Haha that sounds nice. We've actually recently been having conversations around hemp domes. Have you made one yet?

Yes it is but not as much as it could / should be. When hand placing, we use east Yorkshire henp but with spraying, they use hemp from france. That stuff is actually horse bedding and can be purchased from lots of places in the UK.

You could but it would have to be painted and would cost a lot more than a timber frame. We recently did a historical building that was strapped together with painted steel but that was just reinforcement on the old stone and bricks

Sure is 🍻

You're welcome, glad you like it 🍻

The fibres were just what the manufacturer supplied and recommended for use with this particular product, but agree, it would have been nice if we could have used hemp instead.

I've just answered one of your other comments but I would be happy to have a chat with you online if you want. I don't claim to know everything but have learned a lot over the last couple of years and have access to Graham who knows pretty much everything there is to know. Alternatively you can do a consultation with him. I can be contacted by email on [email protected]

Hi, we are all based in the UK (although I do actually have an Aussie passport). I've had a look in the Hempcrete book and found these... hempcrete.com.au/ hempco.net.au/ I will also ask Graham who he knows in Australia, I know he mentioned someone in the interview. What part of Australia are you in?

Hi, I just found this company as well, based in WA hemphomesaustralia.net.au/

Nice. Have you seen our video on the barn we did recently?

Thanks and yeah he certainly knows his stuff! We are hoping to do some more interviews with him in the future where we will go even deeper on some of the more technical stuff.

It's not structural, so high rise would be difficult. There is one recently completed, which was 12 floors and reinforced with concrete blocks in Cape Town. It would be good to use as insulation on pretty much any building as well.

Hi, thanks for following along. The episodes on Matts have slowed a little but will be picking them up again soon, he's been busy completing the bedroom and doing a bit of gardening and snagging. Paint was used for both look and added protection for the lime render. He may try a bit of adding powder into the mix for inside, but as the house is in quite an exposed location it was best to go with a little more protection from the elements on the outside. He's also used some lime wash inside which looks really good, so you'll be seeing a bit of that in future episodes 🍻

@@thelowcarbonproject Got it! Makes sense. Thanks for the response. Looking forward to the following episodes. All the best.

Hi, that's not really viable to ship a unit all the way there, it would put a machine out of action for too long. It would probably be cheaper for you to travel to UK and learn here on the job. Best bet, is to get in touch with Graham Durrant and have a chat with him if you have some questions you'd like to ask him. [email protected]

These machines were actually modified render machines originally. They're made in france specifically for hempcrete now. It is possible (and has been done) to operate this with one man but would be slow going. Hemp domes are complicated because of waterproofing issues, the lime render isn't good enough at protecting it, on the non vertical sides and could damage the hempcrete in places without it being obvious. They haven't been tested long enough to prove they work yet.

Hi, this system came from France and is about 37k Euros. It's one of the best available at the moment, and there are cheaper versions but they operate a bit differently.

😊 Thanks

Nice. Check out our other videos if you've not seen them yet. We go into hand placing in more detail on Episode 6 of "The hemp house" playlist. Are you going to do it yourself?

@@Icarus-yc9em 🥰 Thanks very much. That's nice to hear 🍻

Thanks, yeah we know he forgot just before finally covering it but what you can't tell in the video is that the cardboard was actually there for a month exposed to the good old British weather. He gave it a good soaking when it was covered too. This was really just a rush job so he could get some stuff planted in time for the season. The next lot of beds will be deeper, layered up better and left covered over the winter. As it is though, the plants he has are doing really well 😊 Thanks for watching 🍻

Yes, using these boards does add drying time, but for us it wasn't really an issue... they still aren't plastered yet, so the walls have had over a year of good drying

Yes, using these boards does add drying time, but for us it wasn't really an issue... they still aren't plastered yet, so the walls have had over a year of good drying

@@thelowcarbonproject True, but in the case of clay panels the opposite could happen, which is not good given how much water the clay absorbs and could cause it to stratify badly. Your solution is also better from a structural point of view. And afterwards you could plaster it in clay. Congratulations great work

@antosmer 😊 Thanks very much. And yes drying too fast can be a bad thing, an added bonus of the permanent shuttering is less waste and less tamping, which also means less hempcrete used and can then be utilised elsewhere. We did an internal feature wall with the extra hemp and lime we had left over

@@antosmer I'm looking into a similar solution with the woodwool boards for internal shuttering of a hempcrete wall. Sure they must add drying time, but no sure how much, this material is very hygroscopic adsorb a lot of water, up to 90% of its mass. Plus they are very vapor open meaning they will permit drying along the vapor gradient as long as atmospheric conditions are favourable. Would be interesting to do a test to compare clay to wood in this use. My architect added an extra dimension to the debate by saying these would add extra resistance to compression and tension loads making the timber frame better able to handle high winds and earthquakes.

Thanks and good luck with your project 🍻

Hi Jamie, just regular 12mm plasterboard. Bit of a cost saving. ceiling doesn't really need to be breathable and Matt would have had to use lime on woodwool board and he didn't fancy that over his head. More chance of getting burns on skin. All the rooms have external walls, so still plenty breathable

Ha yeah, at least the water is level and the birds don't seem to mind. Just adding a bit more character to the place

🤩 Cheers 🍻

G'day to you too. Nice to hear from our international viewers 😁 🍻

Cheers for watching 🍻😎

Hi we hired the boards so not sure what brand they were but they are designed for concrete formwork. These that I found online look very similar (may be the same) www.geoplastglobal.com/en/products/formworks/geopanel/

@@thelowcarbonproject Hey man thanks so much. Can I ask what kind of binder you all used? We are building a 1600sq/ft structure in the USA and I've been taking notes on your videos

@@OneShot_WOLF Hi, we used a premixed bag which we purchased from a company here in the UK. This is the one we used but they have all different types depending on how its being applied. This is designed for hand casting. Good luck with your project. www.celticsustainables.co.uk/lime-green-hempcrete-binder-for-hand-casting/?gad_source=1&gclid=CjwKCAjw4_K0BhBsEiwAfVVZ_zBD6pML9BZb5uRhYkk82eR2Qo4Wr4Jz2EYU8L8g5JnrRQBokTn4RRoCCXUQAvD_BwE

😊 Yeah it has a really nice feel on the inside too.

Hi, yes, we replied to your comment on episode 5 and even provided a link to a site in the US. "Hi yes, we used a permanent shuttering. If you search for "wood wool board" you should be able to find something in the US. I think this brand was Celenit. I'm having issues with Internet here at the moment but managed to find this www.knaufinsulation.com/what-we-do/our-solutions/heraklith-wood-wool-solutions Have you seen episode 4 on our channel? That covers the install of it. Looking back, we probably wouldn't bother with permanent shuttering again. It was intended to speed up the internal work but wasn't actually needed. Hope that helps. Thanks for watching 🍻"

@@thelowcarbonproject Curious: "wasn't actually needed." what was the issue? I am testing a board made of hempcrete - long hurd, fiber mixed in. Would that make a difference to you. I would prefer that over a wood fiber product. Thanks.

@dwilliamsnetosnet Our thinking was that we could plaster inside before the wall had fully dried, but timeline changed, Matt needed to move in earlier so he went straight onto getting the heat pump, bedroom and bathroom in. He's still not started on downstairs yet, so the walls have fully dried out, they've had over a year so far and he would be able to plaster straight onto the hempcrete.

😊 Glad you enjoyed it, thanks for watching 🍻

Hi yes, we used a permanent shuttering. If you search for "wood wool board" you should be able to find something in the US. I think this brand was Celenit. I'm having issues with Internet here at the moment but managed to find this www.knaufinsulation.com/what-we-do/our-solutions/heraklith-wood-wool-solutions Have you seen episode 4 on our channel? That covers the install of it. Looking back, we probably wouldn't bother with permanent shuttering again. It was intended to speed up the internal work but wasn't actually needed. Hope that helps. Thanks for watching 🍻

@tabiripetrovich517 Ha yeah sorry we have been a bit slack with other language subtitles, we will get on it. What's you native language?

Not in this mix. But yeah I have also seen others do that. Probably cheaper than lime and easier to get in some parts. The lime we used is manufactured for hand placing hemp.

Not heard of timbercrete before, will look into it. Would be good to know if anyone has or is using that in UK

Hi, yeah hemp is not structural. The entire wooden frame of the house is where the strength is. The roof trusses are sitting on the frame, not the hemp.

Yeah it was pretty quick considering there was only 2 of us. By moulds, do you mean the black boards? they are shuttering that is usually used for concrete forming. We used them on the outside and have a breathable "permanent shuttering" on the inside. We hired the temporary ones from Graham at www.hemplimespray.co.uk

🤣 Awesome, yes we have 420 here too 🍻

I'm not Matt, but he's a qualified plumber and has been a general builder his working life

@@thelowcarbonproject How many years has he been doing this job? I mean, at what age did he start?

@zFernweh Since he left school, it was about 15 years. He started working for his dad and then took over the business when he retired.

Hi yes, just a thin layer soft sand to get a good level, before putting in the steal work

Hi, it's called Celenit wood wool board, we got ours from here www.lime.org.uk/products/boards-backgrounds-insulation/wood-wool-boards.html

@@thelowcarbonproject what is the brand name for the temporary shutters?

@@davefrofisher The brand we used was CEWOOD but there are others available. Search for wood wool board and that should show what's available in your country. We got these from here - www.lime.org.uk/products/boards-backgrounds-insulation/wood-wool-boards.html Knauf do them aswell - www.knaufinsulation.com/what-we-do/our-solutions/heraklith-wood-wool-solutions

@@thelowcarbonproject cheers for getting back to me, actually meant the interlocking formwork brand name? But thanks for the links to the wood wool boards too. Would you do it the same way with the wood wool boards if you did it again?

@@davefrofisher Ahh sorry, we hired the panels from another hempcrete guy, not sure what brand they were but these that i've found look very similar. www.geoplastglobal.com/en/products/formworks/geopanel/ We probably wouldn't bother with the permanent shuttering again but there are benefits to doing it. There is less tamping so over a whole building, uses less hemp and is maybe a tiny bit more insulative. Also less shuttering to move when pouring. But there is also additional cost to using the boards and the hempcrete probably takes a bit longer to dry. The permanent boards would be useful if we were wanting to plaster and finish indoors before the hempcrete has dried properly.

Haha yeah fingers crossed! He did actually put pressure above mains and no signs of leaks... Yet :-|

Yeah quite a few been built here, there was a Kevin McCloud show called the street and someone built one, he also built a place called the Triangle which had multiple houses. We haven't got a final cost yet but will be going into that, once Matts worked it out fully. A rough estimate for Hemp, lime and timber for the frame was about £10K. It's a self build so not included labour in that cost yet. Stay tuned for a proper cost break down episode. Cheers 🍻

Hi and thanks. No need for vapour barrier, the hempcrete deals with all that itself. The walls "breath" and can take in and expel any moisture on their own. They balance the humdity inside the house keeping it at a nice healthy level for humans. The walls are about 370mm thick, with timber frame to the inside which helps aswell. Looking in the hempcrete book it seems that cavities are where condensation can be an issue and this is a monolithic wall without any cavities. Good question, we'll add this into our next Q+A episode and Matt can try going into it a bit more, he learnt quite a bit about that when we were insulating the loft / attic and will also be doing a full episode on insulation in the future. Cheers 🍻

Thanks very much and thank you for watching 🍻

🤗 Thanks

😊 Thank you