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Damp course cost guide

Damp is a huge concern for properties and something homeowners want to tackle straight away. This damp course cost guide will discuss what it is, what to look out for, and the average price of protecting your home from rising damp. Our aim is to give you a greater understanding of what to expect when it comes to tackling the unsightly must, mould and marks appearing along your walls.

What is a damp proof course?

Rising damp course cost to protect houseA damp proof course (DPC) is an essential part of a property that protects your home from moisture rising up from the ground (aka, rising damp). You can find it by checking the outside of your house and locating a seal that runs horizontally across the brickwork. It usually sits about 6 inches up from ground level.

This seal might not exist on homes built before 1875 – before a DPC became a compulsory building regulation. If that’s the case, you will need to invest in a damp course to avoid issues such as:

  • Reduced wall integrity
  • Aggressive mould stains
  • Damage to the floors of your home
  • Deterioration of plaster, paint and wallpaper

Damp proof course costs

Damp course costs are dependant on various factors, such as the extent of the damage and the size of the job. It’s worth hiring a professional to come and inspect your walls, check the existing damp course and diagnose the main issue.

Cost provided itemCost + VAT
(Lower range)
Cost + VAT
(Higher range)
Average cost
Terraced house£280£370£320
Semi-detached house£500£800£700
Detached house£1500£2000£1750
Labour costs£150£300£225

Once this is determined, there are three types of damp proof course available on the market:

  • Cream or liquid wall injections. The application requires holes to be drilled into your walls.
  • Mortar injections. The same as above, except, mortar is caulked into the holes. Used in homes with more internal wall rubble and those prone to voids.
  • Electroosmotic course. A non-chemical alternative using copper or titanium wiring to create a small electric charge that stops the water rising. It uses a scientific method to reverse the polarity of the capillarity, keeping the rising water below the level of the new damp course.

On average, damp course costs are around £800 for a medium-sized property.

Additional costs to consider

Although some tradespeople will include their labour in their damp proof course cost, expect to pay an average day rate of £225 for installation. That includes the tanking slurry, re-plastering and re-rendering required. A job of this magnitude can take between 1 and 4 days.

Find a local damp proofer near you

Damp course FAQs

Damp proof course cost for housesHow do I find a damp course?

Find your DPC by looking at your external walls. The damp course should sit 6 inches up from ground level. It will look like a think black line that runs horizontally across your walls.

Who should install a damp course?

Although people with the right skills can do it themselves, we always recommend hiring a professional builder to damp proof your home.

How long does a damp course last?

When done properly, a damp proof course can and should last for 20 years or longer.

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