5 Signs Your Loft Insulation Needs Replacing (Don't Ignore Number 3)

Loft insulation isn't something most homeowners think about — until the heating bill arrives. But by the time you're noticing your home is harder to keep warm, your insulation has often already been failing for years.

Here are five signs that your loft insulation needs attention, and what you should do about each one.

1. Your Energy Bills Are Going Up — And You Don't Know Why

If your energy bills have been creeping up year on year and you haven't changed your heating habits, degraded loft insulation could be to blame. Up to 25% of a home's heat is lost through the roof — and if your insulation is old, thin, or moisture-damaged, you could be losing a significant amount of heat you're paying to produce.

A free thermal survey from KMS will tell you exactly how much heat your loft is losing and what the right fix looks like.

2. Your Home Takes Ages To Heat Up

A well-insulated home retains heat efficiently — once you've warmed it up, it stays warm. If you're finding that your home cools down quickly after the heating goes off, or takes a long time to reach a comfortable temperature, your loft insulation is likely failing to do its job.

3. You Can See Damp or Condensation in Your Loft

This is the one to act on immediately. Damp patches, condensation on timbers, or visible mould growth in your loft space are signs that your insulation is no longer acting as a vapour barrier. Moisture is getting in and being trapped — which damages your roof timbers, your insulation, and ultimately your home's structure.

Left untreated, loft condensation can lead to timber rot that requires expensive remedial work. If you're seeing any signs of damp in your loft, contact KMS for a free survey as soon as possible.

4. Your Loft Insulation Is More Than 20 Years Old

Traditional fibreglass insulation has a lifespan of around 15–20 years before it starts to degrade, compress, and lose its thermal performance. If your insulation was installed before 2005, there's a strong chance it's no longer performing anywhere near the level it was when it was new.

Building regulations for minimum loft insulation depth have also changed significantly in the last two decades — your old insulation may now fall well below current standards.

5. You Have Spray Foam in Your Loft

If spray foam insulation was installed in your loft — whether you knew about it when you bought the property or not — it needs to be professionally removed. Over 50 UK mortgage lenders now reject properties with spray foam, and it can cause serious moisture and timber damage over time.

KMS specialises in spray foam removal across the West Midlands and UK-wide, with a completion certificate provided on every job.

What Should You Do?

If any of the above sounds familiar, the first step is a free, no-obligation thermal survey from KMS. We'll assess your loft, identify exactly what's happening, and recommend the right solution — whether that's a full replacement with All Seasons Foil, a fibreglass top-up, or a spray foam removal.

We cover Wolverhampton, the West Midlands, and the whole of the UK. Call 01902 288 209 or book online at kmsinsulationsltd.co.uk.