A damp specialist (or damp surveyor) is a skilled professional who performs a comprehensive damp survey of a property to investigate and define issues related to moisture, wetness, or dampness. These specialists are often called upon when previous surveys by valuers or building surveyors have identified potential concerns requiring further investigation, or sometimes merely as a precaution to protect clients from future problems.

The damp specialist checks the property to determine the precise location, type, and extent of the damp problem, assessing the potential damage the issue may cause if left untreated. Based on these findings, they recommend a necessary plan of action or measures that need to be put in place to treat the problem and minimise ongoing damage.

What does a damp specialist do?

A damp specialist, often referred to as a damp surveyor, performs a comprehensive inspection of a property to diagnose the presence, extent, and type of moisture issues, while also assessing potential damage if the wet conditions are left untreated.

The key steps and duties a damp specialist undertakes include:

  • Conducting a detailed survey and checking the property for wetness and moisture content using specific tools, such as a damp metre, to measure levels inside the inner walls.
  • Determining the type of damp problem causing the issues, specifically assessing whether the property is affected by rising damp, penetrating damp, or condensation.
  • Recommending a necessary plan of action and specific measures required for dealing with the damp issue and minimising further damage.
  • Providing a full report following the inspection, which includes all findings, recommendations for treatment (such as timber treatment or damp proofing work), and often an associated quote.

What is the purpose of a damp course?

The purpose of a damp-proof course (DPC) is to act as a physical or liquid barrier integrated into the structure of a property, designed specifically to prevent moisture and water from the ground from rising up into the walls. This process of water travelling upward through capillary action is commonly known as rising damp. The DPC layer, which may be installed horizontally or vertically, is typically laid below all masonry walls, regardless of whether they are load-bearing or partition walls. By preventing rising damp, the damp course protects the property from damage; without this barrier, excess moisture can affect plaster, decoration, and unprotected timbers, potentially resulting in severe issues such as wet rot or dry rot.

How long does a damp survey take?

The duration of a damp survey varies depending on several factors, but typically a standard survey takes between 1 to 2 hours to complete. However, if the suspected problem is extensive or complex, the survey may require a longer duration, sometimes taking 3 to 4 hours.

Factors that influence how long a damp survey takes include:

  • The extent or complexity of the suspected damp issue.
  • The size and complexity of the property being surveyed.
  • The specific methodology utilised by the surveyor.

While the owner is required to allow the surveyor access to the property and all rooms concerned, they generally do not need to remain present for the full duration of the survey.

How to check dampness in walls?

The primary ways to check dampness in walls involve looking for visual and tactile indicators, and conducting a simple home test to determine the type of damp present. Initial tell-tale signs of a damp problem include noticing a pervasive musty smell, feeling that walls or ceilings are damp to the touch, and observing visual damage such as mould or mildew (especially around windows and doors), and discoloured patches like brown or yellow-tinged stains appearing on plaster or wallpaper.

If you have noticed a damp problem but are unsure whether it is caused by condensation or penetrating, or rising damp, you can use the following foil test:

  • Tape a square of aluminium foil securely to the affected wall.
  • Leave the foil taped to the wall for 24 hours (one full day).
  • Inspect the results: If the side facing away from the wall (the exposed side) is wet, the issue is likely condensation. If the inside of the foil (the side touching the wall) is wet, this indicates penetrating or rising damp.

While the foil test is not a professional diagnosis, it can help point you in the right direction when contacting a specialist company.

Who deals with damp in houses?

Who deals with damp in houses is often determined by whether the occupant is a homeowner or a tenant, and whether the issue persists after attempting initial solutions. If the damp is not going away after trying to address the potential source, homeowners should hire a professional damp specialist or a damp surveyor. This specialist will come to survey the home, look at the problem, and provide recommendations on how to solve the damp, along with the associated costs. For tenants, it is the landlord’s responsibility to find out what is causing the damp, and they should not blame the tenant for the issue.

When hiring a specialist for major damp-proofing works, it is essential to ensure they are reliable and trustworthy by following key checks:

  • Get at least three quotes to compare the price and the extent of the proposed works.
  • Ask for recommendations from family, neighbours, or local community groups.
  • Check that the company is a member of the Property Care Association (PCA), which is the relevant trade association for specialists.
  • Verify that the company offers insurance-backed guarantees and can guarantee your deposit for major works, as PCA membership helps provide extra protection and assurance of qualifications.

Is damp expensive to treat?

The cost of treating damp varies significantly depending on the type and scale of the problem, meaning definitive costs are difficult to provide without a custom quotation. The cost of fixing rising damp and applying dampness treatment can range widely, generally falling anywhere from £250 up to £6,500, depending on the scale of the issue. Treatment for rising damp may cost more or less than a damp proof course, focusing on penetrating damp, emphasising the variability in pricing. 

Due to these factors, specialists typically provide guide damp proofing values, but a custom quotation is necessary to determine the final, overall cost. Despite the broad range, the average cost of damp proofing typically sits at around £5,000.

Is damp covered by home insurance?

Damp is generally not covered by standard buildings and contents home insurance policies. Most insurers exclude damage caused by damp and condensation because it is typically the result of gradual disrepair or lack of maintenance rather than a sudden, insured event. Policies often operate on the assumption that the home is maintained in a "good condition," and damage resulting from chronic disrepair is usually excluded. Furthermore, the worse a damp situation becomes, the more costly the repairs are likely to be, but this will still not trigger cover under most standard policies.

How much does a damp specialist cost?

The cost of a damp specialist survey typically varies depending on the property's size, type, and prevailing conditions. For a smaller two-bedroom property or flat, the damp survey cost generally starts around £200. This price increases with property size; a survey for a three-bed terraced house usually costs around £400, and for a larger four-bed detached house, the price can range from £500 up to £600, depending on the complexity and circumstances.

Alternatively, some companies offer lower upfront fees for their initial surveys. For example, some providers charge approximately £90 (VAT included) for a survey, with the stipulation that this fee is often removed from the final bill if the homeowner chooses to have the required damp proofing or remedial works carried out by that same specialist.

How much does it cost to get rid of damp?

The cost to get rid of damp varies significantly depending on the type of damp (such as rising damp versus penetrating damp) and the overall scale of the problem. As a general guide, you can expect the average cost for comprehensive damp proofing to be around £5,000.

However, the cost of fixing damp and applying necessary treatment can range anywhere from £250 to £6,500, depending heavily on the complexity of the issue. Because the specific damp proofing course needed (e.g., treatment for rising damp versus penetrating damp) affects the price, these figures serve only as guide values, and a custom quotation from a specialist is necessary to determine the final overall cost.