Strength of an Arch

• We build a super-strong arch from 4-1/2" thick special arched-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 result is that these kilns will last years longer than kilns that utilize flat roofs.

Insulation Quality

• In addition to the 4-1/2" of K25 firebricks, an additional 2" of non-RCF fiber blanket insulation is used on top of the arch.
• This makes for a well-insulated top where much of the heat loss occurs.