Feb 12, 2026
Untold Mould

How our Mould Testing Kit Pays for Itself in Property Value

Our home is our largest financial asset. We spend thousands of pounds renovating our kitchens and bathrooms, and making our gardens beautiful, not only to preserve but also to help increase the property value.

 

But there is a hidden threat that can silently damage your property, and diminish its value: Mould.

 

At Untold Mould, we believe the biggest threat to the value of your home is the hidden mould that’s lurking in dark corners and behind furniture.

 

By the time those black and green spots emerge and are visible to the naked eye, it could be too late. The damage may have already been done, meaning you’ll have to spend thousands on mould removal, or sacrifice resale value so your buyers can fix it.

 

This is why you should always test early. We’re aware that testing your mould for home isn’t cheap, but mould testing at home is incredibly good value for money.

How can mould damage my property?

Whilst you can sometimes tell mould is in your home as it’s highly visible, the real worry is the damage the hidden mould does to your home.

 

Because it’s technically a fungus, it needs to eat, and your home is its food.

Structural damage

Mould will feed on any organic matter, like wood. Prolonged moisture and mould can weaken timber structures and damage building materials over time. It can also lead to pipes corroding, causing leaks, which means further damage.

Cosmetic damage

Decorating your home isn’t cheap either, and mould hidden behind wallpaper can cause it to peel, as well as cause paint to crack, and it’s not advisable to just paint over mould. Catching mould early can prevent you from needing to spend on costly redecoration, before it’s due.

Damage to appliances

Appliances that produce moisture, like fridges, being too close to the wall can both cause mould and be damaged by it. Over time, mould can lead to rust and corrosion beyond repair, meaning your expensive American-style Samsung fridge-freezer will need to be replaced, and it won’t be covered by your warranty.

 

The costs add up when you’re not regularly testing your home for mould and fixing mould issues, and could lead to you having to either spend thousands of pounds on fixing complex problems, or living with the potential health issues.

And the survey says…

If you’re looking to sell your home, mould can be a dealbreaker for potential buyers, especially if it’s damaged the structural integrity of your house. The majority of homebuyers will get a professional survey carried out to help them make their decision, and surveys are becoming increasingly rigorous.

 

If a surveyor detects mould in the air, they’ll likely advise the buyers to decrease their offer by what it’ll cost to fix the mould issues, or worse, they may advise them to pull out completely.

 

Testing your home for mould and rectifying any issues before putting it on the market is likely to cost you a lot less in the long run.

Which mould test should I do?

A standard DIY mould testing kit will only be able to tell you what’s visible, as you’ll take a swab and it’ll simply say “yes, it’s mould on your wall”.

 

A professional mould and air sampling kit like our Untold Mould mould testing kit goes far beyond that. It can detect 90 different strains of mould spores in the air, with 99% accuracy.

 

You simply choose the rooms you want to test, pop a refillable mould testing cassette in the device, turn it on, wait half an hour and send the cassettes back to us.

 

Within 3 working days of us receiving your mould test, you’ll receive a full report that tells you exactly which mould particles are present in your home. This will equip you with the knowledge you need to take the next steps and catch mould early.

£199 vs £10,000 - the choice is yours

Our home mould testing kit is a premium price, but it could be down to a choice of spending £199 on our device and a few hundred pounds immediately to tackle mould issues before they arise, or accepting a lower offer to account for remediation costs.

 

Even if our mould testing kit detects no mould, our AI-powered lab report can be a valuable asset in proving that your home is mould-free when selling it, as it can reassure buyers, which could potentially lead to a quicker sale.

 

Want to learn more about our mould testing kit? Take a look at our product page, and get in touch if you have any questions.