Mould Removal & Prevention in Portsmouth & Southsea
Mould in a Portsmouth home is rarely just a cleaning problem. Proofterior find out why it is growing, treat it safely and fix the moisture behind it — with clear written reports that homeowners and landlords can rely on.
- ISSE accredited
- 25-year insured guarantee
- In-house specialist team
Book your complimentary survey
Tell us what is happening and a specialist will find the real cause and give you a fixed price to fix it. No obligation.
First, who's enquiring?
Genuine reviews from local homeowners
Over 200 verified reviews across Checkatrade, Google and Yell
“Excellent service from start to finish. The survey was thorough and professional, with honest, evidence-based advice rather than trying to sell unnecessary work. I came away with complete peace of mind.”
Alex Richards-Taylor
Google review
“Excellent service throughout. Ashton came out to look at an issue raised on a part-exchange survey and, rather than recommend expensive remediation, told me honestly there was nothing wrong with the wall. Great to have an honest discussion.”
Ian M.
BH16 · Damp Investigation
“Dylan and the Proofterior team were amazing. The report was incredibly comprehensive. Can’t recommend them enough.”
Sam Short
Google review
“Very pleased with the work on our living room and bedroom walls. Punctual, polite and friendly, and completed on time even though it was Easter week. Many thanks to everyone at Proofterior.”
Chris G.
BH20 · Penetrating Damp Treatment
“Dan was very thorough, professional and polite. Quick to respond and I would highly recommend.”
Malik R.
Yell · Quick & Professional
“The workmen were clean, pleasant and efficient and took just one day. The very next day we noticed a big difference with the damp issue. Many thanks.”
Nick Bennett
Google review
“Able to fit my job in for the next day and completed in a day as agreed. Not the lowest quote, but it comes with a 25-year guarantee, which I wanted — long-term peace of mind was vital.”
Alan M.
BH23 · Flat Roof Reseal
“Ashton was so friendly and informative. I’ve gone from worried to empowered — someone you can trust to do the right thing.”
Suzanna Furbank
Google review
“Really amazing service. Dan provided a really thorough damp investigation and a very helpful damp report. Very quick responses too.”
Paul A.
Yell · Damp Investigation
“Happy with the speed — a full flat survey within a week. They explained our options, the price was extremely competitive, and our tenants are pleased with their fresher, safer flat.”
Verified Customer
SP6 · Damp Proofer
“Dan provided a very professional service from start to finish. Very good communication and a first-class job.”
Mark H.
Yell · Professional Service
“Excellent service from start to finish. The survey was thorough and professional, with honest, evidence-based advice rather than trying to sell unnecessary work. I came away with complete peace of mind.”
Alex Richards-Taylor
Google review
“Excellent service throughout. Ashton came out to look at an issue raised on a part-exchange survey and, rather than recommend expensive remediation, told me honestly there was nothing wrong with the wall. Great to have an honest discussion.”
Ian M.
BH16 · Damp Investigation
“Dylan and the Proofterior team were amazing. The report was incredibly comprehensive. Can’t recommend them enough.”
Sam Short
Google review
“Very pleased with the work on our living room and bedroom walls. Punctual, polite and friendly, and completed on time even though it was Easter week. Many thanks to everyone at Proofterior.”
Chris G.
BH20 · Penetrating Damp Treatment
“Dan was very thorough, professional and polite. Quick to respond and I would highly recommend.”
Malik R.
Yell · Quick & Professional
“The workmen were clean, pleasant and efficient and took just one day. The very next day we noticed a big difference with the damp issue. Many thanks.”
Nick Bennett
Google review
“Able to fit my job in for the next day and completed in a day as agreed. Not the lowest quote, but it comes with a 25-year guarantee, which I wanted — long-term peace of mind was vital.”
Alan M.
BH23 · Flat Roof Reseal
“Ashton was so friendly and informative. I’ve gone from worried to empowered — someone you can trust to do the right thing.”
Suzanna Furbank
Google review
“Really amazing service. Dan provided a really thorough damp investigation and a very helpful damp report. Very quick responses too.”
Paul A.
Yell · Damp Investigation
“Happy with the speed — a full flat survey within a week. They explained our options, the price was extremely competitive, and our tenants are pleased with their fresher, safer flat.”
Verified Customer
SP6 · Damp Proofer
“Dan provided a very professional service from start to finish. Very good communication and a first-class job.”
Mark H.
Yell · Professional Service
Areas we cover near Portsmouth
Our specialists regularly work throughout Portsmouth and the surrounding neighbourhoods.
What drives mould in Portsmouth homes
A dense city, a lot of converted and rented homes and a damp maritime climate make mould one of the most common calls we get from Portsmouth.
Converted flats and HMOs
Terraces split into flats or shared houses in Southsea and Fratton have more people, more showers and more washing drying indoors than they were built for.
Solid brick walls
Older terraces have solid walls that are cold on the inside, so moist air condenses on them — especially behind furniture and in bay windows.
Hidden damp
Leaking gutters, failed pointing and rising damp in ground-floor rooms keep walls wet, giving mould a permanent food supply.
How we deal with mould in Portsmouth
1. Survey and readings
We record humidity, surface temperatures and moisture levels, and photograph everything for your report.
2. Safe remediation
Mould is treated with professional anti-microbial products, and contaminated materials are removed where necessary.
3. A lasting fix
PIV, humidistat extractor fans, insulated linings or damp repairs to stop the conditions that let mould grow.
Services we provide in Portsmouth
Every service is delivered by our own in-house team and backed by our 25-year guarantee.
Your local damp, mould & timber team in Portsmouth
Portsmouth has a large rented sector, and landlords are under growing pressure to deal with damp and mould quickly. Awaab’s Law already sets strict timescales for social landlords, and the government has said it will be extended to private renting. Our written reports, with photographs, readings and a clear cause, give landlords and tenants a record of the problem and how it was put right. Homeowners get the same thorough approach.
Built to impress, built to last
Diagnosis first
We identify the real cause before recommending any treatment. No guesswork, and never unnecessary work.
In-house specialist team
Vetted, Proofterior-trained specialists, managed by us from survey to completion. No compromises.
25-year guarantee
Every treatment is backed by our 25-year insured guarantee, giving you lasting protection and peace of mind.
Recent projects near Portsmouth
Real photos from Proofterior jobs in and around the area — surveyed, treated and finished by our own in-house team.
Covering Dorset, Hampshire & Wiltshire
Local knowledge, specialist expertise and lasting protection for the home you care about.
Everything you might be wondering
Yes. Every survey comes with a written report including photographs, moisture and humidity readings, the cause we identified and the work we recommend.
Awaab’s Law currently applies to social housing. The government has said it intends to extend similar requirements to the private rented sector, so private landlords are wise to act on damp and mould promptly. See our Awaab’s Law page for more detail.
Not if the cause is fixed. That is why we always deal with the ventilation, cold surfaces or damp behind the mould rather than just treating the stain.
No. Your initial property survey is completely complimentary and carried out with no obligation. A specialist visits your property, carries out a thorough assessment, and gives you clear, honest recommendations in plain English.
As a local, in-house team we are usually able to arrange a survey visit within a few days. Call us on 01202 287503 and we will book a time that suits you.
Get clear, honest answers about your home in Portsmouth
A qualified specialist will visit your property, carry out a thorough inspection and give you clear recommendations in plain English — everything explained in one visit, with no obligation.