The Negative Effects Of Damp On Your Home’s Value

Here is a sincere word of advice to London home owners who are thinking of selling- don’t let it get damp! If you detect even just a small wet patch on a wall you need to take immediate action, because once the damp creeps in, it can spread throughout the house more rapidly than you expect. If you see any signs of dampness, it’s best to have an independent damp and timber survey performed as soon as possible so you can take remedial action. If the rising damp and other dampness problems go untreated, your property will begin to be devalued, losing its appeal and harming your profits!

Over the last decade, awareness of the health hazards and potentially dangerous damage to a home’s structure that damp can cause has grown, so today’s home buyers are now more cautious, and will very likely request a pre-purchase damp survey before they are willing to invest. That’s why it’s best for the home owner to be proactive, making sure any damp issues are sorted before putting their home on the market.

A damp problem that goes unchecked can have a very negative effect on the property value, here are some examples:

A Hard Sell – If your home is dripping with damp and the structure has sustained damage, it’s going to be a real hard sell, it’s doubtful that anyone will want to purchase it. In a worst-case scenario in which the structure is severely dilapidated it’s probably best to tear it down and just sell the lot. Hopefully it never gets to that sorry state, which is why we urge you to take action and order an independent damp surveyor in London to assess the situation before it’s too late.

Repairs Are Pricey – Once a home has sustained damage from damp related issues its guaranteed that the repairs are going to be pricey. Untreated damp can do untold amounts of damage to a home, the foundations are weakened, the timbers rot, and even the brickwork can fall part! If the problem is allowed to advance that far, extensive damp repair services will be required, and they will cost you plenty.

The Market Value Drops – The sad fact is that if your home has been damaged by untreated dampness, its market value is going to drop significantly. The presence of damp is sure to turn off potential buyers, so your asking price is going to have to decrease to match the devaluation. Extensive damp related issues can reduce your home’s sale price by over 70%- don’t allow the damp to rob you!

At London Damp Specialists our certified surveyors use digital technology to diagnose damp and mould problems, so our inspections are always performed to above industry standard. If you have a rising damp issue in your London home, just call London Damp Specialists on 020 7523 5882 and we will send an independent damp surveyor near you to help ascertain your damp problem. Winter is on its way, so have your home inspected for dam and mould.

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.

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

These are the tools we use

Damp Meter

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.

Drone Inspection

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

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 Lab Swab Testing

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

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.

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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:

Book Survey

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:

Book Survey

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:

Book Survey