Damp Proofing Cost 2024

Damp can cause serious problems in your property, from health issues caused by damp to structural issues caused by wood rot, it’s important to have damp treated.

The question on most people’s minds, though, is: How much does damp proofing cost?
Well, of course, the answer to this varies depending on a number of factors such as property size, cause of damp, type of damp and more, but as a general rule, the cost of damp proofing is around £150.00 – £200.00 per linear metre. For an estimate, use our Online Quote function.

With that said, we’ve put together a selection of the most common damp treatments with the average prices for a 20 square metre space

The Average Cost of UK
Damp Proofing Treatments

Allerton ALL DAMP DPC Gun
ALLDAMP Chemical Damp Proofing Cost

£40.00 – £75.00 per linear metre

ALLDAMP Damp Proofing Membrane Cost

£100.00 – £175.00 per square metre

ALLDAMP Damp Proofing External Walls Cost

£50.00 – £75.00 per square metre

Mockup-1-Membrane-Black (1)
ALLDAMP Basement Waterproofing Cost

£125.00 – £175.00 per square metre

ALLDAMP Render Additive Damp Proofing Cost

£100.00 – £150.00 per square metre

Keep the Damp Proofing Cost Low

When damp is spotted, it is important to address the issue immediately. The more time damp has to affect your home, the more expensive the treatment will be – this being the case with both rising damp and penetrating damp. It’s essential for you to get the damp problem dealt with as soon as possible.

What affects the cost of damp proofing?

Property age

Older properties are more commonly impacted by severe cases of damp. Due to the age of the property, damp works can take longer and use more resources to solve the issue. The quicker that damp is spotted and tackled, the easier it will be; therefore, the overall damp proofing cost will be lower.

The amount of damp

The extent of the damage caused by damp depends on how long it takes you to notice it. The damp might only be spotted once it has been there for a while, making it a much bigger issue. The quicker that damp is spotted and the less time it has been affecting your home, the cheaper the cost of damp works can be.

The type of damp

There are two types of damp – rising and penetrating – which require different types of treatment and therefore have different associated costs. Rising damp must be treated differently to penetrating as the moisture is absorbed into the wall upwards from the earth, rather than horizontally through walls. A correct Surveyor diagnosis is essential to figuring out the damp proofing cost.

Unique Requirements

When you get in touch with Allerton Damp, we’ll send over one of our friendly, qualified Surveyors. They’ll visit your property and inspect the damp to ascertain not only the type of damp with which your property is suffering, but also if your property has any additional unique requirements that impact the cost. This allows us to create an accurate quote.

Rising Damp

Rising damp is the gradual entry of water into a property by capillary action. In any circumstance where masonry meets the ground, it will come into contact with groundwater and rainwater, which it will absorb due to its porous nature. Due to typically high levels of rainfall, rising damp is a common problem in Yorkshire.
As the damp is absorbed by the masonry, it will rise via capillary action to a height of up to around 1.5m, unless it is prevented from rising by a damp proofing barrier; this is why effective rising damp treatment is essential.

Damp rising upwards on a wall


Penetrating damp can be destructive, and affects homes throughout Yorkshire. It describes the way in which moisture passes through (penetrates) walls horizontally, using capillary action to soak through the building materials. When you spot penetrating damp, it’s vital that you seek expert advice to keep your home in a good state of repair and those inside comfortable.

Penetrating damp is particularly an issue in cellars and basements as the walls are surrounded by earth, meaning they are in constant contact with moisture. However, this is not the only place penetrating damp can occur. There are different causes of penetrating damp, depending on its location in the home: broken or missing roof tiles and burst pipes in the attic of your property can cause damp spots to appear on your ceiling; damp appearing on your walls can be due to external wall defects such as cracks in external render or mortar.

Damp penetrating through a wall



Is Damp Proofing covered by Insurance?

The short answer is generally ‘no’, most insurance policies will not cover damp treatment or damp proofing. Buildings insurance providers generally classify damp as gradual deterioration, which isn’t typically covered in standard policies.

In some cases, your buildings insurance will cover the cost of damp repairs if it was caused by sudden damage such as a storm, leak or impact damage.

With this, it is important to use damp prevention solutions to preemptively stop damp before it causes serious damage and serious cost. If your property already appears to have damp issues, fixing the issue immediately could save you a packet.

Can you damp proof a wall without removing plaster?

Once damp has affected a wall, it is normally necessary to remove the wall plaster in order to remedy the damage. 1. The removal of these wall plasters is necessary for two reasons:
a) To allow for the installation of the damp proofing system; and
b) Because of the presence of the salt contamination. The ground and many building materials naturally contain salt; this salt is transferred by water (such as rising or penetrating damp) onto internal wall surfaces. If not removed, the salt will remain on the surface of the wall, attract and hold humidity from the nearby air, making the wall continue to appear damp, even if the source of the dampness has been cured.

Customers should beware of companies who are too quick to recommend only the installation of a chemical damp proof course as a method of repairing internal wall damage. This method is very rarely effective, but can still carry a significant cost.

Find Your Local Damp Proofing Specialist

Contact Us To Book A Survey

Whatever your needs, a member of our Customer Care Team will be happy to hear from you, this is our promise to you. They are trained in all areas of our work from damp repairs to cellar conversions and will aim to help you as far as possible at the initial stage. They’re friendly, approachable and they always have time to discuss your property needs.


©2024 | Allerton Damp Proofing Ltd is a Company Registered in England No. 2023575 | VAT Registration No. 381 4256 53 | FCA Registration No. 791947