Catalan Brick Vault

What a wonderful skill  … beautiful work with a basic element and basic tools. I can imagine something like this being built over eathbag walls (though I don’t know about using it for an underground roof that may carry alot of weight … will it hold?)

(Very) Passive (Not) Solar

The only place we’ve seen sunshine for the past … oh … I don’t know … at least a week, maybe two … was on a video call with Annelieke in Portugal. And this is what the 10 day forecast looks like:

This is that time of the year where the sun can be absent for weeks and the temperatures drop … and the theory of passive solar design simply cannot deliver. We simply cannot rely [for warmth during our winter months] on a daily cycle of solar charging and discharging.

That shortcoming hit me during the first winter at Bhudeva … and that is why I got excited when I discovered Passive Annual Heat Storage which is about creating a YEARLY cycle of charging abundant summer warmth and discharging it during winter.

Earthbag Cellar – Walls Done!

After winding down from the full-house weekend … we got back to our “regular schedule”. Marta stayed with us a while longer and helped us get almost to the finish line.

We were excited to finally get to level 21. Here we are passing over the front arch for the first time:

When we finished that wall segment we finally got to pull out the forms … and … it was exhilarating to unveil the self-supporting arches … so simple, powerful (the more we weight we put on it – and we will be putting on quite a bit – the stronger it gets!)and beautiful (I’m really glad we decided to give arches a try!):

Yesterday we finished, with Marta’s, help going all the way around the structure and were left with only with two small segments of the outside wings.

Today Iulia and I went out and completed those two small segments – counting down the last of 6 sacks … and suddenly the the last can is tossed up, the last sack is placed down … the last tamping … earthbag walls were complete!

Fascinating journey from a crater to a structure… made of the same earth we dug out!

We are now waiting to see if we can get the acacia logs we want to make into a roof (our preferred option). If we do, they will be freshly cut and will need some time to cure … meaning that we won’t be able to place them on the structure before winter. If we don’t get the logs we will rever to plan B: regular 2×8 to build a flat roof. That may still happen in the coming weeks.

Depending on the weather we may be able to get some more primary rendering work done … but that is optional … maybe continue with the electrical wiring …  I am relieved and satisfied we got this part done … much to share … too tired to do so now.

 

 

Earthbag Cellar at Level 20

Iulia was a way for a few days and I took the opportunity to do some initial finishing tests.

Then Iulia came back and brought with her a wave of people. We’ve just been through a full weekend here at Bhudeva. Christina and Marta came out to help in the final levels and they were joined for one day by Luci and Stefan. We’ve completed 19 and are two-thirds into 20.

It was moving to see 5 people on and around the walls working in two teams … until this weekend I could only imagine what this might look like.

AND the day felt way more productive then the already productive work we did get done … because soon after as we started level 20 … Iulia and Chritina got to work on this sack:

… and when they laid it down and, after tamping, it met the top of the arch, it became clear to us that 21 would be the last level … and the idea of level 22 disintegrated and we were suddenly another level closer to finishing the walls:

If all goes well we should be finished in a few days. Our fingers are still crossed that the acacia logs for the roof will be cut down soon and that we can get them to Bhudeva and get them on before winter.

Earthbag Cellar at Level 19

The day before yesterday we finished level 18. Yesterday we started level 19 by putting in the ventillation pipes (for air flowing out of the two rooms). We cobbed them in place and then continued to work aroud them.

Today we focused on the arch above the entry door … and we started by adding two more arch pieces on each side until we were ready for the last 3 sacks that cap the arch.

… and cap it we did

I am soooo looking forward to taking out the forms … but holding off until we add the final layer on top of the arches 🙂

I thought we would be able to finish with 21 levels … but now that the first arch is complete and the highest point is set it looks like we will need to go up to 22.

Iulia is going away for a few days … after which we hope we will be able to finish before deep frosts settle upon us (temperatures are dropping rapidly).

If all goes well (we will in the coming days) we wil have acacia (strong and rot resistant) logs to cover the entire roof … keeping our fingers crossed that we will be able to close the cellar before winter!

 

Earthbag Cellar Second Backfilling

Originally we intended to backfill only once, about half way through and then at the end when we bury the structure. But, the structure is going to be a bit higher then expected and working higher up becomes trickier, especially for two people … so … after finishing level 16 we decided to backfill again.

Work started yesterday when we pulled up the plastic cover and scanned it for tears and wholes. Most of it was in good shape (it got buried in some soil which protected it from the sun). We replaces one section that was torn and brittle.

Florin arrived at 10am and started by clearing a path (we cleared most of it by peeling away soil as we filled the tubes):

He brought soil into the tight corner with the front loader then used the spoon to move / push it into a place:

Then he came around the top of the site and started filling behind the structure

And with a bit of manual labor we the first corner was full

And moving gradually along the wall … until is was all full

… bringing us to the other side which had better access so that the front loader could be used to bring soil in

then we went back around to the first corner (which we left slightly exposed in case we needed to bring in more soil) … and buried it:

… it was done in 3 hours … and now again we get to work at “ground level” … this time all the way to the top:

It is amazing to see how quickly wild grasses and weeds went to work healing the soil around the site … and now, after the excavator, how bare everything looks again … we are already looking forward to bringing in plants to heal the site and help nature take over once again.

Earthbag Cellar Level 14, 15 …and Arches

We tend give much attention to the growing walls, but we would like to acknowledge the unsung heroes of this project … the cans we toss up the walls to move soil from wheelbarrows into the sacks and tubes. We recently retired the first pair of cans … and here you can see side be side a new can next to a can that has moved ~25 cubic meters of soil (one can at a time!).

My sister, Orit came to visit for a few days and joined us for a few sessions … we now regularly sit on the walls to take in the sunset (horizon rising):

Istvan also visited with us briefly, showed us saturn in his telescope and joined us for a work session:

Liviu and Ana also visited with us and Liviu also joined us for a morning session (we forgot to take a picture … so you’ll have to take my word for it) … and we have finished levels 14 and 15, we are now working on 16 and the arches have started to form:

The arches have started to draw a finish line … the walls will be finished when the arches are complete and one additional level has been layed on top. Right now, my estimate is that 21 levels should get us there … but that will become more clear as we start to move up through the next layers.

We are currently inquiring about two options for a roof … more on that in an upcoming post.