How to Spot Hidden Mould Before It Poses a Risk
Mould doesn’t always announce itself with visible black patches. Often, it hides in quiet, unseen places that are just waiting for the right conditions to grow. Spotting it early can save you money and protect your home and health.
Where Mould Likes to Hide
Even neat and tidy homes aren’t safe. Mould often grows where moisture meets darkness. Common hideouts include:
Behind wallpaper or paint, where bubbling, peeling, or warping can signal moisture beneath the surface. The chemicals and plaster that trap water underneath can quietly support mould growth.
Under carpets or rugs, especially over damp padding or slowly drying floors. A squishy feeling or musty underfoot indicates trouble brewing.
Around window frames and sills, where condensation accumulates. Moisture in these areas can lead to hidden mould between the frame and wall.
In roof spaces or crawlspaces, dark, poorly ventilated, and often damp locations where mould can quietly spread.
What to Look and Listen For
A musty, earthy smell is often the first clue even before mould is visible. Trust your nose.
Notice small dark stains in grout, on ceilings, or near skirting boards. These can be early signs of mould. Look for warping or soft spots in wood, bubbling paint, or cracked plaster these changes often mean water damage behind the scenes.
When to Call in a Professional
If you detect any musty odours, unexplained health symptoms, or visible signs of hidden mould after
