Damp Proofing Specialists Since 1951

Damp is a common problem in many properties across the United Kingdom, causing serious damage such as peeling paint, damp patches, mould growth, timber decay and structural problems.

If your home is showing signs of damp, you may require damp proofing. Peter Cox provides professional damp proofing services across the UK, with specialist surveyors who can identify the underlying cause of damp and will recommend the appropriate treatment.

The most important step is to understand what is causing the damp problem, and the extent of any damage.

Because the type of damp will affect what sort of damp proofing is required, it is important for a qualified professional to fully assess the property, and provide recommendations on next steps. Sometimes damp proofing is not required at all, and simple repairs can prevent the problem.

Peter Cox have a number of qualified surveyors who can carry out a survey, and provide recommendations for damp proofing, if treatments are required.

All damp proofing is tailored specifically for your property, as no two properties are the same. Typically our damp proofing is backed by long term guarantees, up to 20 years.

Damp proofing is the process of controlling moisture from entering from the outside of the property or managing moisture created inside from penetrating walls and floors, therefore protecting a property from the damaging effects of excess moisture.

If left untreated, damp can lead to structural issues, timber decay, and health problems.

At Peter Cox, our trained and experienced damp experts assess the cause, whether it's rising damp, penetrating damp or condensation, and recommend effective damp proofing solutions.

The type of damp will determine the type of treatments required, so accurate diagnosis is the most important step when carrying out damp proofing.

Typically damp proofing includes the installation of a chemical damp proof course for rising damp, the fitting of damp proof membranes for penetrating damp from high ground levels or improving the thermal efficiency of walls and increasing ventilation for condensation.

Our professional service from the initial damp and timber survey to remedial damp proofing ensures long-term protection for your property.

If you are concerned about a damp problem, or think you require damp proofing, get in touch with Peter Cox and a surveyor local to you can confirm the presence of damp, and provide you with next steps.

The key signs you may require damp proofing include musty smells, peeling paint, black mould, or visible staining on surfaces. Sometimes damp problems will cause damp tide marks with salty deposits to form on walls, up to a metre above skirting board level. If left, damp problems can also cause skirting boards to become rotten.

If you’ve noticed any of these, you may require damp proofing. The first step is for a professional to confirm the type of damp and provide advice on how to stop the problem at the source.

 Explore signs of damp and the treatment processes involved.

Rising damp occurs when moisture from the ground moves upwards through porous building materials such as brick and mortar. This usually happens when the original damp proof course (DPC) is missing, damaged, or has deteriorated over time.

The height that rising damp can rise up a wall will depend on how wet the ground is, the pore structure of the masonry and the amount of evaporation, but on average the tide line will be around one metre.

Common signs include discoloured or flaking plaster, tidemarks on walls and a musty smell. Without treatment, rising damp can weaken the structure of your property.

Often a damp proof course has become bridged, and simple fixes may be carried out, rather than the need for remedial damp proofing. If rising damp is confirmed and there is no damp proof course, a chemical DPC can be installed.

Often plasterwork is contaminated by salts from the ground, so the replastering of damp walls may be required. This is because these salts can be hygroscopic, which means they pull atmospheric moisture into the wall and continue to cause damp patches even though a damp proof course has been installed. Salt resistant plaster must be used to prevent the problem.

Penetrating damp is caused by water entering your home through walls, roofs or windows, typically due to damaged brickwork, blocked gutters, or defective pointing. It is commonly caused by building defects, so can often be prevented by regular maintenance.

Penetrating damp will often appear as a damp patch that will worsen during periods of rain, which can cause plaster to deteriorate and even lead to mould growth forming. Salts from the ground or building materials can appear on the surface of walls affected by penetrating damp.

Remedial repairs may be required to prevent the problem, and if the problem is caused by building defects, these can simply be repaired by a reputable local builder. Unlike rising damp, penetrating damp can occur at any height and in isolated spots.

High external ground levels can also cause penetrating damp to internal spaces, in which case elements of structural waterproofing using membranes may be required.

The source of the damp causing the problem must be identified to prevent the problem returning, so external investigation is key to diagnose penetrating damp.

Condensation forms when warm, moist air comes into contact with cooler surfaces like windows and walls. This leads to water droplets forming, which can cause black mould, peeling wallpaper, and damage to paintwork. It's most common in bathrooms, kitchens, and bedrooms.

Our surveyors will use specialist equipment to understand the causes of condensation in your property, and will provide you with tailored solutions such as positive input ventilation (PIV) systems to manage internal humidity and improvements to the thermal efficiency of walls through methods such as thermal plastering, and loft insulation.

If you are concerned you may require damp proofing, the first step is to have a professional surveyor assess the condition of your property, to identify the root cause of any damp problems.

They will conduct a damp survey, which is used to check the health of your property and identify any problems that could affect it, both externally and internally.

They will also check the condition of timber throughout the property, as dampness can cause wet rot, dry rot and woodworm, which can cause timber to lose its structural integrity

Buildings across the United Kingdom are affected by different types of damp. To prevent long lasting damage you may require damp proofing.

Peter Cox offer a full range of damp proofing services which are delivered by experienced technicians, local to you.

After a thorough inspection to confirm the type of damp, we can provide targeted treatments to eliminate any problems identified and prevent future issues.

For effective and long lasting treatments, it is important to first have a damp and timber survey conducted before damp proofing can commence. This will ensure the correct damp proofing treatments are specified, giving you long term peace of mind the problem is solved.

Typically the process will involve:

• A comprehensive damp inspection by a qualified surveyor, who will inspect your property both internally and externally.
• They will take the time to come to the correct diagnosis of the damp type and severity.
• The condition of timbers will be assessed to ensure they are structurally sound, and no damage has occurred.
• You will receive a detailed report with the surveyors findings, and where necessary the recommended damp solutions. If applicable, details of the long term guarantee will be in your survey report.
• If you choose to go ahead with treatments, our technicians will stop the source of the damp, and carry out targeted treatments as per the specifications detailed in the survey.
• Where required, elements of timber repairs, improvements to ventilation and replastering will be carried out.
• To minimise disruption and dust, our technicians are equipped with floor coverings, dust sheets and vacuums. They will also use Hilti dust extraction units which help remove airborne dust from the atmosphere while hacking off salt contaminated plaster, drilling or cutting timber.
• They will then carry out final checks to ensure success, before you are issued any long term guarantees.

If you are concerned about a damp problem in your property, Peter Cox are on hand to provide expert and long lasting damp proofing treatments.

When you choose Peter Cox for damp proofing you benefit from:

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  Does my house have damp proofing in place?

  Most UK homes have a built-in DPC, but over time, this barrier can fail or become bridged. Signs like tidemarks or peeling paint may suggest it's no longer effective. If visible on the outside of the property, the physical DPC (slate, bitumen or plastic membrane) should be two brick courses above ground level and may appear as a slightly thicker mortar course. If you're unsure, our qualified surveyors can carry out a thorough damp proofing survey to check whether a DPC is present and working properly.

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  How long does damp proofing take?

  The duration depends on the type and extent of damp. A typical damp proofing job in a standard room takes 1 to 3 days, including installation and drying time. Larger properties or basements may take longer. We always provide a clear timeline after your damp inspection.

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  How long does damp proofing last?

  When professionally installed, damp proofing treatments can last for decades. Our systems come with long-term guarantees for added peace of mind. For example our rising damp treatments typically come with a 20 year guarantee, indicating our confidence in accurately diagnosing and solving your damp problem.

  Regular maintenance and addressing any underlying issues, like leaks, can further extend the effectiveness of your damp protection.

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  Can I deal with damp proofing myself?

  DIY solutions may offer short-term relief but often the damp problem is misdiagnosed or the full extent of the problem is not addressed. This can cause the problem to return in the future. Our damp proofing specialists have the tools and expertise to diagnose and solve issues correctly. Getting it right the first time avoids repeat repairs and ensures long-lasting protection for your home.

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  Will the damp proofing specialists clean up afterwards?

  Absolutely. Our teams are provided with tools and equipment to minimise dust and debris inside a property, meaning your home is left as tidy as possible. They will use floor coverings, dust sheets and are equipped with vacuums for use throughout the treatment process.

  All Peter Cox technicians use Hilti dust extraction units which help remove airborne dust from the atmosphere while hacking off salt contaminated plaster, drilling or cutting timber.

  Once the damp remediation work is complete, we remove waste and clean the area, leaving your home tidy, safe, and ready for redecoration.

The cost of damp proofing varies depending on the cause of the damp, the size of the affected area and the treatment required. Rising damp, penetrating damp and condensation require different solutions, so an accurate diagnosis is essential before treatment can be recommended.

If structural timbers have been damaged or if replastering is required, this will also affect the price of treatments.

Because of this it is impossible to provide a breakdown of costs without first surveying the property to understand the root cause of the problem.

Companies that offer the up front costs of damp proofing without inspecting the property have no way of knowing the full extent of the problem, or if damp proofing is even required at all.

We offer competitive, transparent pricing for both our surveys and our damp proofing works. If no damp proofing is required, we will make this clear in our survey report.

• The type of damp
• Size of affected area
• Condition of plaster and walls
• Condition of structural and decorative timber
• Whether a damp proof course (DPC) is required
• Whether external repairs are needed
• Replastering requirements
• Property construction and accessibility

Book a professional damp inspection with our team to receive a tailored quote based on the specific needs of your property.

Peter Cox are able to provide you with specialist advice and damp proofing solutions no matter where you are located in the UK.

We have local teams of expert surveyors and technicians who will first provide a damp and timber survey, and if treatments are required, complete expert damp proofing solutions.

Based at our nationwide network of local branches, our teams are local to you, meaning they have experience in dealing with the local architecture and building types.

Typically our damp proofing treatments are backed by long term guarantees, up to 20 years for some services.