Kamado Joe GasJoe GJ26 Owner's Manual page 11

Clearances from Non-Combustible Construction
A minimum of 6" clearance from the back of the grill to non-combustible
construction is required for the purpose of allowing the lid to open fully (Figure
04). It is desirable to allow at least 6" rear and side clearance to noncombustible
construction above the cooking surface for counter space. If you'll be using the
rotisserie option, this space is essential for motor and skewer clearance. The
grill can be placed directly adjacent to noncombustible construction below the
cooking surface (Figure 03 and Figure 04).
Figure 3
Figure 4
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