In August 2026 our team took out 30m² of old 50mm loft insulation from a home in Southam, Warwickshire, cleaned between the joists and laid 300mm of Knauf mineral wool in its place. The work took 1 day and comes with a 10-year guarantee.
The loft had around 50mm of old insulation across 30m² of floor. There was also an old pallet left up there that needed taking out.
What we did
Removed the old 50mm insulation from 30m² of loft
Cleaned out between the joists
Took away the old pallet
Laid 300mm of Knauf mineral wool
Kept a 15mm gap at the eaves so air can still move through the roof space
Fixed a bag of insulation to the back of the loft hatch to stop heat escaping there
The result
The loft went from 50mm to 300mm of insulation in a day, with the eaves left clear for airflow and the hatch insulated. The work comes with a 10-year guarantee.
A check you can do yourself
Have a look at your loft hatch. If the back of it is bare board, warm air can escape straight through it, however deep the insulation is elsewhere. A bag of insulation fixed to the back of the hatch, as we did here, is a simple fix.
Questions about this job
How much insulation went in?
We removed about 50mm of old insulation from 30m² of loft and laid 300mm of Knauf mineral wool in its place.
Why leave a gap at the eaves?
Air needs to move through the roof space. On this job we kept a 15mm gap at the eaves so the new insulation does not block that airflow.
Do you take the old insulation away?
Yes. On this Southam job the old insulation was removed, the space between the joists was cleaned out and an old pallet was taken away before the new wool went down.
Got something similar? Send us a photo and we'll tell you what we see.