Damp Proofing Portsmouth
Portsmouth is built on reclaimed marsh as much as brick and mortar, and its Victorian terraces bring damp problems all their own. We diagnose the real cause, rising, penetrating, condensation, or ground movement, and fix it with a survey-led approach backed by a written 10-year guarantee.
Book a Portsmouth Damp Survey
0300 373 7251Survey-led diagnosis with a clear, written report. No obligation.
Damp in Portsmouth Homes
Old Portsmouth and Southsea were built over the drained Little and Great Morass marshland, so many homes sit on shallow foundations, and rising groundwater here has led to subsidence and movement in places.
Fratton, Landport, North End, Buckland and Copnor are solid-walled Victorian and Edwardian terraces, so genuine rising damp is common where the original damp proof course has failed. Post-war patch repairs after WWII bomb damage add to the problem in these streets.
Cosham, Drayton, Farlington and Paulsgrove are largely 20th-century semis, where penetrating damp, condensation and sealed-shut trickle vents are the more usual culprits. Portsmouth's high water table also means basements and lower-ground flats often need proper waterproofing survey work. Whatever your property, the right starting point is always a damp survey.
Damp Proofing Services in Portsmouth
Whatever the property and whatever the cause, we cover it, and we link each job to the right specialist for rising damp treatment.
Rising Damp
Genuine rising damp in Portsmouth's older solid-walled terraces, confirmed by a survey and treated with a new damp-proof course where needed.
Penetrating damp
Penetrating damp through the render, bays, and poor pointing is the most common cause of damp patches in 20th-century homes in Cosham, Drayton, and Paulsgrove.
Condensation & Mould
Condensation and black mould in sealed-up flats and terraces across Southsea and North End, cured with ventilation rather than an unnecessary damp course.
Timber & Rot Treatment
Woodworm in the floor and roof timbers of Portsmouth's Victorian terraces and converted properties, treated at the cause.
Basement & Below-Ground Waterproofing
Structural waterproofing and tanking for basements and lower-ground flats affected by Portsmouth's high water table and known groundwater flood risk areas.
Damp Surveys
Independent, survey-led damp surveys with a clear written report, ideal for homebuyers and pre-purchase building surveys on Portsmouth's older housing stock.
Signs of Damp in Portsmouth Properties
If you're seeing any of these, it's worth getting the cause checked before it spreads:
How We Work, Survey to Completion
Book a survey
We arrange a convenient visit to your property, anywhere across Portsmouth and Portsea Island.
Diagnose the Real Cause
We use moisture readings and, where useful, thermal imaging to confirm whether it's rising damp, penetrating damp, condensation or ground movement, not guesswork.
Clear Written Report
You get a plain-English report setting out the cause, the recommended work and the costs, with an approach sympathetic to older terraced and reclaimed-land property.
Carry Out the Work
Our technicians complete the treatment tidily and with minimal disruption, leaving the property clean.
Written guarantee
Installed work is backed by a written 10-year guarantee, transferable on sale.
What Our Customers Say
Genuine reviews from Advanced Damp customers.
“So far, so good! Matt visited us and did a thorough inspection of our property. Totally professional in all aspects and easy to talk to. He talked through many options and sent a report and quotation within a few days. The staff we spoke to on the phone and via email couldn't have been more helpful. Really like this company and look forward to doing business with them in the future.”
“I recommend this Company for all aspects of Damp Coursing. All was explained professionally by the Surveyor, Sam.
I would also like to mention the outstanding cleanliness & housekeeping performed by Technician Matt. There was a lot of plaster to be removed from the landing, entrance, & living room, yet no dust or dirt was left at the end of the job.
Thanks again to everyone at Advanced Damp”
“We had damp proofing work carried out recently, and I’m really pleased with the service. The team was friendly and professional and explained everything clearly before starting. The work was done efficiently,y and the property was left clean and tidy afterwards. Communication was great throughout. I have waited the recommended drying time, and the issue now seems completely resolved.”
A Real Damp Proofing Project
Treating Rising Damp in a North West London Home
Our rising damp treatment successfully addressed moisture issues in this residential property, repaired the affected walls, and helped protect the home from future damp-related damage.
Areas We Cover Around Portsmouth
We cover Portsmouth, Portsea Island, and the surrounding area, including:
- Southsea
- Old Portsmouth
- North End
- Fratton
- Landport
- Buckland
- Copnor
- Baffins
- Milton
- Eastney
- Portsea
- Hilsea
- Cosham
- Drayton
- Farlington
- Paulsgrove
- Widley
- Anchorage Park
Nearby too? See our Welwyn Garden City and London damp proofing page or our Reading page.
Damp Proofing PortsmouthFAQs
Which parts of Portsmouth do you cover?
I have a damp Victorian terrace in Fratton or North End. Is it rising damp?
Does Portsmouth's reclaimed land and high water table affect rising damp treatment?
Can you treat damp in a converted Southsea flat?
How much does damp proofing cost in Portsmouth?
Is the work guaranteed?
Book a Damp Survey in Portsmouth
Get the real cause of your damp diagnosed by a specialist who understands Portsmouth property, from Victorian terraces in Fratton to reclaimed-land conversions in Southsea, with a clear written report and honest advice.