Avant Garde Damp Solutions Ltd

Mr Ben Sullivan

(261 Reviews)
Avant Garde Damp Solutions Ltd Logo
Approved member since 2008
Call01923 944780

Skills & expertise

  • Damp Proofer
    • Damp Investigation
    • Damp Survey
    • Dry Rot Treatment
    • Emergency Damp Proofing Service
    • Penetrating Damp Treatment
    • Rising Damp
    • Structural Water Proofing
    • Timber Treatment
    • Woodworm Treatment

Company info

Why choose us?

  • Members of Checkatrade since 2008 
  • Surveys carried out by fully qualified Property Care Association surveyors 
  • Verifiable work history 
  • Guarantees offered for all eligible damp proofing and timber treatments 
  • All chemicals and materials conform to British Standards 

We are leading damp specialists for both domestic and commercial customers throughout London and the South East. Properties we treat include domestic residences as well as commercial and historical buildings. We believe that taking a holistic view of your building is key to realising the cause of the issue, with the ultimate aim of providing a permanent long-term solution using more traditional building techniques.

Our services include:

Damp proofing

  • Treatment of rising damp 
  • Remedial injections 
  • Tanking of basement and cellars 
  • Rendering, (including horsehair and lime) 

Timber treatments

  • Woodworm treatment 
  • Dry rot treatment 
  • Wet rot treatment 
  • Suspended timber floor replacement 

Condensation and mould

  • Advice on condensation management and prevention 
  • Pacifier vent installation 
  • Installation of thermal insulation 

External work

  • Rendering 
  • Lime pointing 
  • Repair and replacement of render plinths 
  • French drains and pea shingle soakaways 

About Avant Garde

Our company was first established in 2003, and we became members of Checkatrade in 2008. We have over a decade of experience in damp proofing and have served thousands of satisfied customers in this time.

We have a skilled team of expert surveyors and technicians and use only the highest quality treatments. Additionally, we are Sovereign Approved Contractors and adhere to their strict requirements for workmanship and materials used. We offer a company guarantee for our treatments, including for dampness and timber issues such as dry rot.

Our success lies in our commitment to our customers and to providing the highest quality workmanship and service. From your initial enquiry through to the completion of a project, we provide friendly, personable service that stands us out from larger companies.

We offer survey appointments throughout the week and at short notice where possible. Contact us now by submitting a written request or call us directly to discuss your specific requirements.

We look forward to receiving your enquiry.

Contact details

Reviews Summary

Average score based on 4 reviews in the last 12 months
261 Total Reviews

The reviews below represent customers' views and not the views of Checkatrade

Quote Accuracy
(3 Reviews)

Customer Reviews



Verified Review

Very overpriced for an inadequate service. Best avoid as despite going back to Ben regarding issues he didn't want to know. It was a very simple job with a clear brief but failed to deliver on it. I specifically wanted one small corner thoroughly investigated and Avant Garde knew it could probe fully as I had planned further decoration and plastering in due course. I approached the company to relay my disappointment before leaving this review, but it was not resolved. Disappointed.

Score Breakdown








Location: MK17
Reviewed in: May 2023

Reply from Avant Garde Damp Solutions Ltd

The client instructed us to carry out a survey at her property, we advised her of our fee's and services which were agreed upon. We attended on time and despite not receiving timely payment of the survey invoice, we still provided her with our written report in good faith, including giving the correct plaster specification that she could give to her own contractor. After the appointment the client did not make any further contact with us to advise us of her issue, deciding instead to remain silent and withhold payment, we have a complaints procedure which they could have initiated but did not use. After our accounts made contact three months later requesting payment, finally she advised us of her complaint that we did not find an area of wet rot during our survey. We provided a non-invasive inspection and seeing as the wet rot was only revealed once her contractor had removed the timber skirting from the wall, it would have been impossible for us to know this during our visit without making damage. We do not have x-ray vision and unfortunately can't see what is on the other side of any woodwork that is fixed into place.


Reducing level of soil to the outside of the house and installing new air bricks

Verified Review

Ben reviewed a damp problem in an outside wall and went on to provide an overview of recommended work to the downstairs of the house. A plan was agreed and carried out quickly and with no fuss. So far (5 months on) the solution has worked and wall is drying out.

Location: TW9
Reviewed in: April 2023

Through damp survey and report

Verified Review

We received a damp survey by an alternative damp specialist company. Ben's Avant Garde survey was in a completely different league. From meeting Ben in person for the survey it is clear he is highly knowledgeable and honest. His objective was not to maximise the quote for Avant Garde but rather to set out clearly the issues and risks identified as well as those which should be monitored but do not require immediate action. The subsequent report provided was very detailed which was highly informative in enabling us to understand his recommendations and proceed confidently to book in the work.

Location: SL6
Reviewed in: November 2022

Damp proof work to the ground floor walls, internal and external

Verified Review

Excellent experience. We started with a damp report from Ben, and then agreed the scope of works. Ben visited the site 2 or 3 times prior to the job to answer questions. The work was done on time and completed promptly, and to a high standard. Very fair and honest team, as job progressed, Ben would advise if actually less work was required than originally estimated so I felt that I was paying for what was required. I would definitely use AG damp solutions again. Also 50% refund on price of original damp report if we progressed with the recommended work.

Location: KT2
Reviewed in: June 2022

Damp survey, various works including tanking, replastering walls, air bricks, French drains.

Verified Review

Great team to work with. Clearly explained the problems and what needed to be done. Left everything really clean and tidy afterwards.

Location: TW7
Reviewed in: April 2022

Rising damp plaster

Verified Review

Excellent professional job

Location: TW1
Reviewed in: February 2022


  • Domestic Work
  • Commercial Work


Works in

London and surrounding areas

Vetting Status

Fully Vetted Trade

Self Certified
Company Type
Ltd Company
Not Yet Checked
Checkatrade T&Cs
Approved member since 2008
Trading address verified
ID Checked
Checkatrade Standards
Company Status
VAT Registered
Company Type
Ltd Company
Business Owners
Mr Ben Sullivan
Insurance Details
Public Liability Insurance
Current: Self-Certified on: 30/03/2023
Insured By
Zurich Insurance PLC

Accreditations and Memberships

  • Sovereign: Certificate to study aspects of Timber Preservation.
  • Sovereign: Certificate to study aspects of the Installation of Damp Proof Courses into Existing Properties
  • Sovereign: Certificate on the Control of Substances Hazardous to Health (C.O.I.H.H) Regulations, for personnel who will be carrying out Assessments as part of those regulations.
  • Sovereign: Certificate to study the application of Sovereign Hey'di Cementitous Tanking Systems.
  • Sovereign Approved Contractors Certificate:Process in Timber Treatment 
  • Sovereign Approved Contractors Certificate:Damp Proof Installation 
  • Sovereign Approved Contractors Certificate:Chemical Damp Proof Injection
  • Sovereign Approved Contractors Certificate for Sovdrain Cavity Drainage Membrane System above ground level