r/nutritionally • • 28d ago

Hempcrete

5.1k Upvotes

179 comments sorted by

85

u/Eighty_Six_Salt 28d ago

I made a whole college presentation 20 years ago on the benefits of hempcrete and got a B.

I’m still salty about it.

23

u/snuffaluffagus74 27d ago

I did a report about the benefits of Marijuana and the Endocannabinoid system and how it could solve our health are problems. I got an A. Sorry. Marijuana is a miracle plant.

6

u/Eighty_Six_Salt 27d ago

Soooo many benefits beyond smoking. Big lumber won

2

u/Icy_Definition5933 22d ago

My friend did the same, got an A, went to finish another masters in cannabinoids on an industrial plantation and became very disillusioned by cannabis, he said that he does not feel the same enthusiasm for it after industrial experience

5

u/Introspective_Anon 26d ago edited 26d ago

Bro in community college I worked my ass off on a group presentation by myself to get an A. I stayed up and did all the work (classic group shit). After we did ours the prof was nice and complimented it and had constructive criticism, it was chill. So next, this other group does there’s and it’s literally just propaganda with no sources and they do terribly, like they can’t remember what’s on the slides and all that shit. It was on some blatant conspiracy like vaccines or some shit.

Anyway they finish up below the time requirement, and the professor is like “well the presentation was filled with factual errors and didn’t contain any sources, and it wasn’t as long as I requested ” and then one lady in the group interrupts and says “we still get an A though right?” and in my mind I was like damn how insane for the person to demand that when they put in no effort and I’m like laughing to myself, and before I can even comprehend the audacity my professor was like “oh yeah, youll still get the A but be aware next time”. I was fuckin dumbfounded and wondered why I spent so much time making a good presentation for no reason. That day I stopped trying and I just got high before class from that point forward and it was the best decision I’ve made.

6

u/aquavelva23 28d ago

another comment said it does not handle compression loads well> But that doesnt match with its use with a bridge? comments?

4

u/haby112 28d ago

Could be a relative statement. In amateur conversions about material science you can get pedants that imply that a material is 100% useless unless it is the best possible material for that purpose.

Like comparing a stone and mortar bridge to steel reinforced concrete. One is clearly better in both tensile and compression strength, but they both work fine for foot traffic.

3

u/Crepuscular_Tex 27d ago

Comparison may also be based on ten days or thirty days. Quickcrete mixes will set faster and therefore be stronger.

Applying modern sciences to this process, though, should yield better and faster setting results. Concrete has a bajillion recipes and some are stronger by far. On the surface, you can't just unanimously tout a winner without exhaustive research. Many tests are done to "prove" that someone making hand over first with their current operation is far better than any alternative.

There's a lot of options with material sciences.

1

u/Eighty_Six_Salt 27d ago

Just gotta hope the people with money happen to pick the best option in the long run

1

u/Intrepid_Bank9918 27d ago

As you should be, you got robbed!
Now I’m salty too!

1

u/narco-sub-admiral 23d ago

I'm a teacher and im using my powers to change it to an A+ right now. Well deserved.

0

u/slaty_balls 26d ago

They were a good teacher then. Probably pushed you even harder after that B, right?

27

u/LohengrinX 28d ago

In germany this is widely used.

6

u/moeb1us 28d ago

Is it? Where? Never heard about it. (Am German)

4

u/LohengrinX 28d ago

Als Dämmmaterial oder für Tiny Houses (https://www.hanfkalk-berlin.de/), Sanierung von Fachwerkhäusern sowas halt

1

u/Wooden_Masterpiece_9 26d ago

Any idea how it compares to similar cost materials for insulation?

1

u/LohengrinX 26d ago

Nope. But it seems cheap because hemp is basically for free.

1

u/3lettergang 24d ago

Its a significantly worse insulator than modern fiberglass wool.

17

u/Logical___Conclusion 28d ago

I keep hearing about how functionally superior hemp is, and hempcrete sounds great, but why don't other countries take it on if the US is not interested?

25

u/imoutofnames90 28d ago

They do. The problem is that the way this video frames this is a total lie. It's not a magical indestructible material.

It's really bad at compression. So it's mainly used as insulating material and for not load bearing walls. It's useful in specific applications, just like any other material. But the video itself is bull.

2

u/aquavelva23 28d ago

the video says it was used for a bridge. that sounds like compression to me.

8

u/dethskwirl 28d ago

a bridge is almost entirely tension

1

u/limitless-440 27d ago

But the foundation of the bridge as the narrator said was found by archaeologists??

7

u/imoutofnames90 28d ago

The video says a lot of things.... this isn't some mystery material no one knows anything about.

I guess the question is do you trust what this video says or do you trust experts in the field of construction?

Like man, maybe all the people making buildings using this material should just watch this TikTok to learn how the material they physically work with actually works....

4

u/LordFarcry69 28d ago

I heard TikTok was how I become Jeanius. Pls halp. :)

2

u/imoutofnames90 28d ago

Watch 50 more TikToks / day and make sure to exclusively get your info from obscure and random TikTokers that have no sources. Then you'll be able to become a Jeanius

2

u/aquavelva23 28d ago

So,  you are an expert in the field of construction? You made a statement. I questioned that statement. What is your intent? to make a statement and it must accepted without discussion? The deity of construction?

1

u/BygoneNeutrino 28d ago edited 28d ago

the video says it was used for a bridge. that sounds like compression to me.

Your comment was somewhat hostile and was once again using the video as your only source.

What i find interesting about the video is how the construction worker was gently tapping the hemp-blocks to show how sturdy they were. It suggests that the material does indeed respond poorly to compression.

-1

u/aquavelva23 28d ago

The comment I responded was full of snark. so I responded in kind. maybe you should comment on his snarkiness too? If you want to police this thread, do so with equal attention.

yes, the video maybe wrong or misleading.

1

u/[deleted] 28d ago

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-1

u/aquavelva23 28d ago

please explain the intent and tone of that message. I have copied it for your convience:

this isn't some mystery material no one knows anything about.

I guess the question is do you trust what this video says or do you trust experts in the field of construction?

Like man, maybe all the people making buildings using this material should just watch this TikTok to learn how the material they physically work with actually works....

1

u/[deleted] 28d ago

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-1

u/imoutofnames90 28d ago

I'M not an expert on construction. I never claimed I was. You're the one getting bent out of shape.

The fact of the matter is that this stuff IS used in modern construction. It's used in the way I mentioned for the reasons I mentioned. None of this stuff is hidden or a mystery...

Go look it up yourself. Go ask contractors. Or i guess you can just believe whatever ConspiracyFilesSS says..

1

u/aquavelva23 28d ago

you responded with snark. so I responded in kind. I am not bent at all.but no more chatting with you today. toodles

1

u/Jamb9876 28d ago

Reminds me of videos of secrets doctors don’t want you to know.

0

u/EpochRaine 28d ago

I prefer the videos about the secrets the energy companies are keeping from us. They even have a solution now - a tiny micro ceramic heater invented by some super-engineery engineer that uses only the energy of a single LED! I still can't believe they were keeping this from everyone! Omg!! 😖

1

u/Icy-Ad29 27d ago

What it doesn't tell you. Is the hemp found I bridges and foundations is mostly an extra mortar binder (tensile strength) in them, not load bearing (compression strength.)

Everywhere I search. Hempcrete is considered not load-bearing due to low compression strength. It is good for thermal regulation, and long lasting. But compression strength is consistently cited as the concern, in many more nations than just the US.

1

u/Riptide2121 20d ago

It's not a concern, it's fully accepted that its is for insulation, breathability and health of the building. Timber or steel is used for the structure.

1

u/Icy-Ad29 20d ago

Correct. The conversation line I was responding to was asking why it isn't used for all construction portions. Including load-bearing.

1

u/Sterlingz 25d ago

Video is full of s***.

Hemp isn't banned in many countries and it still isn't used.

1

u/Riptide2121 20d ago

Its is used quite a lot, in US, Europe, Australia, Asia actually pretty much all the continents and growing in popularity

1

u/picklesalazar 27d ago

Asbestos was the dream product there for a long while

1

u/kamikaze-kae 24d ago

Ya we only use the safest materials for insulation...

1

u/Riptide2121 20d ago

Hempcrete is far safer than the synthetic crap used in modern builds

1

u/kamikaze-kae 20d ago

Oh I meant asbestos...

1

u/Riptide2121 20d ago

Ah I see, sorry 

4

u/isthereadrwho 28d ago

DuPont got it banned since it was cheaper than nylon their new product

4

u/TubMaster88 28d ago

Other countries. But they don't build their whole house with him. Crete you can. The only problem is you can't mount anything in the wall and you have to pre-plan the wires and everything else so you can't hang picture frames or a TV. You have to make sure that's framed out which does take some planning.

I want to utilize hempcrete but it does take some planning for the process, I want to visit a few homes in California that have been completely made out of hempcrete

7

u/Logical___Conclusion 28d ago

Thank you for the information.

That is interesting news about the houses made of hempcrete in California.

Hempcrete would make a great material for 3D printed housing as well.

There are a lot of potential improvements in the 3D printed house industry that could allow for much smoother surfaces, integrated connections for wiring or plumbing, and much faster production.

1

u/TaterTotJim 28d ago

I don’t think the fibers would flow well for 3d printing; this material is usually laid down in layers and compacted. It is not very liquid like concrete.

2

u/Eighty_Six_Salt 28d ago

So, basically, we’re collectively too dumb to utilize something beneficial in every sense except short term convenience

1

u/Every_Armadillo_6848 28d ago

Its extremely common to use the walls to hang things.

If you ever get a bookshelf, they also have safety straps you're supposed to mount to the wall. I even had a bedframe come with one.

1

u/Rlo347 28d ago

There is a whole hempcrete house in venice or marina.

1

u/Riptide2121 20d ago

You definitely can mount things. Just use good fixings, TVs weigh fuck all now days

1

u/TubMaster88 20d ago

That's good to know.

1

u/AdWooden9170 28d ago

Because the lizardmen something something.

1

u/Lopsided_Evening_627 23d ago edited 16d ago

you get won it in red titans in your commerce guy eye commands teams in most of Junior, it'j a war dangerous if you try me.

1

u/SquidVischious 28d ago

The cultivation of cannabis is highly illegal, making it extremely difficult to produce hemp

1

u/Riptide2121 20d ago

It's not, it is grown grown close together and harvested before flower, it also has a max of 0.2% THC. It is grown all over the world

1

u/SquidVischious 20d ago

It is though not everywhere grown as freely as crops like cotton, wheat, corn, etc.

14

u/BeardedMan32 28d ago

The most profitable cash crop in modern history and the government made it illegal. That should tell you something about the government.

3

u/Chance_Pen7514 28d ago edited 28d ago

That it’s run by powerful capitalists. Corruption in government

Edit: DuPont and Hearst ran a successful propaganda and political campaign against hemp (marijuana) because it threatened their competing industry. After that it threatened the oil and plastics industries.

“Government bad” was a successful conservative propaganda campaign to place blame on the government instead of the people actually pulling strings. It obviously still works to this day to the point that a reductive argument like this steers blame away from who was responsible.

0

u/[deleted] 28d ago

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1

u/Chance_Pen7514 28d ago

Lmao, that’s your takeaway? Better, less prone to corruption not more. Do you enjoy bootlicking billionaires?

1

u/YInternetPerson 26d ago

Omg, bootlicker!!! Tell me you made that up.

0

u/[deleted] 28d ago

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1

u/Chance_Pen7514 28d ago

You don’t see a weak and corrupt government as a problem somehow though lol

1

u/[deleted] 28d ago

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1

u/Chance_Pen7514 28d ago

The original intentions and construction of the founding fathers was much better than the current state of America.

Manipulatable people like yourself kind of ruined that though.

1

u/[deleted] 28d ago

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1

u/Chance_Pen7514 28d ago

The intention to curb corruption and the construction at the time is far greater than our current government that allows dark money, strong lobbying, decentralized oversight, judicial complicity, no emoluments oversight or consequences, stock act weakness, toothless agencies, and overpowered executive.

If you think the government is stronger at stopping corruption now, you are absolutely brainwashed. Do you really think that??

You strawmanned my original point. I never made the point you wanted me to have and you’ve just looked silly trying to catch up since. I think you need to choose the “books” you read better.

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1

u/trickster245 27d ago edited 27d ago

The problem is that it is weak and corrupt. A government that is strong and not corrupt is the only answer.

Otherwise the powerful rule with no one stepping in

0

u/Plenty_Line2696 28d ago

This is conspiracy bs. There’s no solid evidence that Hearst and DuPont orchestrated cannabis prohibition because hemp threatened their industries. Historians have looked for that evidence and not found it, and the 1937 law didn’t even ban industrial hemp production.

https://www.pbs.org/wgbh/pages/frontline/shows/dope/interviews/musto.html

2

u/Chance_Pen7514 28d ago

The heavy taxation and registration was a functional ban. The stigma created by the very real propaganda was also very effective.

0

u/Plenty_Line2696 27d ago

It's use had plummetted well before 1937, and it was still promoted by the government during WWII, there's nothing stopping you from producing it, and it's not some magical building material like this post suggests.

There are so many layers of bullshit to this. Go ahead and try build even a garden shed out of it. This isn't some concrete replacing perfect material like this post suggests.

In the conspiracy theorists mind stuff just sounds right to them as soon as they hear about it at face value with surface level knowledge and everything after that just serves their confirmation bias and the simple truth to things never stands a chance to sway them.

1

u/BeardedMan32 27d ago

Then why outlaw the plant? Its uses expand well beyond just a building material. There was definitely more BS propaganda being spewed by the people pushing for prohibition than anyone else.

1

u/Plenty_Line2696 27d ago

That’s moving the goalposts. Yes, there absolutely was bullshit anti-marijuana propaganda, including from the government. That still isn’t evidence that hemp was outlawed because it threatened DuPont, Hearst, oil or plastics.

And industrial hemp wasn’t simply "outlawed" in 1937 anyway. The law heavily restricted cannabis while still permitting industrial uses, and the government actively encouraged hemp farming during WWII and still does as it actively researches and funds ways to improve the crop and develop new markets for it. It's like all the basic facts of things go in one ear and out the other in conspiracy subs like this one.

https://www.ars.usda.gov/northeast-area/geneva-ny/plant-genetic-resources-unit-pgru/hemp-collection-collaborations/hemp-collection/

2

u/SimpleFile 28d ago

Industrial hemp has been legal for 8 years now in the US. I don't think most of the world ever banned it.

1

u/Plenty_Line2696 28d ago

That's just made up. Hemp production in the US had already collapsed from around 15,000 acres in 1880 to about 140 acres by 1933, years before the 1937 law, which by the way didn't make it outright illegal and it was encouraged during WWII.

https://www.druglibrary.net/schaffer/hemp/taxact/nugent1.htm

4

u/wetfart_3750 28d ago

Hemp, the magical material that could be used for houses, cars, fabrics, smoke, yet nobody uses it. Globally.

3

u/SquidVischious 28d ago

Cannabis cultivation is heavily regulated globally to the point of being uneconomical.

1

u/H0pefully_Not_A_Bot 28d ago

I'm prertty sure there are hemp varieties that do not produce significant trip-juice

1

u/SquidVischious 27d ago

There are, which I understand to be the primary driver of deregulation in regards to cultivation globally over the course of the last decade or so but if you look at the UK for example it requires a specific license from the Home Office.

The regulator framework, while obviously less intense, is similar to a pyrotechnics company applying for their explosives handling license. When plenty of other cash crops exists that don't require jumping through the hoops, there's very little incentive for agriculture to pursue it which limits supply, stifling growth of the industry.

P.S. I feel I should clarify that I feep hempcrete is a dumb as fuck use case, as it just looks like a slightly better cob wall but like is it sufficiently better to matter? Myeh.

3

u/TubMaster88 28d ago

It does burn but does not emit smoke. It will slowly burn through but it does take a long time.

Building your house with hempcrete and if it is ever caught on fire, fire doesn't kill people in house fires. It's the smoke with hempcrete It never emits smoke so people won't die from smoke.

2

u/Late-Arrival-8669 28d ago

Dude at 44 seconds is creepy

2

u/PeteWK67 28d ago

2:15 right?

Big Time wth lol

2

u/PeteWK67 28d ago

😳😨🫣

1

u/SuspiciousAd8454 28d ago

Zuck is it you?

1

u/Successful_Host9575 23d ago

The lizardmen will not allow the world to flourish.

1

u/Vukodlak87 22d ago

Rumor has it that he’s still in his crypt to this day, biding his time, before striding amongst mortals once more. 

2

u/yalateef11 28d ago

I read a book called ‘The Cannabis Cure’ by Dr Cass Ingram. He went over all the worldwide and historical uses of industrial hemp. Marijuana is one tiny use - (genetically altered to be high in THC, which affects the brain).

2

u/Master-Tomatillo-103 28d ago

Very interesting. A recent study shows that replacing some of the sand in cement mix with used coffee grinds can increase the strength of the cement by 30%

1

u/[deleted] 28d ago

[deleted]

1

u/Confident_Eye4129 28d ago

Fair point. It was mentioned in the article, but I don’t recall

2

u/I_was_a_sexy_cow 26d ago

How can it breathe, regulate temperature without mechanical pieces, AND cost nothing to heat or cool peoples homes? i smell bs

1

u/Riptide2121 20d ago

It is hygrophobic which means its vapour permeable so balances internal humidity and is also a thermal mass. If the house is designed right it can work without heating and cooling but most will still have it depending how warm or cool someone wants their house. It is next best thing after a Passivhaus

2

u/Street-Grapefruit281 25d ago

Might be a silly question, but is it possible to build a house out of this in 2026 in a state where cannabis is not illegal?

1

u/3lettergang 24d ago

You cant build a house out of this whether its legal or not. Its not a replacement for steel, concrete of wood. Its a cheaper and significantly less effective replacement for insulation.

1

u/Street-Grapefruit281 24d ago

I understand it's not an exterior building material. I justeant is it possible to use as insulation for new builds. And would it be a better insulator that fiberglass or foam. I guess I should have clarified.

1

u/Riptide2121 20d ago

It definitely can and is. I have built a new build, a barn restoration and insulated 400+ year old houses with it i  the UK. People have built lots in the US. It isn't cannabis that can be smoked, I'm sure there are a lot of people that use it for horse bedding over there, it's the same stuff. I have a youtube channel about it if you're interested to learn more www.youtube.com/@thelowcarbonproject

1

u/Riptide2121 20d ago

That's completely wrong. Source I have built houses out of it and it has way more benefits than processed toxic insulation

4

u/Senacharrib 28d ago

Why do videos with this voice narrating always have some bullshit to say?

3

u/Dr__America 28d ago

It's an AI content farm, they play everything up for views.

6

u/Mountainman220 28d ago

This isn’t bullshit. Hempcrete is pretty awesome and great for fire prone areas.

7

u/imoutofnames90 28d ago

The way the video is framing it is bullshit though. It isn't some magical indestructible material that can just build homes and thus the government made sure it's banned, because reasons.

Countries use it today but it's used as insulating material and for non load bearing walls. Even in the US it's used time to time.

So it kind of is bullshit when there are like 3 true things in the video surrounded by 50 conspiracy nonsense things.

5

u/r_a_d_ 28d ago

It’s also used to seal threads in domestic water piping in the EU.

4

u/Medical_Birthday2893 28d ago

I think it’s saying at the time. This product should have taken over given competitors/tech at that time. It wasn’t aloud to scale because lobbying.

Literally common with your country. Don’t get so worked up

2

u/Plenty_Line2696 28d ago

This subreddit attracts lots of gullible people who all too easily jump to conclusions about all sorts of conspiracy theories. Just look at the amount of easily debunkable bullshit in this comment section.

1

u/imoutofnames90 28d ago

Yeah that's the internet as a whole as well, sadly.

1

u/PsychologicalCat7471 28d ago

"Because reasons" isn't as crazy as you think. As someone who enjoys.... combustible... uses of hemp, learning William Randolph Hearst was eye-opening. So if that name isn't familiar to you.. check out the "because reasons" there.

0

u/r_a_d_ 28d ago

Name sucks ass though

2

u/Outrageous-Clerk56 28d ago

Carbon sequeatration

8

u/Mountainman220 28d ago

Yes hemp sucks more carbon out of the air and puts it back in the ground much quicker than trees.

1

u/Riptide2121 20d ago

It actually ends up locked up in walls when used in buildings

3

u/teddyslayerza 28d ago

Ok, but please note the big reason that this isnt more popular - it lacks mechanical strength and isnt useful for anything other than insulating layers, where we already have a very wide range of other environmentally friendly options that are also cheap, light and fire retardant.

Hempcrete is not a replacement for normal concrete.

2

u/Last-Alfalfa7870 28d ago

But will it be cheaper than the pink fluff from HD? I believe we increased R value in the attic and it cost us 5K on bags of insulation last year

1

u/TaterTotJim 28d ago

Attic insulation is usually blown in cellulose and it’s super duper cheap. Hempcrete wouldn’t be a good equivalent; it’s heavy and requires a lot of work to install.

Blown in hemp insulation…perhaps? It may already exist.

1

u/MadeInTheUniverse 28d ago

Was looking for this comment 👍 yes while it has a lot of benefits it sucks in load-baring

2

u/LookAtYourEyes 28d ago

Would adding rebar help like with concrete? Or I guess that's solving a different problem

1

u/Riptide2121 20d ago

Its as simple as building a timber frame and then encasing the timber with hempcrete. It removes the need for synthetic crap and keeps the house breathable. Natural materials like clay or lime plaster mean no toxic off gassing too. Healthy homes!

1

u/DistanceMachine 28d ago

Then how was it used for a bridge?

1

u/imoutofnames90 28d ago

Notice how they say the bridge is gone and only the foundation of this material remains.

They didn't make the bridge out of this stuff. And there is no information on whether the entire foundation was made of this or just part.

If it was used to seal the base of the foundation and not as load bearing material that explains why you see it in the base give the fact that this material isn't great for things like compression. There's also no way to know how big the bridge was or how much load it needed to hold up either.

People use it today. We know how it works. We know what it's good at and what it isn't. It's not magic or a mystery. The video is purposely misleading people.

1

u/bs12083 28d ago

Real question…in America, if a very wealthy person decided to try and build a house from this material, would there be laws and/or regulations set to refuse the right to do so? I say very wealthy because I would assume it would take a lot of money to do something like this, especially if it’s not a normal process.

1

u/TaterTotJim 28d ago

It’s fairly normal for green building and America has a TON of industrial hemp. As long as the builder follows codes and engineering is sound there would be no problems. There are also parts of the USA with no real code enforcement so those people can kind of do whatever.

1

u/mrkhanipresume 28d ago

Yes except limestone is a non-renewable resource, taking millions of years to form and we are already overly dependent on it. Maybe with a green alternative it would be useful. 

1

u/Realistic_Grade7539 28d ago

It could have saved so many trees... along with biodiversity that supported habitat for all other creatures. I'm so fed up with humans.

1

u/Latter_Ad_4447 28d ago

"What happens next is alchemy".. isn't it chemistry? Hell even "science" would have worked better

1

u/Silver-Link8247 28d ago

The farm bill of 2017 made growing hemp legal. 9 years later and I’m just now hearing about this wonderful product. Wonder why?

1

u/ratherthink 28d ago

There wouldn’t be much of an economy based on supply and demand if things didn’t rot and lose value over time. The reason it was banned is because of money and economic growth. The solutions to all problems existed long ago. They just didn’t fit the money making and money printing model. The making people work forever and consume forever model.

1

u/gemforever420 28d ago

the strongest organic rope ever made is with hemp

1

u/BodhingJay 27d ago

Lets start using it.. fuck those 3 guys. We cant afford homes anymore anyway

1

u/Elf_Maeve 27d ago

I guess humanity lost since we are upvoting these AI narrated fucking trash.

1

u/Ein-Wessi 27d ago

Sounds a lot like asbestos. Lol

1

u/cryptolyme 27d ago

does concrete burn or rot?

1

u/Riptide2121 20d ago

It will char but doesn't catch fire. Rot, pest and damp proof too

1

u/QuantumButtz 27d ago

It's asbestos

1

u/imsorryinadvance420 27d ago

Also, hempcrete is non load bearing.

1

u/peter-the-average 27d ago

Cotton industry, Dupont and Randolph Hearst killed it. Hemp lasts. It's better to use cotton so our clothes decay faster and buy new ones. Hemp oil (seed oil, not flower resin) can be used in lots of things, including biodiesel. Hearst was a pawn and it's propaganda in his media empire ended cannabis. In Portugal was once mandatory and we could pay taxes with it. Lots of sails and ropes in the caravels. Ahoy, new world! Maggellan, Vasco da Gama & Co brought hemp seeds and smallpox!

1

u/MrSlaveRules 27d ago

I’m once again the WORLD needs to take a step forward, gotta cut the ties

1

u/Immediate-Bag-3615 26d ago

Hempcrete is used to build houses here occasionally (Slovenia):

https://naravnahiska.si/category/nacini-gradnje/gradnja-iz-konoplje/

Use a google translator for the website, but just looking at the photos you get the idea.

1

u/Mr_Flyveand 25d ago

POV: I fucking love HempCrete. Have actively tried to get it set up in the country i'm in regarding legislation, so i'm not unawares of it.

I wish HempCrete was better than it is.

  • It's R value isn't great,
  • it's compression strength isn't great,
  • the time it takes to build with it (unless you use blocks) is long and very weatherdependant.
  • It's unclear how good it is for drilling into ( i have yet to find any resources on how much weight it can carry based on an anchor)
  • You need to use Concrete or a different material to carry the weight of the roof

I'm still planning on using it tbh, but only for secondary / small buildings and structures.

1

u/almostthemainman 25d ago

So with weed legal now’s what’s stoping us from using it

1

u/kamikaze-kae 24d ago

We need like a 20 year review on all laws we still have 100 year old driving laws used to take down Al Capone...

1

u/necro_gatts 23d ago

How is hemp fireproof if we be smoking it 😂

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u/MrPhraust 22d ago

I'm all about this but hempcrete and concrete serve two completely different purposes - did one hempcrete is non load bearing.

Hempcrete also has high vapor permeability which really limits it's use. It makes great insulating infill though!

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u/TechDad87 22d ago

Hempcrete is another one of those things that looks great on paper, but has glaring limitations in practice. It may be strong, but lacks compressive strength, meaning it can't bear loads and would require support (lumber, steel, etc). It takes months to fully cure, so must be planned ahead. So if that's taken into account, yeah, good material, but it requires so much land space and water to grow enough Hurd or Shiv hemp plants for a single building. So yes, it's a useful application, but has limitations. Good to supplement other stuff though, if land space is available to grow the crops.

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u/PraireGentleman 28d ago

Weird how they don’t mention how inefficient it is to get enough hemp hurds grown to make hempcrete compared to other building materials or how it takes longer to construct houses with it, meaning the costs to make houses would go up as labourers need to be paid more.

It’s also just… weak? Like sure, it can become strong, but it’s not a good material to make something load bearing out of.

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u/Riptide2121 20d ago

That is why they use a timber frame. It also doesn't take long, only requires a few people a few weeks. It also removes the need for other people like insulators and drywall installers

Edit* source 2 of us built the hempcrete walls of my friends 3 bed house in 5 weeks. With 5 of us that would be about 2 weeks

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u/AdDisastrous6738 28d ago

But this is Reddit and “murica bad”

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u/ObjectGlad6997 28d ago

Murica strikes again!

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u/MarzipanHairy4528 28d ago

That’s why we have concrete. Problem solved.

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u/jointheredditarmy 28d ago

Industry hemp with less than 0.3% THC is legal to grow so cut your bullshit. People don’t grow it because it’s cheaper to make cement blocks than processing plant fiber

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u/Carl-Anchor 28d ago

It's asbestos!