Type of insulation

Originally Posted By: Steve Costa
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What is the proper name for insulation that is grey in color(looks like dryer lint) and looks to have ground up paper in it. This was in a 2 year old home attic. Is this Rock Wool? Sorry dont have a pic. Also how would I know what the R value is ? It was about 6" thick. Thanks Steve


Originally Posted By: Guest
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cellulose.


Originally Posted By: Steve Costa
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Thanks Chad, you wouldnt happen to know the R-value per inch would you? I think its about 3.7 but Im not sure.


Originally Posted By: Guest
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it’s virtually the same as fiberglass.


Originally Posted By: Blaine Wiley
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Cellulose has an R value of 3.2 per inch.


Originally Posted By: chorne
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Hi Guys


Cellulose R-Value

3.5"-R-13
5.5"-R-19
8.5"-R-30
10.5"-R-38

Carla ![icon_smile.gif](upload://b6iczyK1ETUUqRUc4PAkX83GF2O.gif)