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UrgentCommon in SepRecommended trade: Damp Proofing Specialist

Wet Walls in Basement

Basement walls that are visibly wet, with water seeping through or condensation forming on cold surfaces.

What Is Causing This?

  • 1Hydrostatic pressure forcing groundwater through the walls
  • 2No tanking or waterproofing applied to the basement
  • 3Blocked drainage around the basement perimeter

How Urgent Is This?

Urgent

This needs prompt attention. Delaying could cause further damage, safety risks, or significantly higher repair costs.

What Needs to Be Done

A damp specialist will assess the water source and recommend internal tanking, cavity drain membrane systems, or external waterproofing depending on the severity and use of the space.

How Much Will It Cost?

£947 – £3,362

National average estimate

Labour: £577 – £1,887 | Materials: £370 – £1,475

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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.

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Planning Permission Guidance

Some fixes for this problem may require planning permission or building regulations approval. Check if your project needs permission:

Basement Conversion

Internal works to convert an existing basement or cellar are generally permitted as internal alterations. However, excav...

How to Prevent This

Ensure external drainage directs water away from the basement. Have tanking inspected periodically. Run a dehumidifier in the basement if needed.

Related Problems

Rising Damp on Ground Floor Walls

Damp and discolouration on ground floor walls, typically up to about one metre from the floor, with a tide mark.

Musty Smell in House

A persistent damp, musty, or earthy smell throughout the house or in specific rooms.

Other Damp Proofing Specialist Problems

Rising Damp on Ground Floor Walls

Damp and discolouration on ground floor walls, typically up to about one metre from the floor, with a tide mark.

Damp Patch at Bottom of Wall

A persistent damp area at the base of an internal wall, often with peeling paint or a musty smell.

Tide Mark on Walls

A horizontal line of discolouration or salt deposits running along the base of ground floor walls.

Musty Smell in House

A persistent damp, musty, or earthy smell throughout the house or in specific rooms.

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