How Much Does Basement Waterproofing Cost?

Waterproofing a Basement: Costs, Methods & Essential Planning Tips

Noticing water seeping into your basement during heavy rain? It may be time to consider waterproofing to help protect your home and maintain its value. With solutions available from £100 to £10,000, understanding the costs is vital for budgeting. Read on for more.

In this Price Guide we will talk about:

1. Waterproofing a Basement
2. Waterproofing Based on Basement Size and Method
3. Professional Basement Waterproofing
4. Waterproofing Materials
5. Additional Costs
6. Connect with Suitable Damp Proofing Specialists on MyBuilder
7. Common Questions

Waterproofing a Basement: Cost Overview

Waterproofing a basement is essential to protect your home from potential water damage and maintain its structural integrity. Without proper waterproofing, basements can suffer from dampness, mould growth and even foundational issues.

The average cost to waterproof a basement ranges from £100 to £120 per square metre. This means that for different sizes of basements, the total project cost can vary significantly.

Method	Cost
Internal Tanking	£40 – £80/m²
External Tanking	£30 – £40/m²
Cavity Drainage Membrane (CDM)	£1,200 – £1,800 per system
Barrier Systems	£1,000 – £1,500 per system
Injection Damp-Proofing	£90 per metre

Before starting any waterproofing work, it’s worth having a survey done by a damp proofing specialist. Learn more in our damp survey cost guide.

Cost of Waterproofing Based on Basement Size and Method

Waterproofing a Small Basement (Up to 30 m²)

For a small basement, internal sealants are a cost-effective method, with prices ranging from £1,000 to £3,000. This approach helps to block moisture but may not be suitable for severe water ingress. Alternatively, external membranes offer more robust protection, costing between £3,000 and £5,000.

Waterproofing a Medium-Sized Basement (30 m² to 60 m²)

For medium-sized basements, using a sump pump along with French drains typically costs between £4,000 and £7,000. This method efficiently redirects water away from the foundation. For a more comprehensive solution, tanking a medium-sized basement can range from £5,000 to £9,000 depending on the complexity of the project.

Waterproofing a Large Basement (Over 60 m²)

Larger basements, due to their size and increased risk of water exposure, may require full waterproofing systems. These can cost between £9,000 and £15,000, depending on the specific waterproofing techniques employed. If the basement requires extensive external repairs, costs can rise, typically ranging from £10,000 to £15,000.

MyBuilder Tip: For related concerns such as timber damage caused by excess moisture, you may also want to explore dry rot repair costs.

Professional Basement Waterproofing: What Are the Labour Costs?

Labour costs for basement waterproofing vary depending on the complexity of the job. Simple tasks such as minor repairs or applying a basic waterproof membrane might incur lower costs. In contrast, more extensive work like digging external trenches or installing comprehensive drainage systems can be more expensive. On average, you can expect to pay between £100 – £200 per day for professional labour.

Consider these typical services provided by damp proofing specialists:

Item	Estimated Cost
Site Assessment & Preparation	£150 – £250 per day
Installation of Systems	£300 – £500
Transport Fees	£50 – £100
Maintenance/Repairs	£100 – £300
Regular Inspections	£50 – £150 per visit
Temporary Accommodation	Varies based on location & stay

Save money, energy and resources by hiring a professional to waterproof your basement; post your job today on MyBuilder to find available damp proofing specialists near you! Act now and ensure your project is handled efficiently and with peace of mind.

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Basement Waterproofing Materials: How Much Do They Cost?

Choosing the right waterproofing materials is key to protecting your basement from damp and water ingress. Costs vary depending on the product and its function, from simple sealants to more complex drainage and pump systems.

Waterproof Paint: This is applied to interior walls to create a moisture-resistant barrier, protecting against dampness. Expect to pay £30 - £50 per litre.

Sealants: Used to seal cracks, sealants prevent water seepage and protect the structural integrity of the basement. Costs range from £100 - £200 (bulk).

French Drain: A French drain system redirects groundwater away from the foundation, preventing water accumulation. Prices range from £50 - £100 per metre.

Sump Pump System: A sump pump system removes accumulated water, with complexity affecting overall cost. Expect to pay between £300 and £1,500.

Membrane/Tanking Slurry: This provides comprehensive moisture protection on walls, acting as a barrier against water ingress. Costs range from £100 - £200 per square metre.

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Additional Costs in Basement Waterproofing: Hidden Expenses

Basement waterproofing often involves more costs than meet the eye, making it essential to anticipate additional expenses. Ignoring these hidden costs might lead to budget overruns or incomplete projects.

Here are some typical additional costs you might encounter when waterproofing a basement:

• Repairs to structural damage: Unseen issues like cracks or damage can arise during waterproofing, requiring extra funds for repairs.
• Permits: Some locations require permits for extensive waterproofing work, adding to the project's administrative costs.
• Plumbing adjustments: Installing or modifying drainage systems might necessitate plumbing changes, resulting in additional labour fees.
• Utility relocation: In some cases, utilities might need relocating, which can significantly increase costs.
• Debris removal: Post-construction debris removal is often an overlooked cost, yet essential for project completion.

Need to hire a plumber for your project? Visit our price guide for all plumber costs.

Properly Protect Your Basement: Connect with Suitable Damp Proofing Specialists on MyBuilder

Is your basement in need of waterproofing? Don’t wait until it’s too late—find available damp proofing specialists near you with MyBuilder today. Post your job now and ensure your basement stays dry and protected for years to come!

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FAQ: Common Questions Readers Ask About Basement Waterproofing

Is DIY waterproofing an option, and is it cost-effective?

While DIY waterproofing can save money, it often requires specialised skills and knowledge. Mistakes can lead to further damage, so consulting with damp proofing specialists for significant issues is usually recommended.

What is the most effective waterproofing method for older basements?

For older basements, external waterproofing methods, such as applying waterproof membranes and ensuring proper drainage, are often most effective due to potential structural concerns and higher water exposure.

How long does the waterproofing process take?

The time required for waterproofing a basement can vary widely, depending on the project's complexity. Typically, it may take anywhere from a few days to a couple of weeks.

What maintenance is required after waterproofing my basement?

After waterproofing, regular maintenance includes inspecting the systems for wear, ensuring drainage channels are clear and monitoring humidity levels to prevent mould growth.