• 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 cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nancy Reading
  • Carla Burke
  • r ranson
  • John F Dean
  • paul wheaton
  • Pearl Sutton
stewards:
  • Jay Angler
  • Liv Smith
  • Leigh Tate
master gardeners:
  • Christopher Weeks
  • Timothy Norton
gardeners:
  • thomas rubino
  • Jeremy VanGelder
  • Maieshe Ljin

Hempcrete, amount of hemp?

 
Posts: 2
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I'll try not to be long winded, but it is hard.

I'm investigating using hempcrete as a source of insulation for a home I'm planning in my head. Nothing is set in stone now, besides I want to use natural building techniques.

I would like to know if anyone has a sort of amount of hemp needed per square foot, or something similar. Looking to use the 4 1 1 measurement of hemp, lime, and water.

Any pointers would be appreciated.
 
pollinator
Posts: 561
121
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Welcome to Permies; and congrats on keeping to your goal of short and to the point.

1 33# bag of hurd will make 4 cubic feet of insulation, according to this supplier, American Hemp.  How much you compress your mix will effect volume, of course.  

Supplier's page.
 
Apprentice Rocket Scientist
Posts: 264
75
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
hello , good idea to start out thinking of the volumes and amount required ,my own on- going projects required building a 55 foot by 30 foot shed with a concrete floor to store bales of material ,bags of lime by the pallet load , and store /shelter the mixer and telehandler plus myself out of the elements so i could mix and pour at my own pace----a perhaps bit over the top but i cant see how i could have managed or progressed through out the year . The bales i have hold 25 kilograms of compressed material which make up 200 liters by volume of final mix , so that times 5 gives me one cubic meter of mix , so the next step is to do measurements of wall s floors ,roofs  by length ,height and thickness or depth of insulation you want   ,break this it down into a wall or floor section at a time then add them all up to give a rough total volume.This volume wont change much by adding in the proportions of lime and binder plus water to it---but its total weight will --which will decrease again as it dries out .The costs of material and delivery are cheaper in bulk of course and thats were having your own loader pays off , and for my situation provided the power source for the mixer   , another  bespoke requirement for large batch making ---i found there was too much time and effort wasted mixing up small volumes ---less than 200 liters for me . It can be done by hand , i have done so when forced to ---telehandler blew a hydraulic hose ---and it was a few weeks down ---so it was back to manual labour ---i used an old bath tub and pitchfork --and it was an effort but not as bad as it sounds---extra help on carrying the buckets of mix was greatly appreciated though , and lots of determination required, cheers
 
Malcom Verovich
Posts: 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I'm trying to do rough, rough math on what would be the cheapest insulation to put in myself, in the future, while also evaluating the pros and cons of the insulation itself.

I'm eyeing hempcrete, cellulose, and just traditional fiberglass. I can't say which is better at the moment, but I'll try and post when I've made a decision and bounce it off of you guys.

There's just so much to look into, so little time.
 
I don't even know how to spell CIA. But this tiny ad does:
Freaky Cheap Heat - 2 hour movie - HD streaming
https://permies.com/wiki/238453/Freaky-Cheap-Heat-hour-movie
reply
    Bookmark Topic Watch Topic
  • New Topic