Wermit, what is this?

[RiKr]

Hello, I'm working on a school project and need to interpret a building permit drawing from 1974. According to the drawing, the interior material should be "wermit" 20mm, which is placed on sparse paneling. But what is "wermit"? Anyone on the forum who knows and is willing to share the information, it would be greatly appreciated.

Thanks in advance
/Felix

 

[KnockOnWood]

Try googling vermit instead, and you'll get here:
http://www.vermit-group.si/en/Applications/Construction-insulation