Endorsed by Which?

Avant Garde Damp Solutions Limited

4.9

92 Reviews

Opening Hours
Today - 09:30–19:00
  • Monday 07:30–19:00
  • Tuesday 07:30–19:00
  • Wednesday 07:30–19:00
  • Thursday 07:30–19:00
  • Friday 07:30–19:00
  • Saturday 09:30–19:00
  • Sunday - Closed

What is a Which? Trusted Traders Hertfordshire Trading Standards Approved Endorsement?

Which? Trusted Traders has partnered with Hertfordshire Trading Standards to create a Hertfordshire Trading Standards Approved endorsement. In addition to our standard trading standards assessment, this trader has had a DBS check and is subject to a Trading Standards intelligence check

About

Established in 2003, Avant Garde has treated hundreds of properties across the South East, including domestic, commercial and historical buildings. Treatments for woodworm, dry rot and rising damp have been carried out successfully, with no signs of re-infestation.

We hold full membership with Sovereign Chemicals, the gold standard in building products, and are governed by their strict requirements as to the quality of workmanship and materials used on all our contracts. Work completed by us will be guaranteed in accordance with our specialist reports, supplied to each client after our initial visit.

COVID-19 POLICY: We are continuing to provide our expert service throughout the restrictions. Our processes have been adapted to ensure social-distancing protection is adhered to for the safety of our staff and customers (Update May 2020) .This will be updated as and when new information is available.

Ben Sullivan m:07985616724 tel: 01923350193

http://www.checkatrade.com/AvantGardDampSolutionsLtd/

What we do

  • Damp proofing and timber preservation services

    • Timber treatment services
    • Injection damp courses
    • Tanking Systems
  • Plastering

    • Flat ceilings
    • Lime plastering
    • Rendering
    • Skimming
  • Tanking

  • Handyman and home maintenance services

  • More Services

    • basement refurb
    • cdm system
    • dry rot
    • woodworm
    • thermal wall

Customer reviews

Why you can trust these reviews

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100% of the reviews we publish have been through our stringent moderation process.

4.9
92 reviews
Customer Service
4.9
Quality
4.9
Value
4.9
Sort by
Damp treatment
Customer Service
Quality
Value
Avant Garde quickly identified the cause of damp in our front room and took immediate steps to rectify the problem both inside and outside the house. Their hard working team were highly skilled and friendly, were able to clearly explain the process, and took great care to keep the house as clean and impact free as possible. I would recommend this company to anyone with damp issues.
Customer in Buckinghamshire Posted on 30/11/2025 , work completed 14/11/2025
High quality work. Nice guys
Customer Service
Quality
Value
Ben's team did a big job of damp remediation at my residence. They also fixed some plaster that was in poor shape. He has a team of nice and professional guys. The work came out great and they got it done in good time.
Customer in Buckinghamshire Posted on 30/11/2025 , work completed 31/10/2025
Highly professional and High quality workmanship
Customer Service
Quality
Value
Ben and his team, from booking in to completing works were fantastic. Whole process was made easy, with quick & thorough communication, personable site visits to delivering high quality works. Bens team worked hard and diligently to deliver a great finish, and above all a solution to a damp problem that was pestering us for a while. Special thanks to Jimmy who was a star all the way through.
Customer in Buckinghamshire Posted on 30/10/2025 , work completed 27/10/2025
All work done to high standard and checked
Customer Service
Quality
Value
Ben and his team are very efficient helpful and kind, all work done was checked by Ben and any little niggles ironed out immediately, I can't recommend them enough
Customer in Berkshire Posted on 03/07/2025 , work completed 20/06/2025
Absolutely brilliant
Customer Service
Quality
Value
Ben and his team were absolutely brilliant! They were competent, punctual and carried out the work in the established time frame. Ben guided us through every step of the way giving clear information and reasoning for the work undertaken. His team were reliable and trustworthy and left the place clean. We were really happy with the result and we would be happy to recommend Avant Garde to family and friends.
Customer in Greater London Posted on 29/06/2025 , work completed 30/05/2025
Professional and effective damp treatment
Customer Service
Quality
Value
We employed Avant Gard to treat a damp problem we had on 2 walls. In addition we asked for some repair jobs to some historical problems we had with damaged walls. The team know their stuff and completed quite a lot of work in 3 days. The problem has, as far as we can see been resolved. The process involved an initial survey which is carried out prior to any work and then we were given options on the best treatment. Overall, a solid job and I would recommend
Customer in Hertfordshire Posted on 24/03/2025 , work completed 14/02/2025
Damp Proofing and treatment for woodworm
Ben and his team provided a realistic and competitive quotation against others received to undertake damp proof treatment to lower level rooms in a property built in 1893. He took the time to explain carefully the work being suggested, the materials to be used and how these would be effective in treating the damp issues that existed. The work was completed to the schedule that was stated. The team were very diligent in their preparation of the area, covering floors and furniture to ensure no damage was done as they worked. There was good communication and explanation as the work progressed. Very happy with the work done. Thanks Ben and your colleagues! Much appreciated.
Customer in Hertfordshire Posted on 06/02/2025 (Reviewer did not use service)
Damp problem surveyed, analysed and dealt with
Customer Service
Quality
Value
A damp survey was conducted thoroughly in the course of which we gained good advice. This was followed by a by a comprehensive report containing all the advice and more. We needed some work done so that our damp course could work; we also needed some internal work which involved stripping back one internal wall and re-plastering it. The work was carried out efficiently and to a good standard. We feel that our damp problem has been comprehensively and professionally dealt with. Communication was excellent, queries were immediately responded to.
Customer in Buckinghamshire Posted on 26/01/2025 , work completed 29/11/2024
Very knowledgeable and professional
Customer Service
Quality
Value
Ben was very thoughtful and considered to the damp problem we encountered. He explained the problem in detail patiently answering all of our questions. The report he gave us was detailed and the work was completed efficiently and to a high standard. They left the place spotless upon completion. An excellent company.
Customer in Greater London Posted on 24/01/2025 , work completed 24/01/2025
Excellent Service
Customer Service
Quality
Value
Avant Garde Damp Solutions undertook a site survey and recommended the installation of a French drain and the replastering of internal walls. The work was carried out and we are very happy with the work undertaken. 20 Year guarantee given on the work.
Customer in Greater London Posted on 21/01/2025 , work completed 11/11/2024
Damp work
Customer Service
Quality
Value
Ben came out and completed a review and very comprehensive report quickly and thoroughly, explaining the issues clearly and the work that needed to be completed. Avant Garde was able to start the job soon after this and completed the work well, quickly, and on time. The work was completed nearly 2 years ago and we have had no issues since.
Customer in Greater London Posted on 11/01/2025 , work completed 10/04/2023
Great Work completed on tight timetable
We had a couple of companies quote for the damp work that needed to be done as part of our kitchen remodelling. Ben from Avant Garde explained everything clearly and provided a detailed report. The quoted price was very competitive and Ben was able to work with us to get the job scheduled and completed on time and as promised. We were happy with the team (they were polite, friendly and tidy) and we have no reservations in recommending Avant Garde Damp Solutions to others.
Customer in Greater London Posted on 08/11/2024 (Reviewer did not use service)
Replacing rendering around windows
Customer Service
Quality
Value
I am very pleased at the works carried out AG Damp Solution Ltd to replace the rendering and pebbledash that had cracked and let rain in around the windows at my property. The works was done as agreed an on time. The workmen were punctual, efficient, considerate to my needs and very tidy. I have found the above company to be very professional and easy to deal with before, during and after completion of the work, and I would highly recommend them.
Customer in Greater London Posted on 30/10/2024 , work completed 25/10/2024
Excellent Work Force
Customer Service
Quality
Value
I had used Ben and his team before for damp in my home. This time it was for damp on 3 walls in a Church hall. They arrived on time, were very thorough and methodical in carrying out the work. Extremely pleasant and friendly guys. Very satisfied with the work they did.
Customer in Buckinghamshire Posted on 10/11/2023 , work completed 27/10/2023
Thorough, honest and professional survey - highly recommend
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. We are very grateful to Ben for saving us a huge sum compared to the less personalised and less specialised assessment from a competitor.
Customer in Berkshire Posted on 23/11/2022 (Reviewer did not use service)
Avant Guarde to the rescue!
Customer Service
Quality
Value
Ben and his team came to my rescue when I was let down by another company 4 days before they were due to start work on the damp at my house. Ben provided a very comprehensive report and the work which started 4 days ahead of schedule followed the recommended treatment of the walls exactly as per the report. The work was completed to a very high standard and I am more than happy wth the finished result. I found Ben and his team to be very hard working, (hardly ever stopped for breaks), considerate and polite. I would have absolutely no hesitation in recommending Avant Guarde Damp Solutions. Should also mention Chrissy in the office who was super efficient in dealing with reports, payments and general email correspondence. Thank you to a great team.
Customer in Buckinghamshire Posted on 14/10/2022 , work completed 07/10/2022
Wet Rot in ceiling joists
Customer Service
Quality
Value
A structural engineer inspection revealed that we had wet rot in the joists above our bathroom. They held up the floor of the flat above, so two properties were affected. We could not refurbish our bathroom until the problem had been treated. I rang round a number of firms. Some were very expensive; others did not return my calls. AG Damp Solutions did and appeared reasonable, even discounting 50% of the cost of the initial report if treatment was subsequently undertaken. I had been warned that some of the firms specialising in this area created unnecessary work and expense. Wet rot does sound scary and expensive, but AG Damp Solutions made an inspection and submitted a report within a week, reassuring me that the problem was not horrendous and that treatment would fix it. I had to find a contractor to expose a section of the joists and bolt on new joists to the old after a day's treatment by AG Damp Solutions. The work was done quickly and at a reasonable cost, with a guarantee. I would recommend this firm to anyone.
Customer in Greater London Posted on 22/03/2022 , work completed 28/02/2022
So impressed
Customer Service
Quality
Value
I had issues with damp walls for a while and contacted so many companies that firstly were charging a fortune just for the inspection and secondly they were very expensive. I then found Avant Garde which had lots of good reviews. I was very impressed with the work they have done. Firstly the report shared after the inspection was very detailed and that gave me a lot of confidence. Secondly, It is always a daunting experience to remove plaster and redo it and I thought it would be a nightmare to clean afterwards. But I have to say that not only the walls look so smooth now but the house was left spotless after the work. I am sure the damp issue has been sorted and I also got a 20 year warranty. I would highly recommend Avant Guard
Customer in Buckinghamshire Posted on 04/03/2022 , work completed 10/02/2022
Damp Proofing Work to bay internal & external window area and internal chimney
Customer Service
Quality
Value
I needed damp proofing work done to my front internal and external bay window and the internal chimney stack. This work included tanking, plastering, increased subfloor ventilation, and creating a French drain for added protection. The survey process was similar to the other companies we asked to quote, but the thing that stood out about Avant Garde was their attitude and the clarity with which they explained what work they recommended. The whole process was very simple, and they kept to time on all the work. The workmen were polite and very efficient, and it was reassuring to have Ben on-site to answer questions. The work on-site was backed up professionally and efficiently by Chrissy in the office. I would confidently recommend the Avant Garde team for their all-around knowledge, professionalism and quality of work.
Jeff in Hertfordshire Posted on 10/05/2021 , work completed 30/04/2021
Basement Flat Damp-proofing - short notice and cares a lot
Customer Service
Quality
Value
Ben and his team completed a damp survey and subsequently a damp proof course on my basement flat. I wanted it completed before I moved in and Ben managed to fit me in throughout January. Ben was very helpful from start to finish, from creating a very comprehensive damp survey report - through to completing the Damp Proof work that he quoted on. There were a few problems that Ben identified during the treatment, but he let me know immediately and explained the different options available to remedy them (the joys of old properties!). I'm happy with the end work, and Ben has even helped with questions that I've had since the work finished. Would recommend.
Customer in Greater London Posted on 03/03/2021 , work completed 22/01/2021
Very helpful and efficient solution to our damp problem
Customer Service
Quality
Value
Just as we put our house on the market we found that we had a big damp problem underneath the lounge floor that needed attention. Ben and his team gave us a competitive quote and then started work almost immediately. They kept us informed every step of the way and did a thorough job of getting rid of the damp and ensuring it wouldn't come back. They also helped with extra jobs such as the finished flooring and some electrical problems they found along the way. I would highly recommend this local company, because they clearly care about getting the customer back up on their feet again and putting everything in the house back in order.
Customer in Hertfordshire Posted on 29/12/2020 , work completed 11/12/2020
Avant Garde Damp Solutions
Customer Service
Quality
Value
Perceptive diagnosis of all damp issues with the flat including the discovery of considerable dry rot which had progressed into supporting ceiling beams etc. Contractors very helpful and considerate and carried out extensive work at short notice on a tight schedule. Workmanship excellent and recommended other specialists for necessary extra refurbishment work.
Customer in Greater London Posted on 04/12/2020 , work completed 03/07/2020
Very helpful advice on damp problem and work done to a high standard
Customer Service
Quality
Value
We had an issue with penetrating damp to several walls. Ben organised a damp survey and provided a clear plan of works. The works were completed within the timeframe provided and they were great at protecting the floors and clearing up afterwards. The bill was as in line with the estimate. Would definitely recommend to others.
Customer in Greater London Posted on 29/04/2020 , work completed 11/03/2020
Excellent work and on time delivery
Customer Service
Quality
Value
Not only the work was carried efficiently but they went the extra mile and worked on Saturday to deliver on time. Now my isolation issues are sorted for the next 30yrs (I hope!) Thank you!
Customer in Greater London Posted on 23/04/2020 , work completed 12/03/2020
Fantastic work from a knowledgable and trustworthy team
Customer Service
Quality
Value
Ben and his team were superb. Their survey was very detailed and helpful. It gave a clear picture of the work required to solve my damp problems. The communication from Ben via Email and phone was very quick. His work was carried out to a high standard and the re-plastered walls look great. I was fully informed throughout the process and am very satisfied with all aspects of their work. I highly recommend Ben and Avant Garde Damp Solutions.
Customer in Windsor and Maidenhead Posted on 07/04/2020 , work completed 12/02/2020