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Damp proofing specialists in Barnet

The 10 damp proofing specialists from Google's results for Barnet, ranked on Google rating, online presence and other factors. Updated 10 September 2026.

Damp survey
£175 – £350independent, not free
Injected damp course
£350 – £1,200per wall
Basement tanking
£2,300 – £6,000small cellar
Barnet vs UK
+16%well above the UK median

Number 1: Shield Preservation

5.0(23)out of 5, from 23 reviewson GoogleBarnet

Shield Preservation provides rising damp treatments, mould control, and cellar tanking in Bromley Common. The business works with homeowners and commercial property managers to repair and prevent damp problems.

0121 296 7907

Number 2: Basement Waterproofing Barnet

5.0(20)out of 5, from 20 reviewson GoogleLondon

Basement Waterproofing Barnet focuses on structural waterproofing and timber care across Barnet and North London. The team implements custom subterranean waterproofing systems to control moisture and transform below-ground spaces in domestic properties.

020 8959 6424 Churchill House, 120 Bunns Ln, London NW7 2DZ

Number 3: Olympic Preservation

4.9(45)out of 5, from 45 reviewson GoogleLondon

Olympic Preservation carries out damp surveys and fits damp proof membranes across London and Hertfordshire. The business addresses issues such as penetrating damp, mould, and timber rot. Its technicians install chemical damp proof courses to protect buildings against future water ingress.

020 8053 0269 9 Station Rd, London N3 2SB

Number 4: Damp & Mould Solutions

4.8(47)out of 5, from 47 reviewson GoogleLondon

Damp & Mould Solutions carries out damp proofing treatments and detailed damp surveys for properties across London. Their work focuses on identifying moisture problems and preventing mould growth throughout affected buildings.

020 4542 6114 3 Kendal Rd, London NW10 1JH

Number 5: Kenwood Damp-Proofing

4.3(749)out of 5, from 749 reviewson GoogleWatford

Kenwood Damp-Proofing performs damp proof course injections and basement tanking to address rising and lateral damp. Based in Watford, the team completes moisture remediation for both commercial premises and residential homes throughout the region.

020 8950 9070 9 Greenhill Cres, Watford WD18 8QU

Number 6: Preservation Treatments

3.9(17)out of 5, from 17 reviewson GoogleBelmont Rd, Camberley

Preservation Treatments resolves damp issues, woodworm infestations, and timber rot in domestic and historic properties across Camberley and London. Additional services include cellar waterproofing, structural resin repairs, and anti-condensation paint applications.

01276 66466 Belmont House, Belmont Rd, Camberley GU15 2NZ

Number 7: Tapco HomeDry

3.6(53)out of 5, from 53 reviewson GoogleThames Ditton

Tapco HomeDry carries out damp proofing, water damage restoration, and structural repairs for commercial and residential properties. Working from Thames Ditton, the team treats wet rot, dry rot, and woodworm while installing cavity wall ties, basement tanking, and condensation controls.

020 8398 6663 12 Thorkhill Rd, Thames Ditton KT7 0UE

Number 8: Barnet Homes

2.7(263)out of 5, from 263 reviewson GoogleLondon

Barnet Homes provides advice and guidance on managing condensation and mould for residents in London. The organisation helps householders identify whether internal damp stems from structural faults or insufficient ventilation.

020 8080 6587 2 Bristol Ave, London NW9 4EW

Number 9: London Damp Company

No Google reviews yetBarnet

London Damp Company undertakes structural waterproofing, cavity drainage installations, and plastering for properties in Croydon and London. Its scope of work also encompasses brick cleaning, repointing, and basement tanking projects.

Number 10: Jag Interiors Ltd

No Google reviews yetBarnet

Jag Interiors Ltd delivers rising damp remedies, mould control and wall protection for properties in Barnet and surrounding areas. Services include installing moisture barriers, repairing crumbling plaster and resolving internal condensation.

What damp proofing specialists charge in Barnet

In Barnet, damp survey typically costs £175 – £350. Labour in Greater London runs 16% above the UK median, which accounts for most of the difference from the same job elsewhere.

How to choose between them

  • Check the registration yourself. Trade body memberships are public, and each body's own register confirms them in a minute.
  • Get three quotes on the same specification. Written down, split into labour, materials and anything structural. Most people compare a total against a total and end up choosing between two different jobs.
  • Ask what is not included. Making good, waste removal, scaffolding and VAT are the four that turn a cheap quote into an average one.
  • Never pay a large deposit up front. Materials in advance is normal. Half the total before anyone turns up is not.

How this list is ordered

These are the firms from Google's results for "damp proofing barnet". They are ranked on Google rating, online presence and other factors.

Work out the budget first

The figures above are Barnet ranges. These explain what drives them, so you can read a quote properly.

Damp proofing specialists in Barnet: common questions

Is rising damp as common as damp proofing firms suggest?

No. Most diagnosed rising damp turns out to be condensation, a leaking gutter or a bridged damp course, none of which need injection. Pay for an independent survey from someone who is not quoting for the remedial work.