• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • Anne Miller
  • Pearl Sutton
  • r ranson
  • Mike Haasl
  • James Freyr
stewards:
  • paul wheaton
  • Joylynn Hardesty
  • Burra Maluca
garden masters:
  • Steve Thorn
  • Greg Martin
gardeners:
  • Kate Downham
  • Jay Angler
  • thomas rubino

Adding straw insulation to small home.

 
pollinator
Posts: 325
Location: Victor, Montana; Zone 5b
91
hugelkultur forest garden food preservation
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I am wondering if anybody has seen insulation added to the exterior of a building using wire mesh and straw. I am thinking of wrapping a small building with flakes of straw held in place with wire mesh (chicken wire) and plastered over with natural plaster. Any links, ideas for alternatives are much appreciated.
 
Posts: 698
26
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You add the straw to the clay plaster, not plaster over loose straw. The straw addition has been proven to pass moisture better (increase perm rating) than clay alone and stiffen it, and it increases the insulation value a little, not much. Straw is only a really good insulation and a moisture manager when it's density is between 5 -12 PCF in a tied bale, more insulation at the lower on the order of r-30-50. I would not expect as good performance out of a loose fill, or batt. The bale pore size plays a large benefit for vapor diffusion and drainage, one of the best out there if you don't mind the large footprint on the ground.

Here are some properties: http://www.ecobuildnetwork.org/images/PDFfiles/Straw_Bale_Test_Downloads/moisture-properties_of_plaster_and_stucco_for_strawbale_buildings_straube_2003.pdf
 
You have to be odd to be #1 - Seuss. An odd little ad:
Heat your home with the twigs that naturally fall of the trees in your yard
http://woodheat.net
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!