Building an earth oven at Saffron Acres (part 2)

Want to continue building an earth oven with the lovely people at Saffron Acres? (next session Saturday 14th June – are you available?)

IMG_0261

LESSBIG is ‘on site’ and needs your help!

Previously, on LESSBIG…

16042014273

What on earth is this supposed to be? (pun very much intended)

(See Part 1 here)

On a really nice Saturday, seven of us got started at about 11am.

Digging and mixing

IMG_0231

Plenty of digging to do.

IMG_0234

Loading up the wheelbarrows

IMG_0235

First we mixed and trod in the wheelbarrows…

IMG_0236

…but a plastic sheet on the ground is probably better.

IMG_0237

Using various cut log sizes to help build up the base. (see – cordwood or stackwall construction)

Making a “demo dome”

At this stage, with maybe 2/3rds of the base complete we then focused on making a demo dome:

IMG_0238

Testing out the method for building a dome. This dome of sand was approximately half as high as it was wide.

IMG_0239

Wet newspaper layer to help when digging the sand back out.

IMG_0240

The first rough layer. We tried to use a finer mix of woodchip in this mix. Remember to try and press more down rather than in when building up.

IMG_0241

The second layer was more liquid and smooth which helps seal the gaps, obviously important for insulation but also looks a bit tidier.

IMG_0242

Cutting out the door with a small pointed trowel. Kiko Denzers book, I believe, suggests the door should be just over half/60% the height of the dome.

IMG_0243

Scoop out the sand.

IMG_0246

A bit of tinder

IMG_0249

Nothing like burning things at the end of a long day. (Note in the background we covered the other one over with plastic sheet)

IMG_0254

The little chimney hole with smoke, using a bit of log as a door. The earth is still wet of course, but you can just about understand the principle of absorbing lots of heat and radiating out afterwards. With this mini version, the walls might be too thin for it to really work. Also the concrete slab base won’t be as insulated as the real one. Still, I should give it a try when it’s properly dry.

The next week…

IMG_0259

I came back after a couple of days to carry on. The base is nearly at the height I was aiming for the entrance (see the beanpole to the side); so you don’t have to bend down so much when using the oven.

IMG_0260

There had been a day in between visits where it had rained, so I was pleased to see these test pieces (left uncovered) seemed to be okay. To be fair, it wasn’t much rain, the next time I visit I bet they will just be sad little heaps of mud. Fingers crossed anyway.

IMG_0261

So after about 4 hours by myself, I think I’ve gotten to the level where we will put a glass bottle layer in, then the base, then the dome itself. (nb- thanks to everyone for bringing down some empty bottles!)

For reference, I would say with these two stages combined, plus general faffing around and the foundation, it would take one person about 30 hours to get this far. So still probably feasible, over enough time for a single person to take on if you’re looking for a summer project for the garden. AnĀ  awful lot of that time is just digging and mixing; but then you are doing the manufacturing (ie making everything from scratch), as well as the construction (ie not using ready made bricks or blocks.).

Get in touch (rfletcher@dmu.ac.uk ) if you want to help out with the next stage on the 14th of June, when we will probably be able to finish it off and give it a test fire at least.

For those of you who don’t know where Saffron Acres is, it is fairly central, on Coppinger Road, just off Saffron Road. Near the Aylestone Leisure Centre. If you don’t fancy the oven, they’ve got tons of other stuff you could get involved in!

 

Advertisements

One thought on “Building an earth oven at Saffron Acres (part 2)

  1. Pingback: Building an earth oven at Saffron Acres (part 2) | TinderNews

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s