It’s not the most glamorous part of your home, but loft insulation has a massive influence on how warm your rooms feel and how much you spend keeping them that way.
When it’s missing, too thin, or compressed under storage, you can lose up to a quarter of your heat straight through the roof. We hear the same questions from homeowners time and again, and with good reason. If your upstairs is chilly or your bills keep climbing, these are the answers that matter most.
1. How Can I Tell If My Loft Insulation Still Works?
A quick look in the loft will often tell you. If the insulation sits below the top of the joists, is flat and patchy, or looks uneven, it’s underperforming.
You should see a soft, even layer at least 270mm deep. Cold bedrooms, heating that runs longer than it used to, or signs of condensation inside the roof are also clues.
2. Does Using the Loft for Storage Affect Insulation?
Yes, if items are placed directly on top. Insulation works by trapping air. Heavy boxes squash the fibres, removing those air pockets and cutting performance by up to half. The fix is raised loft boarding, which lifts storage above the insulation so it can do its job while keeping airflow intact.
3. Which Type of Loft Insulation Performs Best?
MK Loft Boarding uses Knauf Loft Roll 44. It’s non-combustible, BBA-certified, made from up to 80% recycled glass, and it holds its shape for decades. Installed correctly, it provides consistent thermal performance without sagging or breaking down.
4. Is It Worth Topping Up or Replacing Old Insulation?
Absolutely. Many homes built before the 2000s have only 100–150mm of insulation. Bringing that up to the recommended 270mm can save £120–£250 a year on heating. Sometimes a simple top-up is enough; other times the old material needs replacing entirely.
5. How Quickly Can It Be Sorted Before Winter?
Most loft insulation upgrades take less than a day. The process at MK Loft Boarding begins with a free survey, followed by a clear recommendation, and the work is booked in before the cold sets in. No pressure, no hidden costs.
The Best Time to Replace Insulation: Now
Proper loft insulation doesn’t just keep heat in. It helps prevent condensation, mould, and structural damage in your roof space. And with energy prices still high, it’s one of the most effective ways to make your home more efficient.
MK Loft Boarding works across Milton Keynes, Bedford, Luton, Northampton, and the surrounding areas. They’ve seen every type of loft and know how to get yours working properly before the winter chill arrives.
Book your free, no-obligation loft survey at MK Loft Boarding.
