

Basement Waterproofing near you

Frequently asked questions

Why does my basement leak only after heavy rain?

Heavy rain saturates the soil around your foundation and builds up water pressure against the walls and floor. That pressure pushes water through cracks and the joint where the wall meets the floor.

Is interior or exterior waterproofing better?

Both can work. Interior drain systems are usually less disruptive and less expensive. Exterior waterproofing stops water before it reaches the wall but requires excavation. A contractor can tell you which fits your home after an inspection.

Does waterproof paint fix a wet basement?

Usually not on its own. Coatings can help with dampness, but they rarely hold back water under pressure. Most active leaks need a drainage solution.

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