Replies

1. GBA Editor
   Martin Holladay|Feb 16, 2015 06:51am|#1

   David,
   I'm not convinced this is a stumper. It's hard to be sure from the photo, but that might simply be cellulose.

2. 
   Shane Claflin|Feb 16, 2015 07:18am|#2

   blown fiberglass?

3. 
   Tom Gocze|Feb 16, 2015 02:51pm|#3

   My first thought was urea formaldehyde, but it looks a lot more like cellulose if you focus on what is on the rafters.
   If it is friable into dust, it is more likely urea.

4. 
   Peter Rogers|Feb 16, 2015 04:59pm|#4

   The grey stuff on the rafters does look like cellulose, but I've never seen cellulose maintain a horizontal structure like it appears to in some areas down below on the floor... anyone else see what I mean? Cellulose can certainly go in unevenly if installed poorly, but unless it's wet-sprayed I've never seen it do anything like that. I'm leaning towards UFFI.

5. 
   Peter Rogers|Feb 16, 2015 05:06pm|#5

   "White, powdery" also makes it sound like UFFI... but it really does look like cellulose... man, this is really bugging me.

6. 
   David Meiland|Feb 16, 2015 05:10pm|#6

   Here is the forum thread the photo comes fromhttp://inspectorsjournal.com/forum/topic.asp?TOPIC_ID=19603and it turns out there are more photoshttps://www.flickr.com/photos/[email protected]/with/15827472191/

   I have nothing to do with this situation, just a curious onlooker.

7. GBA Editor
   Martin Holladay|Feb 16, 2015 05:17pm|#7

   Sure looks like cellulose to me.

   .
8. 
   Peter Rogers|Feb 16, 2015 05:25pm|#8

   the crawlspace is a total swamp... which explains the weird clumping I noted earlier.

9. 
   David Meiland|Feb 16, 2015 08:26pm|#9

   Nothing like a thread where the OP withholds all the really useful information until the end.

10. 
    Peter Rogers|Feb 16, 2015 11:02pm|#10

    hahaha, yeah, just cellulose.