Whats this?

[Wasden]

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54.04 KB What kind of insulation is this, Shredded wheat? Seriously, I don't know.

[Jim Katen]

Silva wool or Balsam wool.

Basically, shredded wood with borates to reduce its flammability.

[Wasden]

Thanks Jim. Was there a specific era it was used? Was/is it common. Any good as an insulator?

[Jim Katen]

Thanks Jim. Was there a specific era it was used? Was/is it common. Any good as an insulator?

I associate it with houses from the '40s and '50s. I've only seen it a half dozen times or so - it wasn't common in my area. I see much more Kimsul from that period.

No idea how effective it is as an insulator.