From bubbling paint to earthy odours, UK households are being warned to watch out for sneaky signs of mould this summer.
Bathroom experts at Vidalux are urging homeowners to stay vigilant as rising temperatures and increased humidity create the perfect breeding ground for mould in bathrooms, kitchens, and cellars.
With estimates suggesting that between 4% and 27% of homes in England are affected by damp and mould*, the issue is more widespread than many might think.
And although mould around the house is often associated with cold, damp, winter weather, it can be equally as troublesome in the warmer months.
Left unchecked, hidden mould can trigger respiratory issues, damage property, and even impact indoor air quality.
To prevent mould from becoming a major issue, homeowners are being told to conduct regular checks in problem areas such as bathrooms, kitchens, and cellars.
Andy Ellis from Vidalux.co.uk said: “Many people assume mould is only a problem in winter because colder months typically bring more rain, dampness, and condensation – all of which create ideal conditions for mould growth.
“But the reality is that summer can be just as problematic because warmer temperatures and increased humidity can also create a breeding ground for mould. In fact, the combination of warmth and moisture can really accelerate mould growth, especially in poorly ventilated areas like bathrooms.
“Look out for tell-tale signs like bubbling paint, musty odours, and black spots around bath and shower seals and tile grout, as these seemingly minor issues can quickly escalate, leading to structural damage, respiratory problems, and a decline in indoor air quality.
“Regular checks and early intervention are key as catching mould early can prevent extensive and costly repairs – not to mention protecting your health and that of your family.”
Here are seven signs of mould as the weather gets warmer:
- Increased humidity indoors
Mould thrives in warm, damp conditions, making summer a prime time for growth. If certain rooms feel more humid than usual, it could indicate hidden mould, especially in poorly ventilated areas like cellars or bathrooms. Pay attention to areas near leaky pipes or windows where moisture can accumulate unnoticed.
- Unusual smells
A persistent musty or earthy odour, especially in areas like cellars, attics, or behind furniture, can signal mould. This scent is caused by microbial volatile organic compounds (MVOCs) released by mould colonies. So even if you can’t see the mould, the smell can indicate hidden growth behind walls or under flooring.
- Condensation on windows
If windows are fogging up more than usual, it could indicate excess moisture in the room – a prime condition for mould to develop. This is especially common in kitchens and bathrooms where steam builds up, and regular condensation can lead to mould forming around window frames and seals.
- Discoloured walls and ceilings
Yellow, brown, or greenish patches that seem to appear suddenly can be a sign of mould. These discoloured spots often indicate moisture is seeping through walls or ceilings, allowing mould to spread beneath the surface. Pay close attention to areas near plumbing or roofing leaks.
- Peeling or bubbling paint
Paint that’s blistering, cracking, or peeling could be a sign of moisture and potential mould underneath. When mould forms behind a painted surface, it can cause the paint to lift and bubble. If the issue is ignored, the mould can spread to other areas, causing more structural damage.
- Stuffy or damp feeling
Even with good ventilation, certain areas may feel persistently damp or stuffy, suggesting hidden mould. This could be due to mould growth behind walls, under carpets, or in crawl spaces where airflow is limited. A constant damp sensation is a key indicator that moisture levels are too high indoors.
- Respiratory symptoms
If allergy-like symptoms such as sneezing, coughing, and sore throats worsen indoors or in specific rooms, it might indicate mould spores. Mould can release allergens and irritants into the air, exacerbating respiratory issues. Those with asthma or sensitivities may notice symptoms intensify in mould affected areas.
