Removing Condensation from Bathrooms – A London Homeowner’s Guide

Removing Condensation from Bathrooms – A London Homeowner’s Guide

3rd July, 2025

If there is one room in the house where you’ll find condensation, it has to be the bathroom; those piping hot baths cause condensation on all the surfaces and moisture can damage timber, plaster and masonry. Running a hot bath or shower is going to lead to condensation regardless of the condition of the building, so it isn’t really something to worry about, as long as you take steps to remove the water droplets as soon as you can.

Create an airflow

As soon as you step out of a hot shower or bath, wrap yourself in a towel and open the windows; it isn’t a good idea to open the bathroom door at this stage, as the moisture will get to the rest of the house. Once the moist air has been replaced, you can open the door; we recommend keeping a couple of dry cloths in the bathroom, which you can use to mop up water droplets from windows, walls and cabinets. It is important to check hard-to-reach places, as if water droplets remain for some time, mould could be the result. Using a good chemical cleaner, you should thoroughly clean and dry the bathroom on a weekly basis. Condensation will not damage ceramic tiles, but other materials like timber and plaster can be damaged if condensation remains.

Portable dehumidifier

This is a very effective way to remove excess moisture from a room; as soon as you have finished using the bathroom, place the machine in the room and turn it on for 30 minutes. This can also be used in other locations around the house, which is the best way to dry out the air. If your home is humid, investing in a couple of these machines can really help.

Cleanliness is important

Of course, every bathroom should be spotlessly cleaned, especially so if there is condensation; use chemical cleaning products and make sure you clean everywhere, especially hard-to-reach areas. If the bathroom is clean, mould cannot survive and keeping on top of condensation will prevent damage to materials.

Insulation

Good insulation helps to reduce the risk of condensation; if you have cavity walls, a foam can be injected that improves insulation, while double glazing removes the risk of condensation on glass and window frames. This applies to other rooms in the house and we work with a leading London damp-proofing contractor that covers all London Boroughs.

London damp-proofing

If your home has condensation issues, you should arrange for one of our certified damp surveyors to inspect the property. We offer a professional service at very competitive prices, our qualified surveyors use state-of-the-art equipment to help them accurately assess a building for the presence of rising and penetrating damp, condensation, mould, mildew, woodworm and timber rot.

Give London Damp Surveys on 0207 305 5997 during regular office hours or fill in the form on this website.

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

Laboratory analysis Of plaster identifies hygroscopic salts such as chlorides and nitrates. which indicate whether damp is caused by rising groundwater or by plumbing leaks, This testing removes guesswork, allowing the exact source of moisture to be identified so the correct treatment is applied rather than carrying out unnecessary damp-proofing work.

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Add On 2

£299 + VAT
Mould Lab Swab Testing, qPCR on DNA

qPCR DNA mould testing detects microscopic mould spores that are invisible during a normal inspection and van remain hidden behind walls, floors. or inside building rkaterials. It identifies the exact mould species present and the contamination level, allowing hidden mould problems to be confirrned and properly treated before they affect the property or occupants’ health.

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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.

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.