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Old coal mine estate needs volunteers

World, Europe, Spain, Selva


Travel dates

About the workproject

We need 2 volunteers

We own a former coal mine estate on the Spanish island Mallorca. It's a 3 hectare sized domain with a vineyard, an orange garden, 4 houses, a large workshop etc.
We own a lot of machines to assist us with the work, but there is always more help needed. If you have specific skills of interests like: electrician, mechanic, building / construction, knowledge about growing plants and trees or any other skill you could help us out here in return for accommodation in one of our houses and we give you a weekly fee so you can buy your own food.
Take a look at our blog which we write on regularly. We take on all kinds of projects, small or large, easy and complex. All volunteers who came here have had a super great time !

About the host

Mark & Ans (57)

Host since



Spanish, Nederlands, Swedish

Last seen online


We are Mark & Ans and we are the proud owners of a large finca on Mallora, a former coal mine closed in 1987. We bought this paradise in 2012, could not believe that we would own a real 'estate' and started to make improvements and worked on numerous exiting projects. Now - after 7 years - we have established a vineyard, an orange grove, created a 'jungle', a veggie garden and many many more. See our project blog which we update regularly, but only when we have something interesting to write. Join this blog and be updated (max 1 update per week, no spam, no advertising and we are only writing something if we believe it's adding something interesting for our followers).
Contact us if you want to come and help us here.

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My project blog

The final chapter of the arch building has started

October 11, 2019

I have already created several posts about arch construction of concrete.Flashback for new readers For those who are new to my blog: the former coal storage building consists of 3 rooms where the coal could be loaded into trucks. So 3 trucks could be loaded at the same time. The ceiling of these rooms are arch shaped as to be strong enough to hold the enormous weight of the coal above, stored in 9 compartments/bunkers. Two of the 3 arches are structual quite ok and only had to be extended 2 meter to the wall at the back of these rooms, which has already been done. The third one however was very bad and had cracks all along the length of the arch, one in the middle and two on the lower sides. Re-construction of arch of 12 x 4 meterAfter having removed part of this third arch using the special non exploding dynamite I was positively surprised. The concrete was not too bad, very dense and it looked solid. Maybe it was not necessary to reconstruct the whole arch but only the really bad parts. I called in an expert and he was clear: remove and remake the whole arch. In principle I could do the whole arch of 12 meter in 1 time, but that would require 6 more polystyrene molds - in the shape of the arch. These are expensive. I would also need 100 more stamps to hold these molds up in the air. And I would need a lot more concrete. I decided to make it in 3 parts of 4 meter each, which required just 1 more polystyrene mold and I already have 50 stamps in stock.Thanks Wim !Wim - brother of Ans - assisted me with most part of the construction of the forms and all the preparation. Thanks Wim, you were a great help and it was a pleasure working together !D-DayToday was the big day. After a week of preparation, creating the forms, putting the molds up with the 50 stamps, covering it with plastic, then covering it with planks impregnated with diesel as concrete does not like to stick to diesel, adding lots of rebar as stacks as grids, it was ready to start making concrete. I calculated that the layer of around 20 cm concrete would equal about 3 m3 of concrete which means 10 mixers of 300 liter each, 30 bags of cement, some fibers to increase strength and a liquid which makes it kind of water resistant. 11 Loads in 3 hours / 7000 kg This morning we started around 11 AM with mixing the first load. We is: Ans, Martin - a new volunteer from Estonia - and myself. Around 2 PM we were ready, everything went smooth and according to plan, no holes in the forms where the concrete could get out and the forms were holding the 7000 kg of concrete nicely in place. 28 Days to reach final strengthNow the concrete needs time to cure, which needs 28 days to attain maximum strength (after 5 days around 50%). I intend to remove the forms in the beginning of November. I am breeding on an idea to not having to remove the forms with the polystyrene on top, but only most of the stamps and then put it on wheels and roll it to the next section. This would save a lot of time. To be continuedThe arch project posting will be continued upon finalizing the complete arch which will be likely to be reached by the end of the year.

Project dates

Open for offers, contact us

Work to be done

  • animal care
  • art projects
  • boat handlers

Expected workhours

  • 5 hours a day
  • 5 days a week

Work exchange deal

  • private cottage, private room, shared apartment

  • self catering

We will give you money to buy your own food.

  • no money is involved

In special cases we could compensate you for additional hours.

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