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  #1  
Old 5/16/18, 8:07 PM
John Cahill, TREC 855 John Cahill, TREC 855 is offline
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Default Cork insulation?

Home built about 1950. Looks like cork insulation on air ducts. Take a look at the image. I have never seen this. Any information?
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  #2  
Old 5/16/18, 9:32 PM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
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Default Re: Cork insulation?

Quote:
Originally Posted by jcahill View Post
Home built about 1950. Looks like cork insulation on air ducts. Take a look at the image. I have never seen this. Any information?
Cork was an exceptionable insulation back in the day mostly used on Chilled water lines industrial type. I don't recall ever observing it on supply air duct. As long as it was in tac I don't see a problem. Yours looks pretty rough



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Old 5/16/18, 10:22 PM
John Cahill, TREC 855 John Cahill, TREC 855 is offline
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Default Re: Cork insulation?

Thanks. You are correct. This home had a chilled water/boiler system when first built. I found information about Armstrong cork on the net. Here is an old booklet showing cork being used on air ducts.

Armstrong's insulation and interior finishes ; corkboard, cork covering, di corkboard, Temlok, Temok deluxe, Vibracork. : Armstrong Cork Company : Free Download, Borrow, and Streaming : Internet Archive
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