Damp Proofer in London (43)

Here are the average prices of professional damp proofing in London:

• Damp proofing cost per metre – £50 – £75

• Damp proofing course – £500 – £5,000

• Damp proofing external walls cost – £750 – £4,000

• Damp proofing cellar / basement cost – £100 – £200 per sqm

• Injection damp proofing cost – £1,000 – £5,000

• Chemical damp proofing cost – £750 – £3,000

The cost of damp proofing a property is determined by the following factors:

• Type of damp

• Size of the affected area

• Damp severity

Read our damp proofing cost guide for a more detailed look at the most up-to-date prices. We recommend asking local tradespeople for a quote to receive an accurate price for your damp proofing project.

Here is a list of the most common benefits of damp proofing a property:

• Prevent structural damage – A damp proofing treatment can stop damp from damaging your property’s structure. If left untreated, damp can cause cracks, water damage and other structural issues

• Improved energy efficiency – Damp proofing can add an extra layer of insulation to your home and help you to keep energy costs down

• Reduced mould growth – Professional damp proofing will reduce the risk of mould growing inside your home

• Improved air quality – Damp can lead to the growth of harmful spores and mould. Damp proofing will combat mould growth and improve your property’s air quality

• Increased property value – Damp proofing will keep your home in good condition and provide protection against water damage in the future. A DPC or other damp proofing treatment will increase your property’s value and make your home more attractive to buyers

Signs that you need to damp proof your home include:

• Mould growth

• A musky smell

• Condensation on windows

• High humidity levels

• Damp patches (tide marks) visible on walls, around 1m from the ground

• Wet ceilings and walls

• Peeling wallpaper

• Cracking paint/plaster

• Rotting skirting boards

A professionally applied damp proofing course can last between 20 – 30 years. Poor installation and excessive wear and tear can cause the damp proofing to fail prematurely.

We recommend hiring an experienced damp proofer for the best long-term results.

Common damp proofing methods include:

• Damp proof membrane (DPM) – A thin damp-proof sheet is used to create a watertight barrier, preventing moisture from entering a property’s structure

• Damp proof course (DPC) – This method involves installing or injecting various materials (cream, plastic sheets, cement etc) into a property’s walls

• Integral damp proofing in concrete – This involves adding certain materials to the concrete mix, making the concrete itself impermeable

• Building a cavity wall – Interior walls are constructed and separated from the exterior walls by a cavity. This method successfully prevents moisture from reaching the building’s interior

• Damp proofing paint – Specialist paint can be used to provide a layer of damp proofing to your property’s walls and ceilings

Not all types of damp require the same treatment method. We recommend contacting a reputable damp proofer in London to discover the right treatment plan for your home.

The following factors determine how long damp proofing treatments take:

• Damp proofing methods used

• Size of the treated area

• Extent of the damp

• Property size

Chemical injection damp proofing can take between two – seven days to complete. A physical damp proofing installation typically takes around two weeks, depending on the size of the property. If a waterproof coating has also been added, this can add an extra five days onto your project.

We recommend asking for an estimated job time frame when contacting professional damp proofers in London.

There are DIY damp proofing kits available to buy on the market today. For the best long-term results, we recommend hiring a professional damp proofing technician instead. DIY damp proofing can be time-consuming and challenging if you don’t have the skills and tools needed.

Badly installed damp proofing can lead to water damage and other issues in the future. While simply improving ventilation can help with minor issues, a professional damp proofing treatment is the best option if you want to completely eradicate damp from your home.

Finding a reliable damp proofer in London doesn’t need to be difficult. Follow our expert tips to find reliable tradespeople near you:

• Ask people you trust for recommendations

• Read previous customer testimonials and online reviews

• Request quotes from at least three local tradespeople

• Ask about qualifications and experience – examples of qualifications achieved by damp proofing professionals in the UK include: Certificated Surveyor in Timber & Dampness (CSTDB or CSDB), NVQ Level 2 in Insulation, Building Treatments, or Damp Proofing, Specialist apprenticeship focusing on damp treatment

• Search Checkatrade

Only high-quality tradespeople can be found in the Checkatrade directory. We only approve damp proofers in London who meet our high standards and consistently pass our quality checks.