I did an audit last week of a home built in 1992.  The attic insulation looks like a coarse, dark, insulation cellulose.  I haven't run across this type yet and am not sure of the exact name or R-value.  Any help would be appreciated.  See photo.

Views: 1272

Reply to This

Replies to This Discussion

Hey, Rob

 

Based on the photograph that almost looks more like Rockwool than cellulose -- does it have a more irritating fiberglass feel to it?  If so, I'd definitely say rock wool.

 

Hope that helps,

Anthony

Anthony,

Thanks for the reply.  It really doesn't have an irritating feel.  Rockwool is pretty consistant in color and texture.  This looks like a recycled material.  Little varied in color and texture.  Also looks like little pieces of cardboard in it.

Rob,

 

This appears to be a cellulose type insulation. Recently we have seen more manufactures use recycled cardboard in their manufacturing process because it is less costly, and abundant for them to purchase. It could very well be one of the first cuts at using the cardboard in lieu of newsprint to produce the cellulose insulation.

 

I hope this is helpful.

LOL,

 

Call the DEA!

If you don't see newsprint (letters) and you don't smell iron, it coudl be a blown fiberglass that was made by chopping up batts. 

Rockwool will usually give you an iron taste in your throat even through a mask. 

I haven't heard of the cardboard cellulose stuff before. 

Some cellulose uses ammonia sulfate as a fire retardant and if you get it wet it off gasses ammonia.  Try dampening a little and see what you smell.  Some cellulose uses Boric Acid as fire retardant, and that will not off gas ammonia, so this test is not difnitive, but it is easy & cheap. 

There are cotton batts and cotton blown insulation products in the market, but they are usually denim products, and blue in color.  maybe someone is cutting up Carharts? 

Try setting some on a fire proof surface (dirt) and hitting it with a plumbers torch,  if it melts quick, it is likely fiberglass.  if it just laughs at you it is probably rock wool. if it chars it is probably cellulose.  I am not sure what a cotton batt will do in fire. 

Pat:  I wasn't aware rock wool was a good flame retardent.  Why is that?  Thanks.

i wouldn't call it a flame 'retardant' it is basically spun out iron slag, so it has a melt temp up around 4500 degrees F, and it will not burn.  it also has a very high density, so it is frequently used in commercial work in partitions for sound attenuation. 

 

thermafiber is a trade name, there may be others.  bear hair is a vernacular name.    

 

I have seen cellulose go from grey to brown in color with prolonged exposure to light.  i think this is the same as newspaper that browns over time with exposure to light.   

RSS

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

David Holtzclaw replied to Steve Mann's discussion Alnor 6200 LoFlo Capture Hood in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi Steve I'm interested 402-213-3788 dholtzclaw@transductiontechnologies.com thanks david "
7 hours ago
Eric Kjelshus replied to Steve Mann's discussion Alnor 6200 LoFlo Capture Hood in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"call me Monday 816-537-5100 "
7 hours ago
Steve Mann added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Alnor 6200 LoFlo Capture Hood

I've got an Alnor 6200 Balometer (Flowhood) I'd like to get rid of. No longer needed--I have a big…See More
8 hours ago
Paul Raymer posted an event
Thumbnail

MA Crew Chief/BPI Building Analyst Training at Bristol Community College at Commonwealth Landing

September 12, 2016 at 9am to September 16, 2016 at 4:30pm
Bristol Community College has created a hands-on training cabin in their laboratory.  This class…See More
12 hours ago
Daniel Morrison replied to John Nicholas's discussion Slab Edge Insulation - A Side Thread to Melissa's Question
"John, I just collaborated with Steve Baczek on a few videos for ProTradeCraft about slab insulation…"
19 hours ago
Profile IconMichael Sumpter and Bill Gartner joined Home Energy Pros
yesterday
Malcolm Jackson joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
yesterday
Amber Vignieri liked tedkidd's discussion What if more efficient homes were actually worth more?
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service