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Arched Roof for L&L Front-Loading Kilns
We build a super-strong arch from 4-1/2" thick special shaped K25 firebricks (which are stronger than the standard K23 bricks). This is the time-proven way to design a front-loading kiln. You can't prevent a roof in a kiln from cracking but an arched roof will prevent a roof from collapsing. The end result is that these kilns will last years longer than kilns that utilize flat roofs.
In addition to the 4-1/2" of K25 firebricks an additional 2" of non RCF fiber blanket insualtion is used on top of the arch. This makes for an extremely well-insulated top where much of the heat loss is.