Originally posted by mleuck
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A Form build uses an internal support framework to support the bricks (or castable material) as you build. These forms can be made from wood or even expanded foam sheet; the trick is ensuring you can get them out after completing the dome !
The indispensable tool is a device anchored in the middle of the oven to ensure each brick is the same distance from the centre point, no forms are required as the IT swivels in use and is used to place each brick in turn.
Just to confuse matters even further, a pile of sand can be used as a form; and you can build a dome freehand (as I did, see link below), the choice is yours.
Happy building ... Paul
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