Jump to content

Loose fill cotton insulation?


msteger
 Share

Recommended Posts

At this morning's inspection, I ran across a white cotton-like loose fill or blown in insulation that was put in a few years ago. It isn't itchy like loose fill fiberglass but appears to be a bit lighter-weight and easier to move around. I asked the seller about it since it was installed 2 years back and the paperwork he had just said R-30 loose fill and it was 10" thick, appearing to be R-3 per inch. The paperwork didn't go into specifics about what type of insulation it was. Does anyone know what this stuff really is and what it is called and the actual R-value?

I did a Google search for 'cotton insulation' and similar but didn't find what I was looking for.

Thanks.

Link to comment
Share on other sites

Cotton insulation was manufactured from the late 1930s through the early 1950s. It's made a comeback in the last few years and is touted as a green building product. Some is made from raw cotton while other is recycled cloth or scraps from denim manufacturing.

I've never seen it in anything but batts. It almost looks like a really thick blanket.

Link to comment
Share on other sites

The new formulation is the white stuff and it doesn't itch at all.

The new formulation? Would that be the new formulation that they started using in 1990? My how time flies.

- Jim Katen, Oregon

Hi Jim,

Hell, I dunno. There's the older white stuff that I see that's got a different texture and is itchy - kind of looks like poodle hair - and then there's the stuff I see in brand new houses that seems to be lighter and doesn't itch at all.

ONE TEAM - ONE FIGHT!!!

Mike

Link to comment
Share on other sites

"insulfil" common in Michigan.

I have seen actual cotton loose fill, but it stunk like crazy and had an R value of "-12".

*had to come back and edit this post - insulfil has lots of definitions. Jim L's web reference shows the actual product we call insulfil.

Link to comment
Share on other sites

At this morning's inspection, I ran across a white cotton-like loose fill or blown in insulation that was put in a few years ago. It isn't itchy like loose fill fiberglass but appears to be a bit lighter-weight and easier to move around. I asked the seller about it since it was installed 2 years back and the paperwork he had just said R-30 loose fill and it was 10" thick, appearing to be R-3 per inch. The paperwork didn't go into specifics about what type of insulation it was. Does anyone know what this stuff really is and what it is called and the actual R-value?

I did a Google search for 'cotton insulation' and similar but didn't find what I was looking for.

Thanks.

Chances are that it could be Fiber Glass Blowing Wool Insulation.

JM Formaldehyde-freeâ„¢ Insulation has been around since 1999 with some degree of success. That success is dependent on the applicator and how his machine is set up.

"but appears to be a bit lighter-weight and easier to move around."

If it's installed according to manufacturer's recommended thickness and mass per unit area then it works fine. When it's installed incorrectly then you have cavitation and scouring especially in high wind exposures.

Download Attachment: icon_photo.gif VentilationAtticScouring (Medium).jpg

46.35 KB

This is the documentation that SHOULD be included with all installations, usually stapled on a web near the hatch. I've yet to see it.

Download Attachment: icon_photo.gif JM_ClimatePro.jpg

450.55 KB

That's the reason I never mention R values when I describe blown in insulation because that value is a function of density and present applications usually don't conform.

I describe it as having a thickness of Xinches.

Link to comment
Share on other sites

Bit of a topic drift.

Does anyone identify and report on insulation beyond a category and type?

e.g. fiberglass batts or blown-in cellulose

Does anyone actually report as: insulfil or a named product?

I just call it blown-in fiberglass insulation, after all it is a fiberglass product.

Link to comment
Share on other sites

Is it this stuff??

Click to Enlarge
tn_200952882944_D074.jpg

53.1 KB

Click to Enlarge
tn_200952883044_D086.jpg

60.46 KB

YES, that's the stuff. I guess it really is fiberglass. The insulation contractor finally called me back today and confirmed it. He called it "Insul-Safe". Just wanted to be sure since it didn't feel like fiberglass.

Link to comment
Share on other sites

  • 4 weeks later...
  • 1 month later...
  • 6 months later...

I believe "Insul-Safe" is one of the 'white stuff', brands and I saw one yesterday that said InsulPro on the certificate. The latter I'm not so certain of, since it was merely a glance and the first time seeing it, but "InsulSafe" is very common around here. And, as stated, it resembles cotton, but is indeed fiberglass.

Link to comment
Share on other sites

  • 2 years later...

At this morning's inspection, I ran across a white cotton-like loose fill or blown in insulation that was put in a few years ago. It isn't itchy like loose fill fiberglass but appears to be a bit lighter-weight and easier to move around. I asked the seller about it since it was installed 2 years back and the paperwork he had just said R-30 loose fill and it was 10" thick, appearing to be R-3 per inch. The paperwork didn't go into specifics about what type of insulation it was. Does anyone know what this stuff really is and what it is called and the actual R-value?

I did a Google search for 'cotton insulation' and similar but didn't find what I was looking for.

Thanks.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...