Multifoil insulation: thin foil where space is tight
Multifoil is a thin, quilted layer of foil and wadding. It’s the one insulation we fix to the rafters, for loft rooms and tight spaces.
Illustration: multifoil fixed across the rafters
| What it is | Layers of foil and thin wadding stitched together |
|---|---|
| Comes as | Rolls, stapled in place |
| Where it goes | Across the rafters, under the roof |
| Good for | Rooms in the roof and spaces with little depth |
| Worth knowing | Thin, so it does a different job from deep floor insulation |
What it is
Multifoil, often called superfoil, is made of several thin layers of foil with wadding between them. It works by reflecting heat and trapping still air in a very small depth.
Where we use it
On the rafters, where a room in the roof or a tight space means there’s no room for wool. The seams are taped and battens fixed over it. For an ordinary open loft, wool on the floor is still the best answer.
Is it natural?
No, it’s a manufactured material. We use it where it’s the right tool, and we’ll always tell you why.
Common questions
Can multifoil replace loft floor insulation?
Why is it the only thing on the rafters?
Where is it most useful?
Find out what your loft needs, in plain words
Tell us about your home. We’ll explain the options and send a written quote. No obligation.