Understanding Rising, Penetrating and Condensation Damp

We are certainly not a stranger to dampness here in the UK, the damp weather seems to have decided to stay for the foreseeable future and this can cause significant damage to buildings. All damp is penetrative by nature and rising damp comes from moist ground and climbs up walls, which is why buildings have a damp proof membrane installed at ground level.

How is penetrating damp different from rising damp?

The difference being that penetrating damp can affect any part of a building, the roof, the walls or even floors, while rising damp specifically attacks material just above the building’s ground line. Damp will penetrate any material it comes into contact with, damaging brickwork, masonry, mortar and timber. If you notice signs of damp in your home, call London Damp Specialists and arrange for a property damp survey and you will receive a detailed survey report within one day of survey completion.

Condensation

This is a phenomenon that occurs when two different temperatures meet, typically on a windowpane, when the moisture turns into water on the inner glass surface. Pour cold beer into a glass and you can watch condensation form on the outside the glass as room temperature meets the cold glass and this is what happens in a home with moisture issues. There are things you can do to minimise condensation, such as closing the bathroom door when taking a hot shower or bath to keep the moisture from affecting the rest of the house and opening the windows to let dry air in and moist air out. You might be wondering how to find a condensation specialist near me, and we are proud to be a leading provider of damp services. Ventilation is essential to reduce/remove moisture that causes condensation and at London Damp Specialists, we offer a ventilation flow test as part of a thorough damp survey.

The importance of early detection

All forms of damp cause significant damage to buildings, which is why you need regular inspections; at London Damp Specialists, we offer London homeowners a range of damp surveys carried out by certified surveyors, call us on 020 8528 3864 during office hours or fill in the online form on our website. You can also be proactive by regularly inspecting walls, ceilings and floors, looking for damp, mould and mildew and should you find evidence of moisture, we offer damp proofing in London that is guaranteed for 30 years.

Selling your home

If you are in the process of selling your London home, why not order a homebuyer damp survey? Any potential buyer would be very happy to see the survey report that states the property is free from damp and is structurally sound. This is a great selling point and it saves the new owner from having to survey the building for dampness and condensation, which would be the natural thing to do prior to signing the contract.

Don’t make the mistake of thinking that damp is something that only affects other people’s homes, it is a very real threat to every property in London and the entire UK.

Damp Survey Costs

Transparent pricing with no hidden fees for our independent, unbiased surveys.

Level 1

Level 1

£199 + VAT

What’s included:

  • Inspection of walls
  • Inspection of floors
  • Inspection of ceilings
  • Leak inspection of drains and plumbing
  • Damp information and prevention guide
Level 2

Level 2

£299 + VAT

What’s included:

  • Everything in Level 1
  • Dry rot inspection
  • Wet rot inspection
  • Woodworm inspection
  • Damp information and prevention guide

 Survey Add Ons

Add On 1

£299 + VAT

Lab Analysis Of Plaster

Add to Survey

Add On 2

£299 + VAT

Mould Lab Swab Testing, qPCR on DNA

Add to Survey

Qualifications: All our surveyors are PCA and CSRT qualified for remedial treatments and also CSSW qualified for structural waterproofing.
Next day report: You will receive the report within 24 hours of the inspection taking place.

The survey fee will be deducted from the cost of any recommended repairs.

These are the tools we use

A damp meter

A damp meter

A damp meter is a diagnostic tool used to detect and measure moisture levels within building materials such as plaster, brick, timber, and concrete.

Borescope camera

Borescope camera

borescope camera is a small inspection camera attached to a flexible semi-rigid cable that allows you to see inside areas that are otherwise inaccessible.

Inspection Drone

Inspection Drone

A drone is a remotely operated aerial device equipped with a camera that allows visual inspection from above without the need for scaffolding or ladder.

Air Humidity Sensor

Air Humidity Sensor

Air humidity sensor measures the amount of moisture present in the air, expressed as relative humidity (RH) in percentage. It helps determine whether indoor conditions are contributing to condensation, mould growth, or damp-related issues.

Thermal Imaging Camera

Thermal Imaging Camera

A thermal imaging camera detects temperature differences on surfaces by using infrared technology to produce a heat map image. In damp investigations, it helps identify cold spots, moisture intrusion, insulation defects, thermal bridging and leaks.

Air Flow Ventilation Detector

Air Flow Ventilation Detector

An air flow ventilation detector measures the movement and volume of air passing through vents, extractor fans, and air bricks. It confirms whether ventilation systems are working properly and achieving adequate air changes within a room. Poor airflow leads to trapped moisture, high humidity, condensation on cold surfaces, and ultimately mould growth.

Mould Swab Test Kit

Mould Swab Test Kit

A mould swab test is carried out to confirm the presence of hidden mould growth and identify the specific species involved. Surface mould is not always visible, especially behind furniture, inside cavities, or within ventilation systems. Laboratory analysis of a swab sample determines whether active mould spores are present and what type they are, which helps assess potential health risks and decide the correct remediation approach rather than relying on visual assumption alone.

Plaster Salt Analysis Lab

Plaster Salt Analysis Lab

Laboratory analysis of plaster is used to identify the type of salts present within the material, typically chlorides and nitrates. The presence and concentration of these salts help determine whether the moisture source is consistent with rising damp, ground contamination, or another forms [sic] of water ingress. such as mains water leak, This removes guesswork and prevents misdiagnosis, ensuring the correct remedial treatment is specified rather than applying unnecessary or ineffective solutions.

Contact Us

If you have some questions, please complete this form:

Book and Pay for a survey

If you are ready to book a survey and pay, please complete this form:

Contact Us

If you have some questions, please complete this form:

Book and Pay for a survey

If you are ready to book a survey and pay, please complete this form:

Contact Us

If you have some questions, please complete this form:

Book and Pay for a survey

If you are ready to book a survey and pay, please complete this form: