A Damp Checklist for Homebuyers, Know Before You Buy!
Are you planning on purchasing a home in the London area? If so, we have a bit of advice for you- Before you buy, you need to make sure the structure is free of any damp-related issues that can escalate into untold property damage and serious health problems! It’s essential that you obtain the services of an independent damp surveyor who will carefully inspect the home to identify any damp problems before you decide to buy, so you don’t end up with a wet mess you will come to regret!
Here is a damp checklist to use during your home purchasing process:
The Cellar or Basement – This is always the first place to check for damp problems.
- Carefully inspect the stairs, ceiling, and joists for wet or dry rot and mould growth.
- Look for peeling or bubbling paint and discoloured walls.
- Check the floor for cracks in the foundation.
- Have your independent damp surveyor use their humidistat or moisture meter or to see if the humidity levels have climbed above 50%. If they have, it means there is a damp problem.
- Is the sump pump working properly?
- Is the floor drain flowing freely?
- Check to see if there are any existing basement tanking systems, older homes may not have one, but they are required in newer homes.
- If there is a tanking system in place, is it intact and functioning properly?
The Kitchen & Bathroom –
- Look for plumbing leaks around the dishwasher, refrigerator, sinks, tubs, and showers.
- Inspect the tiles, grout, and caulking for mould and breakage.
- Are the kitchen and bathroom fans properly venting to the home’s exterior?
- Look for mould growth and musty smells in the cabinets, under the sink, in the shower, and around the toilet. Mould is a serious health hazard and must be eradicated!
Floors, Ceilings, Walls, & Windows –
- Look for heavy condensation, peeling drywall, and moisture leaks around window frames.
- Check for heavy condensation on the walls and windows, it’s a sign that indoor humidity is high.
- Ask your independent damp surveyor to inspect the ceilings, walls, and flooring for sagging, bowing, discolouration, and damp spots. If there’s a drop-down ceiling, lift the tiles up to inspect the cavity above for wet rot, mould, and moisture.
- Make sure the home is properly ventilated by looking for exhaust fans and making sure they are operating properly.
- Check for mould in closets and storage spaces.
- Look under the carpet and behind vinyl wallpaper for mould growth.
At London Damp Specialists our experienced surveyors utilise cutting edge technology to diagnose damp issues, so our inspections are always performed to the highest standard. If you have a rising damp problem, just call London Damp Specialists on 020 7523 5882 and we will dispatch an independent damp surveyor near you to help ascertain your damp problem. We also quote for recommended remedial work.
Damp Survey Costs
Transparent pricing with no hidden fees for our independent, unbiased surveys.
Level 1
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
What’s included:
- Everything in Level 1
- Dry rot inspection
- Wet rot inspection
- Woodworm inspection
- Damp information and prevention guide
Level 3 (Most Popular)
What’s included:
- Thermal Imaging
- Air humidity testing
- HD boroscope camera
- Brickwork pointing inspection
- DPC inspection
- Ventilation flow test on extractor fans
- 4K drone imagery roof, chimney stack
and guttering inspection - Structural condition inspection
- Inspection of walls
- Inspection of floors
- Inspection of ceilings
- Leak inspection of drains and plumbing
- Dry rot inspection
- Wet rot inspection
- Woodworm inspection
- Damp information and prevention guide
Survey Add Ons
Add On 1
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.
Add On 2
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.
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
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 is a small inspection camera attached to a flexible semi-rigid cable that allows you to see inside areas that are otherwise inaccessible.
Drone Inspection
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 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
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
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 Lab Swab Testing
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.
Lab Analysis of Plaster
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.
