Insulating vermiculite can contain asbestos. Here is where it is found, the real risk, and what it changes when you buy.
What is vermiculite
A granular insulation (often the Zonolite brand) used in older homes, mainly in attics and sometimes in walls.
Where
- Attics (period blown-in insulation).
- Wall cavities.
The risk
Some vermiculite contains asbestos. The danger mainly arises when it is disturbed and fibres are released.
Do not touch it, have it tested
When in doubt, do not handle it: have a sample analyzed by a laboratory.
Impact when buying
Decontamination has a cost; knowing it beforehand lets you negotiate and plan.
Frequently asked questions
Does all vermiculite contain asbestos?
No, but you proceed with caution and by testing.
Can you stay in the house?
Generally yes, as long as it is not disturbed.
