What is the r-value of Johns Manville spintex bat insulation product # HI-82B?

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This is what is currently in my attic. I'm looking to find out wether to replace or add on top of this 1950s insulation.

2006-10-14 09:07:37 · 2 answers · asked by ed 1 in Home & Garden ➔ Do It Yourself (DIY)

I checked their website and Product Data sheet and there is nothing under this #. Perhaps if you have any more information.

2006-10-17 01:51:46 · answer #1 · answered by HomePapa 3 · 0⤊ 0⤋

r= 2 or 3 /inch. add insulation like crazy. got 16" cellulose in my attic. pays 4 itself.

2006-10-18 06:18:47 · answer #2 · answered by enord 5 · 0⤊ 0⤋