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What changes the cost of rising damp treatment?
In Cheshire, the cost of treating rising damp depends on confirming that the damp really is rising from the ground, the length and thickness of wall affected, the method used, and how much plaster has to come off and go back. This guide prints no price, so start with a survey that finds the cause.
Last reviewed:What rising damp is, and what it is not
Rising damp is moisture from the ground soaking up into the base of a wall. GOV.UK guidance on damp and mould describes it as moisture from the ground that rises up through parts of the building in contact with the ground, such as walls and floors [S1]. It says rising damp is usually found in older properties and is often misdiagnosed [S1].
That last point matters for cost. Damp at the bottom of a wall is not always rising damp. It can be:
- condensation, from moist air meeting a cold wall
- penetrating damp, from outside through defects in walls, roofs, windows or floors
- a leak, from a pipe, a radiator, a bath or a shower
- bridging, where soil, paving, render or a path sits above the damp proof course
GOV.UK guidance describes penetrating damp as water that gets in from outside due to defects in the walls, roofs, windows or floors [S1]. Each of these has a different fix, and treating a wall for rising damp when the cause is something else costs money without solving the problem.
QuoteZila is starting in Cheshire, with Crewe, Nantwich and Sandbach among the first towns. This guide prints no price. It explains how rising damp is confirmed, the treatments available, what changes the cost, and what to ask.
Confirming the cause
Because damp is easy to get wrong, start with a proper survey. GOV.UK guidance says rising damp can be identified through visual inspection, but that chemical testing is the most appropriate way of confirming it [S1]. It also says rising damp is often due to defective damp proof courses and membranes [S1].
The same guidance says a damp surveyor should be able to carry out a damp survey, identify the root cause of the issue, identify which type of damp it is and advise appropriate remediation [S1]. It lists building surveyors and damp surveyors among the professionals who can help identify a damp problem [S1].
When you book a survey, ask:
- what tests they will carry out, and whether they include more than a moisture meter reading
- whether they will look outside for bridging, leaks, gutters and ground levels
- whether the survey is independent of any treatment they sell
- whether you will get a written report with the cause and the recommended work
A surveyor who also sells treatment can still be helpful, but an independent view is worth considering if the work is large.
Simple fixes to check first
Before any treatment, look outside at the base of the walls. Causes that need no chemical treatment can include:
- garden soil or a flower bed piled against the wall
- a path, patio or drive laid too high, above the damp proof course
- render or pebbledash carried down to the ground, bridging the course
- blocked or buried air bricks
- leaking gutters or downpipes soaking the base of the wall
- a dripping outside tap or overflow
Lowering the ground, cutting back render, clearing air bricks and fixing gutters can sometimes solve the problem on their own. Give the wall time to dry after a fix, before deciding whether more work is needed.
Treatments for rising damp
If a survey confirms rising damp, the main treatments are:
- Chemical damp proof course. A cream or fluid is injected into holes drilled along a mortar course near the base of the wall, forming a water-repellent barrier.
- Physical damp proof course. A membrane is inserted into a cut mortar joint. This is more disruptive.
- Replastering. Damp-damaged plaster is removed to a set height and replaced with a plaster or render system designed for walls with salts.
- Improving drainage and ground levels. Lowering outside ground, adding a drain or improving falls away from the wall.
- Breathable approaches for old walls. Older solid walls built with lime may be treated differently, with lime plasters and measures to let the wall dry out. Ask a surveyor with experience of older buildings.
Ask the surveyor or contractor why they recommend each part of the work, and what would happen if you did only the outside fixes first.
Listed and older buildings
If the house is listed, any work that affects its character may need consent. The Planning Portal says listed building consent is needed for alteration likely to affect a listed building's character as a building of special architectural or historical interest [S2]. It says it is a criminal offence to carry out work which needs listed building consent without obtaining it beforehand [S2]. Speak to your council's conservation officer before injecting walls or stripping historic plaster.
What changes the cost of rising damp treatment
| What is being priced | What makes it bigger or smaller | What to ask |
|---|---|---|
| Survey | Visual check, moisture readings or chemical testing | What tests are included and whether there is a written report |
| Cause | Rising damp, bridging, penetrating damp or a leak | What the cause is and how they confirmed it |
| Length of wall | One wall or the whole ground floor | How many metres of wall are being treated |
| Wall thickness | Solid or cavity, brick or stone | How the method suits your wall |
| Method | Injection, membrane, or outside fixes | Which method and why |
| Plaster removal | Height and area of plaster taken off | How high they will strip |
| Replastering | The plaster or render system used | Which plaster and drying time |
| Moving things | Kitchen units, radiators, skirting and sockets | Who removes and refits them |
| Decorating | Painting or papering after drying | Whether decorating is included |
| VAT | Whether the business is VAT registered | Whether the total includes VAT |
A business must register for VAT when its taxable turnover for the last 12 months goes over £90,000 [S4]. Ask whether each total includes VAT.
Disruption and drying time
Rising damp work is messy. Plaster comes off the bottom of walls, skirting boards come off, and furniture, kitchen units and radiators may need moving. If sockets are low on the wall, an electrician may be needed to take faceplates off and put them back. Do not take sockets apart yourself.
New plaster and treated walls need time to dry before painting or papering. Ask how long the contractor expects, and what paint is suitable for the first coat.
Guarantees and paperwork
Some damp treatments come with a written guarantee. Read what it covers, whether it is tied to the property or to you, and whether it depends on the company still trading. Ask whether an insurance-backed guarantee is offered and what it would cost to add. Keep the survey report, the quote and any guarantee together, because a buyer's surveyor may ask for them when you sell.
Rising damp in Cheshire
A damp proofing business or surveyor covering Crewe, Nantwich, Sandbach and the villages nearby will want to know where the damp is, how high it reaches up the wall, and whether the wall is inside or outside facing. Take photos of the inside and the outside of each affected wall, including the ground at the base.
Say roughly when the house was built if you know, and whether it has solid or cavity walls. Anyone in the UK can post a job or register a business on QuoteZila.
What to have ready before you ask for quotes
- photos of the damp patches, inside and out
- how high the damp reaches up the wall
- the length of wall affected
- what is outside: soil, paving, a path or a drive
- whether gutters or pipes nearby have leaked
- roughly when the house was built
- whether you want a survey only, or survey and treatment
How to compare damp treatment quotes
Check each quote for:
- The cause, and how it was confirmed.
- The length of wall and the method.
- The height of plaster removal and the replastering system.
- Who moves and refits units, radiators and skirting.
- Any outside fixes recommended first.
- Any written guarantee offered, and what it covers.
- Whether the price is fixed and VAT is included.
Citizens Advice says a quote is a fixed price, while an estimate is a rough guess, so you might end up paying more [S3]. It suggests trying to get written quotes from at least 3 different traders before you decide [S3]. Ask how long any guarantee lasts and what it covers.
Jobs you might post
These are examples, not taken from real job posts. "Damp at the base of the lounge wall, plaster crumbling. Please carry out a damp survey and advise." Or: "Survey confirmed rising damp on two walls. Please quote for treatment and replastering to the same specification." Or: "Damp patch near the front door. The path outside may be too high."
Get quotes for rising damp treatment
Describe where the damp is, how high it reaches and what is outside the wall, and add photos. Up to five matched local businesses can reply [QZ2]. QuoteZila is free for customers and local businesses [QZ1].
Honest status: QuoteZila is new. We're starting in Cheshire, beginning with Crewe, Nantwich and Sandbach, and growing area by area. Anyone in the UK can still post a job or register a business. How fast you get quotes depends on how many local businesses have joined near you. Businesses can register and receive jobs straight away. We don't check insurance, qualifications or registrations, so please check these yourself before you hire.
Posting a job is not open yet
See the damp proofing page, the plasterers page or the builders page. For mould from condensation, see the mould removal cost guide.
Official and public sources
QuoteZila is not affiliated with these organisations.
- Types of damp: GOV.UK: understanding and addressing the health risks of damp and mould in the home [S1].
- Listed buildings: Planning Portal: listed building consent [S2].
- Quotes: Citizens Advice [S3].
- VAT: GOV.UK on when to register [S4].
Questions about rising damp treatment costs
How much does rising damp treatment cost?
This guide does not print a price. The cause of the damp, the length and thickness of the walls, the method chosen, how much plaster comes off and goes back, and decorating afterwards all change the total. Get the cause confirmed before you compare treatment quotes.
How do I know if it is rising damp?
You often cannot tell by looking. GOV.UK guidance describes rising damp as moisture from the ground that rises up through parts of a building in contact with the ground, and says it is often misdiagnosed. It says chemical testing is the most appropriate way of confirming it.
What causes rising damp?
GOV.UK guidance says rising damp is often due to defective damp proof courses and membranes. It is also worth checking whether soil, paving or a path has been raised against the wall, bridging the damp proof course, because that can let ground moisture past it.
Is it rising damp or condensation?
They can look similar, and the fix is very different. Condensation forms when moist air meets cold surfaces, often in corners, behind furniture and on windows. Penetrating damp comes in from outside through defects. A damp survey should identify which type of damp you have before any treatment is chosen.
Who should carry out a damp survey?
GOV.UK guidance says a damp surveyor should be able to carry out a damp survey, identify the root cause, identify which type of damp it is and advise appropriate remediation. A building surveyor can also look at damp as part of a wider survey.
Do I have to replaster after rising damp treatment?
Often, because plaster that has been damp can hold salts brought up from the ground, which keep drawing moisture. Treatment often includes removing the damaged plaster to a set height and replastering with a suitable mix. Ask what plaster will be used and how long it must dry before decorating.
Does QuoteZila check the businesses who quote?
No. We don't check insurance, qualifications or registrations, so please check these yourself before you hire. You can report a quote or a business from your job page.
Related guides
- Damp proofing: surveys and treatment
- Plasterers: replastering after treatment
- Builders: ground levels, drains and brickwork
- All cost guides
Part of Cost guides. All services
Related trades
Cost guides
Related pages
- Mould removal: what changes the price. In Cheshire, mould removal depends on the cause, the extent and who does the work. No pound total is printed. Health points and hiring questions only.
- Block Paving: What a Square Metre Omits. Block paving is listed from £25 per square metre in the Federation of Master Builders guide of 21 May 2026. QuoteZila does not set prices.
Sources
- QZ1: QuoteZila product fact. QuoteZila home and jobs-for-tradesmen copy.
- QZ2: QuoteZila product fact. QuoteZila terms and matching notes.
- S1: Understanding and addressing the health risks of damp and mould in the home, GOV.UK (DHSC and MHCLG). Accessed 2026-10-30. https://www.gov.uk/government/publications/damp-and-mould-understanding-and-addressing-the-health-risks-for-rented-housing-providers/understanding-and-addressing-the-health-risks-of-damp-and-mould-in-the-home--2
- S2: Listed building consent, Planning Portal. Accessed 2026-10-30. https://www.planningportal.co.uk/planning/planning-applications/consent-types/listed-building-consent/
- S3: Before you get work done on your home, Citizens Advice. Accessed 2026-10-30. https://www.citizensadvice.org.uk/consumer/getting-home-improvements-done/before-you-get-building-work-done/
- S4: Register for VAT, GOV.UK. Accessed 2026-10-30. https://www.gov.uk/register-for-vat