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Waterproofing solutions

Basement waterproofing services, explained.

Compare every major method — how it works, when it is the right call and what it typically costs — then get matched with a specialist who does it well.

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Basement waterproofing services, explained.
Interior drain tile & sump pumps
01

Interior drain tile & sump pumps

The most common fix for water at the floor-wall joint. A channel is cut along the perimeter of the slab, perforated pipe is laid in clean stone and water is carried to a sump pump that discharges it outside.

  • Best for: seepage at the cove joint, finished basements, tight lots
  • Install time: 1–3 days
  • Typical cost: $45–$110 per linear foot
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Exterior excavation & membranes
02

Exterior excavation & membranes

The foundation is excavated to the footing, cleaned, repaired and sealed with a waterproof membrane, with drainage board and a footing drain to move groundwater away.

  • Best for: new construction, severe or structural water problems
  • Install time: several days to a week+
  • Typical cost: $120–$300 per linear foot
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Polyurea & spray-applied coatings
03

Polyurea & spray-applied coatings

Polyurea is sprayed as a liquid and cures in seconds into a seamless elastomeric membrane. It bridges hairline cracks, flexes with the structure and resists standing water.

  • Best for: foundation walls, floors, below-grade exterior work
  • Return to service: same day
  • Typical cost: $6–$14 per sq ft
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Crack injection
04

Crack injection

Polyurethane or epoxy resin is injected under low pressure until it fills the crack through the full wall thickness, sealing out water at the source.

  • Best for: isolated leaking cracks in poured walls
  • Install time: a few hours
  • Typical cost: $350–$900 per crack
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Foundation & retaining wall protection
05

Foundation & retaining wall protection

Below-grade waterproofing for retaining walls, additions and commercial foundations, combining membranes, drainage composite and proper backfill.

  • Best for: new builds, additions, retaining structures
  • Install time: varies by project
  • Typical cost: quoted per project
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Humidity control & encapsulation
06

Humidity control & encapsulation

Vapor-retarding wall systems, sealed sump lids and right-sized dehumidifiers keep relative humidity in the 30–50% range that stops mildew and musty odors.

  • Best for: damp air, musty smell, finishing projects
  • Install time: 1 day
  • Typical cost: $1,500–$6,000
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Budget it

Estimate your project cost.

1. Repair method

2. Basement perimeter

120 linear ft

Tip: a 30 × 40 ft basement has a 140 ft perimeter.

3. How bad is it?

4. Add-ons

Estimated project cost

$0–$0

    Planning range based on typical U.S. contractor pricing. Soil, access, depth and local labor rates move the final number — a free inspection gets you an exact quote.

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