Name that insulation

This is a new form of insulation I've not seen before, clinging under the attic rafters of a 1902 home in Berkeley, Calif. Can you name the bird or other critter that's developed this unique form of insulation? The white lines are plaster "keys" poking through the lathe between the ceiling joists.

Views: 211


You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by Chris Heenan on December 1, 2011 at 4:26pm

this one is creating a buzz

Comment by Guy DuBois on August 20, 2011 at 8:07am
I dare you to poke it with a stick!
Comment by hollis micklon on July 6, 2011 at 6:58am
I recently removed honeycomb with honey in it-20 lbs-have pictures too!
Comment by Bruce A. Bailey on June 30, 2011 at 8:17am
I agree with Ed. Looks like an old Hornets nest.
Comment by Barry Zeeuw on June 27, 2011 at 11:41am
Is Berkeley anywhere near the Mission of San Juan Capistrano?
Comment by George Kopf on June 20, 2011 at 10:28am
What are the dimensions (roughly)?
Comment by Ed Ballard on June 9, 2011 at 5:28pm
Looks like a hornet's nest to me.


  • Add Videos
  • View All


Latest Activity

Benny hani replied to Benny hani's discussion Manual J online
"Thanks Bob"
43 minutes ago
Benny hani replied to Benny hani's discussion Manual J online
"Thank you Isaac"
45 minutes ago
Bob Blanchette commented on Amber Vignieri's blog post Even with Polar Vortex, Hourly Pricing Participants Saved
"Looks like the days of paying a fixed amount per KWh are rapidly coming to an end. Many utilities…"
2 hours ago
Bob Blanchette replied to Benny hani's discussion Manual J online
"Be sure the size that you ACCURATELY calculate actually gets installed. Often…"
2 hours ago
Bob Blanchette replied to Sean Lintow Sr's discussion Water Saver or Gimmick? in the group Best Practices (Residential)
"The problem is these devices NEVER pay for themselves. Water is cheap, about $3 per 1,000 gallons…"
2 hours ago
Bud Poll replied to Rob Madden's discussion Blower Door Testing on Energy Star v3 home
"Where was the blower set up, front door, other?  Was if located in an unobstructed area, not a…"
14 hours ago
David N. Armington liked John Poole's discussion Two Part Epoxy and Repair of Structural Wood
David N. Armington joined John Poole's group

Historic Home

Historic and vintage homes are significant to our cultural heritage, yet often lack energy…See More

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service