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Estimated Cost Of Damp Proof Course

Are you interested in knowing what dampproofing costs?  

In this article, we will discuss all you must know about the damp course. We discuss the rising damp treatment and the damp proof membrane that is used for walls, and the price of conducting a damp survey.


How Much Is Damp Proving Cost?

What is the definition of dampproofing?

Damp Proof Course is an umbrella term that describes all of the ways to stop damp absorption into the structural components such as floors, walls, and floors of the interior of a home.

What happens If you don’t take care to take care to treat damp?

If you let damp sit for too long, it could eventually turn to rot, and cause physical damage to the home. This is why amp proofing is crucial. Any damp patches need to be treated promptly.

When a house is constructed in the first place, it’s usually built with a dampproof course that is built inside the walls.

What will happen when you engage an expert in damp proofing?

If you choose to hire an expert to waterproof your house typically, they’ll perform a variety of tasks like examine the walls, examine the damp course in place or plastering the walls, inject the walls with a water-proof liquid or render that is waterproof These are only some examples of the things that are typically included in the typical damp proofing job.

Damp Proof Course

How much will everything cost?

The typical cost to damp proof your home is around between £300 and £2500. But, the total cost that you’ll pay will vary based on a variety of aspects, such as the size of your home and its geographical location within the UK.

What is the price of tanking slurries set?

Tanking slurries are typically located in basements, but they can also be used on higher floors. If you needed an expert to come in for the application of a tanking liquid the typical cost would be between £30 to £60 per square meters.

Other dampproofing methods are available?

Another option to think about is having your walls plastered with a water-proof mix. The typical cost for this type of job is between £200 to £400 depending on the size of your room. based on the dimensions of the room as well as the location of your home in the UK.

How much time will damp proofing last?

Depending on the extent of work that is required damp-proofing could take anywhere between a day and one week to finish. Re-plastering is an messy task which is why it’s often a good idea for you to leave the premises as you get the job completed.

Prices for Damp Proofing

The table below that highlights the cost of the average cost for various types of damp proofing:

Damp Course – Terraced home£280-£370
Damp course house – Semi-detached£500-£800
Damp course – detached house£1500-£2000
Tanking slurry – Terraced home£2450-£3500
Tanking Slurry – Semi-detached House£2800-£3800
Tanking Slurry – Detached House£4560-£6000
Re-plaster – Terraced home£1200-£1800
Re-plasterer – Semi-detached home£1800-£2400
Re-plasterer – Detached home£2400-£3000

What are the supply costs for Damp Proofing?

There are only a handful of damp proofing methods you can carry out yourself. The majority of damp proofing tasks require to be handled by an expert contractor.

If you were looking to attempt DIY damp proofing, you might need the following materials:

  • Damp Proofing Injection Cream – £5-£7 per 100ml
  • Anti-mold/moisture/damp proofing paint – £25 per tub

If you’re employing a professional contractor to perform the task for you, they’ll typically use specialist materials. They will usually incorporate these materials into the cost of the project in general.

What are the additional costs of Dampproofing?

If you are considering dampproofing your home, you should be aware of extra costs you might be considering when doing the task. These extra costs can comprise items that will help to prevent the occurrence of damp from forming in the future or other things that could make the room more comfortable following the damp that has already been dealt with.

Below is a table of the average additional costs that you may need to consider with this type of work:

Extractor fan£150-£250
Roof leak repair£50-£100 per m2
Replacement gutters£480-£720
Window seals£50-£60 per window
Door resealing£80-£100 per door
New doors£50-£1500 per door
New windows£200-£350 per window

Costs to tradesmen for Damp Proofing

An experienced damp-proofer is likely to charge a per-day rate that ranges from £100 to £200. The length of time is required to finish the task will depend on many factors, including what size you have for your house as well as the scope of the work.

In light of these aspects the process of damp proofing could be anywhere between 1 and 5 days to finish.

Those based in London can also expect to pay more for labor costs than those based in other parts of the UK. If you are based in London, you can expect to pay an average of around £30-£70 more per day for labor.

How Do I Calculate the Time Damp Proofing take?

The amount of time needed to finish the task will vary based on the kind of damp proofing you want to do and the size of your house. The damp proofing course itself is usually completed in less than an hour. But, the contractor will need to put up a new plaster on the house and this could take several days to finish.

If tanksing slurry is required to eliminate damp, it will require a minimum of two days to finish as it requires a drying period of at minimum 24 hours between coats. If you’re having dry proofing paint sprayed on rooms of your house It can take about 6 to 12 hours per space.

On some more extreme cases, your home may need to be rendered to prevent damp. This can take around 4-14 days on average to complete depending on your home’s size.

Different types of Damp Problems

The rising of damp and penetration damp comprise three of the most commonly encountered kinds of damp that could be a problem for residential properties. Each kind of damp needs to be dealt with differently.

Here is a brief overview of the different kinds of damp that may be affecting your house:


Condensation is among the kind of damp found in homes throughout the UK. The type of damp caused by warm, humid air condensing onto walls that have a lower temperature. It is typically seen in areas that naturally create lots of moisture in the air like kitchens and bathrooms.

It is most often an issue during winter, as walls are more cold. But, it is an issue during summer also.

Central heating can often cause condensation damp problems. This is due to the fact that central heating gets very warm and then cools down again, causing warm, damp air that can lead to condensation. A lack of ventilation in the home can also make the problem worse.

If not treated the condensation could cause your door and window frames to deteriorate and cause damage to the plaster and paint on the walls. If you notice condensation developing within your home, clean it up.

Signs of condensation damp issues are:

  • Dark mold – particularly around windows and glass.
  • A sour scent of mold.
  • Droplets of water appear on windows or walls.

Rising Damp

The rising damp is caused by the rising of groundwater through the floor or wall. Walls naturally let some water to enter. However, this isn’t likely to cause harm due to a damp-proof course or damp-proof membrane.

Modern homes are more likely to contain damp-proofing courses as well as damp-proof membranes built in. This is why the rising damp can be more prevalent in older houses.

Rising damp can also become a problem when there is a lack of drainage or when the level of the ground outside your home sits higher than your damp-proof course as this will allow water to get above it.

Signs of rising damp are:

  • The wallpaper and paint start peeling, typically in wet areas.
  • The floor coverings can begin to rise.
  • Tide marks appear to appear to be rising up the wall.
  • The plaster is damaged.
  • Abrasions to skirting boards.
  • It is a white and powdery material on the wall caused by dissolving salts that are soluble.

Penetrating Damp

Penetrating damp is when water seeps into the walls. This kind of damp may extend across the ceiling as well as the walls. It usually occurs due to structural problems within the building.

If your house has cracks in the walls, ceiling or has issues with gutters or the roof it can result in pervasive damp. If structural issues are present in the structure of your home water can get through leaks or cracks, especially during rainy days. Damp penetration can also result from internal issues like leaky pipes.

Older buildings are more prone to penetrating damp than newer buildings as newer buildings are often built with cavities in the wall to protect against damp.

The signs of damp issues that penetrate can be seen in the following signs:

  • Dry patches on the wall can become darker if it rains.
  • Dry patches on the ceiling that may get darker when it rains.

Types of Dampproofing

There are a variety of methods that damp can be dealt with. Here are a few details about each method:

Damp Proof Course

Damp proof course (DPC) is a type of damp proofing that is installed within the property to stop damp issues from arising.

There are many different ways of installing damp proof courses, but the most popular method is to use a damp proofing injection.

A damp proof injection treatment involves the injection of a damp proof cream made up of a silicone-based liquid. This liquid reacts with the silica in the masonry to produce a layer within the wall that repels water.

Slurry for Tanking

Tanking slurry is a difficult job due to taking away all the paint, plaster, dirt and other debris off the wall. A salt neutraliser is put on the wall to keep any salts in the wall from impacting the tanking.

The wall is then dampened slightly, and holes are filled with cement, mortar, and a waterproofer. The wall is then dampened again before a tanking slurry is applied.

The wall must be left for 24 hours prior to applying another coat is applied. The wall can be painted and replastered after the second coat has completely dried.


If your walls require to be replastered, it involves applying the PVA layer first to ensure that the plaster dry out equally. As the glue becomes sticky it will be blended and then applied onto the wall.

Once the first coat of plaster is completed, it should then be left for 20 minutes before it is then skimmed and smoothed out, so there are no bumps. A second coat can then be added; however, this will be a much thinner coat than the first.

In order to finish the plastering process Water is then applied onto the surface in order to smooth any bumps there. Sanding paper will be employed to smooth and get rid of any extra plaster. After plastering is finished the wall can be painted again.

The benefits of Damp Proofing

There are numerous advantages to damp proofing the home. Below is a list reasons to damp proof the home you live in is highly suggested

Beware of Health Problems

Health problems can arise even if damp proofing isn’t done. Mildew and mould thrive in damp environments and mold can trigger various health problems, including headaches, wheezing coughing, throat and eye irritations.

The damp-proofing of your home can eliminate any ailments related to damp and ensure that your family is well-protected and safe.

Enhance the Look of Your Home

Damp build-ups may cause dark spots on your walls which can look ugly. The wallpaper may also begin to wilt and peel, and could cause wall to split.

Damp-proofing your home will ensure this doesn’t happen and you can decorate without the worry of any damp-related appearance issues.

Beware of unpleasant smells

In the absence of treatment for damp problems, they can cause unpleasant odors particularly when there is a large amount of mould in the home. If not treated the stench of mould and damp could take over your home.

If you choose to go through an process to treat dampness it will remove all damp odors that are present in your home.

Beware of reducing the value of your home

If you do not have your damp issues addressed professionally, they’ll continue to recur and become more severe over the course of time.

Damp could deter future buyers from deciding to purchase your house. Untreated damp is an effective way of putting off prospective buyers. If you have dampproofed your property, you will get rid of this issue.

Help to prevent structural Problems

If you leave damp areas untreated, they could cause harm to the timbers within the structural framework of your home. Damp could cause the wood of the structural timbers to decay and possibly collapse. A damp-proofed home can stop the possibility of rotting happening.


Q: What can cause the rise of damp inside walls?

A Groundwater movement creates a rise in dampness on the interior walls, which extends through the brickwork. This usually occurs due to leaks within the pipes inside the house. A rising damp treatment can assist in preventing further issues from happening.

Q What is the best method to cover a wall that is damp prior to painting?

A: You could seal your walls using damp-proof sealants or damp-proof paint. It’s an initial layer prior to you paint the walls for aesthetic reasons. Painting walls with damp proofing is a good way to prevent to prevent damp.

Q: What is the cause of damp in the walls of your home?

A: Damp is typically resulted from a build-up of water within the walls in your house. It may occur more frequently in places where moisture is present more often, for example in the bathroom or kitchen of your home.

Q: Is the rising damp covered by the insurance for your home?

A: Generally the rising damp issue is not included in your home insurance. However, each insurance policy differs, and it is best to check with your insurance provider to make sure.

Q: Can damp cause health problems?

If you leave damp untreated, it can cause a variety of health problems, such as wheezing and coughing and an irritation to the eye or throat. It could also lead to chronic health issues including a decreased breathing or asthma.


  1. https://www.which.co.uk/reviews/damp/article/dealing-with-damp/what-kind-of-damp-is-affecting-my-home-arNnf1P2wVnV
  2. https://www.petercox.com/our-services/damp-proofing/course
  3. https://www.mercianpreservationltd.co.uk/2019/01/23/what-are-the-advantages-of-damp-proofing-your-property



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