• 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

external insulation made of hemp, plaster, lime and crushed brick

 
Posts: 3
Location: brittany, FRANCE
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Cheap, efficient, recycling materials, no lost place inner rooms , it's a good solution for retrofitting!
webpage

 
Posts: 1114
Location: Mountains of Vermont, USDA Zone 3
63
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Fire risk?
 
Posts: 554
Location: Asheville NC
8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I am a stupid american that cant read french! I do know however, that this looks like hempcrete which is reported to have an R-value of 2 per inch but I think it would test out closer to R1 per inch... thats pretty lousy insulation. I think when you add the above ingredients, they would perform more like a thermal mass than insulation...
 
pollinator
Posts: 3452
Location: Kansas Zone 6a
54
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
http://translate.google.com/translate?hl=en&sl=fr&u=http://www.apper-solaire.org/Pages/Experiences/Amet%2520Pierre%252004/Isolation%2520mur%2520exterieur%2520avec%2520du%2520chanvre%2520banche/&ei=zJbHT6CVA-iE2gW3ktWFCw&sa=X&oi=translate&ct=result&resnum=1&ved=0CDAQ7gEwAA&prev=/search%3Fq%3Dhttp://www.apper-solaire.org/Pages/Experiences/Amet%252520Pierre%25252004/Isolation%252520mur%252520exterieur%252520avec%252520du%252520chanvre%252520banche/%26hl%3Den%26biw%3D1358%26bih%3D607%26prmd%3Dimvns

Google translated link. Still hard to read.

It is not the greatest insulation according to R ratings, but it is monolithic and outside the existing mass so it works much better in real life than the R rating would suggest.

 
Brian Knight
Posts: 554
Location: Asheville NC
8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thats a good point Scott about continuous exterior insulation performing better compared to cavity insulation values but its not going to perform above its rated R value. Cavity insulation enjoys a better Rvalue reputation than it deserves because its only describing whats between the framing. In this instance however, the R value of the hempcrete (R1 per inch) is about the same as framing or wood (R1 per inch). Dont expect much continuous exterior insulation advantages with this product.
 
Posts: 15
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
my french is pretty good any specific questions?
also isn't hemp a big no-no is the US?

"I let it dry hemp tt summer and waited for the right temperature to coat "

The french version tells you in needs ALL summer to dry before you plaster it.
 
Acetylsalicylic acid is aspirin. This could be handy too:
HARDY FRUIT TREES FOR ORGANIC AND PERMACULTURE
https://permies.com/t/132540/HARDY-FRUIT-TREES-ORGANIC-PERMACULTURE
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!