I am building a cob bread/pizza oven in Mozambique where we live - photos on UK wood fired ovens forum: http://ukwoodfiredovenforum.proboards.com/index.cgi?board=ceovens&action=display&thread=1498
As we never get very hot in the UK, I thought I'd ask some advice on this forum about this question:
- In the hot sun here (30's C / 90's F in the shade) is it better to dry out my thermal layer before adding the insulation layer or is it better to add the insulation layer straight away to protect the thermal layer from the sun and slow down the drying? The first test brick I made was pretty hard within a few hours, though it was only 1" thick.
Today I will make some test bricks with different clay/sand ratios. It was hard enough for me to get any kind of clay so I don't really want to trying to hunt around for a different type/mix.
Any input appreciated.