If you've spotted black spots on the timbers or felt in your loft, the usual culprit is condensation: warm, damp air from the home rising into a cold, poorly ventilated roof space, where it settles on cold surfaces.
Wiping mould away only treats the symptom. The lasting fix is to treat the affected areas and correct the cause — improving ventilation, redirecting any vents to the outside, and making sure insulation isn't choking the airflow at the eaves. Done properly, it doesn't come back the following winter.
Want a straight answer for your home? Book a free, no-obligation loft assessment and we'll give you honest advice and a clear quote within 24 hours.
A clear breakdown of what loft insulation costs in 2026, what affects the price, and how quickly it pays for itself.
The recommended loft insulation depth is 270mm. Here's why that figure matters, and whether you should top up or start fresh.
Insulation and ventilation go hand in hand. Get the balance wrong and you risk condensation, damp and mould in the roof.
Loft insulation is one of the cheapest ways to lift an EPC score — and from 2030 the rules for rented homes are tightening.
Older homes are charming but often draughty. Here's how to insulate an older loft without causing damp or losing headroom.