Materials used for this kiln
Outside: recycled Rylance firebricks from the old kiln.
Inside: Claypave refractories.
Centre wall between chambers: standard firebrick with high alumina firebricks lining in the throat and fire box, and especially around the base of the bagwalls.
Bagwalls are made of 9 inch square high alumina firebrick tiles.
Chambers up to the arches are lined with K26 hot face insulation bricks, except for the area in the throat a couple of courses above the fire arch.  
Top arches are lined with K28s.  These insulation bricks came from Steve Harrison and are of American manufacture.  Geoff looked at both the Chinese and Malaysian types but eventually decided to go with the American ones (which were about 10% dearer) because of his reservations about the long term durability of the others. The insulation bricks have a very fine wash of alumina and kaolin painted over them to assist in resisting any attack by fly ash.

The images below are links to enlargments