[Strawbale] Strawbale roof insulation

[Alex Ian New]

>  (perhaps the
>pyrethroid which can stop the moth attack cannot be added in a dry
>process)

Aren´t pyrethroids those superpersistent supertoxines, that make you tear 
down the whole house when you ever want to get rid of them,  in contrast to 
natural permethrin, or do I confuse things here?

Can I expect to find pyrethroids in any comercial wool product unless it´s 
certified organic?

yours, Alex