Type of Insulation

[JohnC]

I was wondering if anyone could tell me the type of insulation this is. I can't recall ever seeing this type before. The house was constructed in 1930.

Thanks,

John Callan

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[hausdok]

Hi,

It looks like Silva Wool (wood insulation) in batt form.

ONE TEAM - ONE FIGHT!!!

Mike

[msteger]

Is it me or does it look either like a huge amount of mold on the underside of the roof (behind where the insulation is pulled away) or possibly some fire damage?

[mgbinspect]

Some of the old batt fiberglass insulations were adhered to the paper backing with something that looked a bit like tar - bitumen based Im guessing. And, some of those paper backings were jet black. I've see a lot of both.

[hausdok]

Hi,

Yes, it's not mold; on the vapor barrier side of paper-faced insulation the paper is normally coated on the insulation side with a thin layer of asphalt that increases the paper's ability to inhibit vapor diffusion through the batting. That's what I see there.

ONE TEAM - ONE FIGHT!!!

Mike

[JohnC]

It was not mold. It was caused from the back paper side of the old batt and it did look a little like tar residue.

John Callan