FREE SURVEYDamp proofing in Dorset & HampshireDamp, properly diagnosed and fixed for good.
Rising damp, penetrating damp, condensation or a wet basement: we find the real cause and fix it at the source, not just the symptoms.
- Free, no-obligation survey, inside and out
- We ring you back the same working day
- Written quote with no hidden fees
- Biokil and ProPERLA approved, manufacturer-backed guarantee
Book your free damp survey
We ring you back the same working day. Takes 30 seconds.
Thanks, we’ve got it.
We’ll ring you on the same working day to arrange your free damp survey.
- 1We call to find a time that suits you, usually within three working days.
- 2We inspect inside and out and find the cause of the damp.
- 3You get a detailed written quote, with no hidden fees and no pressure.
Need us sooner? Call 0330 133 1753.
Approved installers for
Your guarantee is backed by the manufacturer, not just by us.
- Fully insured
- Written guarantees
- 20+ years’ experience
Damp proofing, tailored to your home
No two houses have quite the same problem. We match the treatment to your home’s age, construction and the type of damp, so it lasts.
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Rising dampOur most common job
A chemical damp-proof course injected into the wall (or an electro-osmotic or physical DPC where needed), damp-proof membranes, then salt-resistant replastering.
How it’s fixed -
Penetrating damp
Rain getting in through the walls, stopped with repointing or a breathable, water-repellent ProPERLA wall coating.
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Basement tanking
Waterproof tanking systems that keep below-ground walls and cellars dry.
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Condensation control
Better ventilation and insulation to stop moisture building up indoors, and the black mould that comes with it.
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Buyer damp survey reports
A clear damp report before you buy, so you know what you’re taking on and can protect your investment.
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Numbers 1–5 match the five signs listed with this diagram.
- At 1.4 m
- 11%
- At 1.0 m
- 22%
- At 0.5 m
- 27%
- At 0.2 m
- 32%
Rising damp, up close
Is it rising damp? It usually looks like this.
Rising damp is water from the ground soaking up through the walls. It rarely climbs higher than about a metre, and it leaves a pattern we can read.
A tide mark up to about 1 metre
A wavy, brownish line that runs roughly level along the bottom of the wall.
White, fluffy salts
Salts carried up from the ground dry out on the surface. They also pull moisture from the air, so the patch never quite dries.
Blown or crumbling plaster
Plaster sounds hollow when tapped, flakes under the paint or falls away low down.
Damp or rotting skirting
Timber against the wall swells, stains and can start to rot. You may notice a musty smell.
It’s worst at floor level
Readings climb the closer you get to the floor. Leaks and condensation don’t follow that pattern.
Not every damp wall needs a damp-proof course.
Leaks and condensation cause a lot of the damp we’re called out to. So we check inside and out before we quote, find the real cause, and treat that. We don’t just mask the symptoms.
| Type of damp | Where you’ll see it | Tell-tale sign | What actually fixes it |
|---|---|---|---|
| Rising damp | Ground-floor walls, up to about 1 metre high | Tide mark and salts, with readings highest at floor level | An injected damp-proof course and salt-resistant replastering |
| Penetrating damp | Any height, usually on walls that face the weather | Patches that spread or darken after heavy rain | Repointing, or a breathable ProPERLA coating to keep the masonry dry |
| Condensation | Cold corners, behind furniture and around windows | Black mould spots, worst on winter mornings | Better ventilation and insulation, not a damp-proof course |
We treat all three. Whatever your survey finds, we’ll explain it plainly and quote for the fix that actually works.
From first call to a dry wall
Four steps, with a written price agreed before any work starts.
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Usually within three working days
Free damp survey
We inspect your property inside and out and diagnose the type and severity of the damp.
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No hidden fees
Report and written quote
A detailed report with our treatment recommendations and a clear price, so you know the process and the budget before you commit.
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Starts within 7–10 days
Tailored treatment
A chemical DPC, membrane, tanking or breathable wall coating, whatever the cause needs. Most rising damp courses take 1 to 3 days to install.
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Backed by the manufacturer
Guarantee and aftercare
Manufacturer-backed guarantee paperwork, plus ventilation and insulation advice and a follow-up to keep your home dry for the long run.
Drag across the photo to compare.
Recent job · Wool, Dorset
A thatched cottage, dried out properly
Damp-stained walls on an old cottage. We treated the damp at its source, then made good the stained walls and redecorated with a fresh plinth.
- Breathable, conservation-friendly materials
- Suitable for heritage and listed homes
- Cause treated, not just covered up
Guide prices, before anyone visits
Every home is different, so your survey ends with a detailed written quote. These figures give you a fair idea first.
Damp survey
Inside and outside inspection, readings and recommendations.
FreeDamp-proof course injection
Chemical DPC injected into the mortar course.
from £75per metre of wallSalt-resistant replastering
Damaged plaster removed and walls replastered to at least 1 metre.
from £45per m²Penetrating damp, tanking and condensation
Depends on the cause and the size of the area.
Quotedafter the free surveyTypical rising damp job: front room of an older terrace
About 8 metres of wall, injected and replastered.
£1,400–£2,200all inWhat you can count on
- A detailed written quote, with no hidden fees
- Biokil and ProPERLA systems, fitted by approved installers
- Manufacturer-backed written guarantee
- Old plaster and waste taken away
- Aftercare advice so the damp doesn’t come back
Prices are a guide for typical walls. Your exact price is confirmed in writing after the free survey.
Get my free quoteWhat local homeowners say about Charlie and the team
Rated 5.0 out of 5, Based on 54 Google reviews
5.0 out of 5 on Bark, 60+ reviews · Bark Certified Pro
“Mum and I have no hesitation in recommending this company to anyone. Charlie and his team were amazing to deal with from start to finish.”
“Charlie and his team did an excellent job at my house. They were very polite and nothing was too much trouble for them.”
“I was very impressed with Roofing & Insulation Services. They provided an excellent service. Good communication with regards to visits.”
“After being pushed from pillar to post by another company, Charlie came to look at a leak I had in my roof during heavy rainfall. Charlie turned up as promised.”
“I called and spoke with Charlie as I needed advice about some broken roof tiles. Really helpful and polite, great customer service.”
“We got Charlie and his team to do our roof as our house is going on the market, we are so impressed with how organised and quick the process has been.”
Reviews from homeowners across all our work in Dorset and Hampshire.
Book my free surveyDamp proofing in Dorset & Hampshire: the key facts
Everything you need to know before you book, in one place.
Last updated
- Company
- Roofing & Insulation Services Ltd, local damp proofing, roofing and insulation specialists with over 20 years’ experience
- Areas covered
- All of Dorset and Hampshire, including Poole, Bournemouth, Christchurch, Weymouth, Dorchester, Bridport, Swanage, Southampton and Portsmouth
- Damp treated
- Rising damp, penetrating damp, condensation and mould, wet basements and cellars
- Treatments
- Chemical, electro-osmotic and physical damp-proof courses, damp-proof membranes, salt-resistant replastering, repointing, ProPERLA wall coatings, basement tanking, ventilation upgrades
- Damp survey
- Free, with no obligation
- Callback
- The same working day, Monday to Saturday, 8am to 6pm
- Start date
- Usually within 7–10 days of the survey
- Installation time
- Most damp-proof courses take 1–3 days
- Guarantee
- Written and manufacturer-backed, as approved installers for Biokil and ProPERLA
- Reviews
- 5.0 out of 5 from 54 Google reviews
- Phone
- 0330 133 1753
Damp proofing questions, answered
Something else on your mind? Ring us for friendly advice and straight prices, with no obligation.
Call 0330 133 1753What is rising damp?
Rising damp is groundwater soaking up through the bottom of a wall because there’s no working damp-proof course to stop it. It usually shows as a tide mark up to about 1 metre high, with white salts, blown plaster and damp skirting boards below it.
How do I know what kind of damp I have?
The pattern usually tells you: rising damp stays low on ground-floor walls, penetrating damp appears after rain at any height, and condensation shows up as black mould in cold corners and around windows. Because they can look alike, our free survey checks inside and out to confirm the real cause.
How much does damp proofing cost in Dorset and Hampshire?
The damp survey is free. As a guide, a chemical damp-proof course costs from about £75 per metre of wall and salt-resistant replastering from about £45 per m², so treating rising damp in the front room of an older terrace typically costs £1,400 to £2,200. You get a detailed written quote, with no hidden fees, after the survey.
Is the damp survey really free?
Yes. Damp surveys are free and there’s no obligation to go ahead. If you’re buying a home and need a formal buyer’s damp survey report, we’ll tell you the cost upfront.
What’s included in your damp proofing service?
Everything from the first survey and diagnosis to a treatment plan and the damp-proofing system itself, whether that’s a damp-proof course, membrane or tanking. We also give you aftercare advice so the damp doesn’t come back.
How soon can you start, and how long does treatment take?
We usually start within 7 to 10 days of the survey. Most damp-proof courses are installed in 1 to 3 days, though replastering and drying out take a little longer.
Can you treat older, heritage or listed homes?
Yes. We regularly work on older Dorset properties, including thatched cottages, using breathable materials and conservation-friendly methods so your home still looks the way it should.
Is damp proofing work guaranteed?
Yes. We’re approved installers for Biokil and ProPERLA, so your treatment comes with a written guarantee backed by the manufacturer as well as by us. We’re also fully insured.
Do I need a damp survey before buying a house?
If the mortgage valuation or homebuyer survey mentions damp, yes. A specialist damp survey tells you the cause and the cost of putting it right before you commit, and we provide buyer damp survey reports across Dorset and Hampshire.
Which areas do you cover for damp proofing?
All of Dorset and Hampshire, including Poole, Bournemouth, Christchurch, Weymouth, Dorchester, Bridport, Swanage, Southampton and Portsmouth. Not sure if we reach you? Give us a call and we’ll tell you straight away.
Local damp specialists across Dorset & Hampshire
From Weymouth to Portsmouth, we survey and treat homes right across both counties. Not sure if we reach you? Ring us and we’ll tell you straight away.
Find out what’s really causing your damp.
Free survey, honest advice and a written quote. No obligation, no hidden fees.