Translations:Poelito - Poêle de masse semi-démontable/199/en-gb

You will need to make the moulds so that you can pour the refractory concrete. This is effectively making the conduits where heat and gases circulate. For this, you will need to make moulds for the different conduits using cardboard which then need be taken out after the concrete has been cast. They need to be made solid enough to withstand the pressure of the concrete but equally be easy as possible to take out once it has all dried.