Insulating Fire Bricks

[spinal]

I need a few insulating fire bricks as I've realised I didn't consider a heat break at the entrace!

Doh!

I only need a handfull (a dozen tops) - anyone have some spares I can buy? (or know where I can buy a few)

M.

[faz]

You could always use ceramic rope between the dome and arch and a vermicrete break in the floor - this will work if you cover it with tile or brick slips.