Penetrating Damp Treatment in Dorset, Hampshire & Wiltshire
Penetrating damp is caused by water finding its way through the external fabric of your building — walls, roofs or around openings. Proofterior identifies the exact point of water ingress and resolves it at source, protecting your home with lasting, guaranteed repairs.
- PCA aligned & ISSE accredited
- 25-year insured guarantee
- In-house specialist team
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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
What is Penetrating Damp Treatment?
Penetrating damp occurs when water travels horizontally through walls, roofs or around windows and doors, rather than rising from the ground. It is usually driven by a building defect — cracked render, failed pointing, porous brickwork, a leaking gutter or downpipe, or defective flashing. Unlike rising damp it can appear at any height, and it often worsens noticeably after heavy or wind-driven rain. Effective treatment always begins with finding and fixing the source of the water.
The warning signs to look for
Catching the problem early keeps repairs simpler and less costly. If you notice any of these signs, it is worth booking a specialist survey before the damage spreads.
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- Damp patches that appear or worsen after heavy rain
- Staining on walls or ceilings at any height
- Damp isolated to one wall, often a weather-facing elevation
- Blistering paint or spongy, damp plaster
- Visible cracks in render or eroded mortar joints
- Water marks near windows, chimneys or roof junctions
Our treatment process
Every job follows the same careful, diagnosis-first method — so you know exactly what is happening and why at each stage.
Survey to locate the precise point of water ingress
Diagnosis of the underlying building defect causing the problem
Repairing the source — pointing, render, masonry, flashing or rainwater goods
Applying breathable water-repellent treatment or membrane where required
Re-plastering affected areas and issuing your guarantee
Penetrating Damp Treatment — from our recent projects
Real photos from Proofterior jobs across Dorset, Hampshire and Wiltshire — carried out by our own in-house team.
Included as standard
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
Our trained team handles every project from survey to completion. No subcontractors, no compromises.
25-year guarantee
Every treatment is backed by our 25-year insured guarantee, giving you lasting protection and peace of mind.
Penetrating Damp Treatment across Bournemouth, Poole & the South Coast
Need to fix damp in Bournemouth or stop water coming through a wall in Poole? Proofterior resolves penetrating damp at source right across Bournemouth, Poole, Christchurch and the Dorset coast, as well as Southampton, Portsmouth and Winchester in Hampshire and Salisbury in Wiltshire. Wind-driven rain off the South Coast is a common culprit here, so we trace the exact point of water ingress — failed pointing, cracked render or leaking rainwater goods — and fix the cause, not just the damage.
Covering Dorset, Hampshire & Wiltshire
Local knowledge, specialist expertise and lasting protection for the home you care about.
Everything you might be wondering
Penetrating damp can appear at any height and usually worsens after rain, while rising damp is confined to the lower wall and leaves a tide mark. Our survey confirms which you have before any work begins.
Always. Treating the internal damage without repairing the external defect only delays the problem. We resolve the source — pointing, render, masonry or rainwater goods — as part of the works.
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Get clear, honest answers about your home
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.