24/10/18 – Message sent to http://mmu34.eklablog.com via their contact form.
I am planning a GREB house and considering how do to the foundations. I am interested in the method you chose and also the products you used. What is the make of the polystyrene blocks? I have tried to find them using the internet but no luck. Do you find the floor is well insulated?
Slope pitch conversion, % pitch to degrees pitch can be found here.
I’m calculating a suitable roof pitch (truss roof) to allow at least 30cm of insulation to exist at the inside of the bale wall (interior) to minimise heat loss on this area of the house. The solution can be a raised heal but alternatively the slope of the roof can be formed so that insulation can be maximised.
Maugard Bois recommended I get in touch with https://www.scop-btp.eu/constructeurs-bois/ . Specifically Joerg Ellerwald, co- manager. This was after I was discussing joist and beam span tables for France. (contact at scop_ptp.eu)
Someone in a self-build group suggested a boiler stove instead of just a burner requiring separate water heating. The oone they linked to had a heat output of 2kW with 8kW going to the water. That seems low given we’ve been told we need a 10kW stove for m2.
Cost wise they’re not much difference though. Something to consider?
This one, the Stratford EBW12, has a total output for 24kW, of which 6kW goes into the room and 11.8kW into the water.
It has a direct air supply (required by RT2012).
Trying to find out why you’d choose a water heating stove and the Centre for Alternative Technology have an article suggesting that it’s not worth it unless you have a super-duper stove such as the Broseley eVolution 26 boiler. With this you get 10kW for heating and 15.8kW for hot water heating. I can’t find a price for it though!