Recycled polyester: a clean option after a messy clear-out
Made from recycled bottles, polyester insulation doesn’t itch, doesn’t hold water and isn’t appealing to pests. It’s worth a look once the old stuff is out.
Illustration: recycled polyester laid between the joists
| What it is | Polyester fibre from recycled bottles, in rolls |
|---|---|
| Where it goes | On the loft floor, between and across the joists |
| Good for | Lofts you go into often; people who dislike itch |
| Worth knowing | Costs more than mineral wool |
| Fix | Laid like mineral wool, on a clean, dry floor |
Why people choose it
It’s soft and doesn’t shed itchy fibres, so it’s pleasant if you’re in and out of the loft. It doesn’t absorb water the way some materials do, and it isn’t a food or nesting material pests prefer.
Where it goes
The same as any roll: between the joists and across them, eaves kept clear. Never between the rafters.
The catch
It costs more than mineral wool. Your quote can show both so you can compare.
Common questions
Is it as warm as mineral wool?
Roughly, for the depth needed. We’ll say what depth we suggest.
Does it stop mice?
No insulation stops mice. Sealing the gaps does.
Tell us what you’ve found. We’ll find the cause.
Describe the problem and we’ll look, explain it and quote the fix in writing. Free.