Anyone no the r rating for this insulation?

[jhittle (Jonathan T. Hittle)]

I need to find the R-Value for the picture insulation. Thanks for any help you all can offer.

[dedwards (Doug Edwards)]

It is just loose fill fiberglass (two different colors/mixed). Depends on how deeeeeep it is.

[jhittle (Jonathan T. Hittle)]

It was approximately 6-8 inches deep.

[mlarson (Michael Larson, WI Lic. # 1672-106)]

appx. R-19-21

[jhittle (Jonathan T. Hittle)]

Thanks guys, NACHI saves the day again!

[lkage (Larry Kage, CMI)]

Loose fill fiberglass has an R-value of 2.2 to 2.7 per inch.

http://apps1.eere.energy.gov/consumer/your_home/insulation_airsealing/index.cfm/mytopic=11650

[mlarson (Michael Larson, WI Lic. # 1672-106)]

@lkage

Loose fill fiberglass has an R-value of 2.2 to 2.7 per inch.

http://apps1.eere.energy.gov/consumer/your_home/insulation_airsealing/index.cfm/mytopic=11650

That seems on the low side.

I checked a number of sources and they vary but I didn’t see others that low.

I use R-19 = 6" as that is what you generally how you see 6" fiberglass batts listed.

[wwilson3 (Wayne Wilson, TN 439)]

Here is a link i use there is lots of info
http://www.ornl.gov/~roofs/Zip/ZipHome.html

[lkage (Larry Kage, CMI)]

@mlarson

That seems on the low side.

I checked a number of sources and they vary but I didn’t see others that low.

I use R-19 = 6" as that is what you generally how you see 6" fiberglass batts listed.

Yes, batts typically have a little higher R-value.