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conform to CAN/CSA-B365. 

 

 

 

 

Member:  Using a minimum thickness 3.5” (89 mm) brick and a 

5/8” (15.9 mm) minimum wall thickness clay liner, construct a wall 

pass-through.  The clay liner must conform to ASTM C315 (Stan-

dard Specification for Clay Fire Linings) or its equivalent. Keep a 

minimum of 12” (304.8 mm) of brick masonry between the clay 

liner and wall combustibles.  The clay liner shall run from the brick 

masonry outer surface to the inner surface of the chimney flue 

liner but not past the inner surface.  Firmly grout or cement the 

clay liner in place to the chimney flue liner.   

 

ber: Using a 6” (152.4 mm) inside diameter, listed, factory-built 

Solid-Pak chimney section with insulation of 1” (25.4 mm) or more, 

build a wall pass-through with a minimum 9” (228.6 mm) air space 

between the outer wall of the chimney length and wall combusti-

bles.  Use sheet metal supports fastened securely to wall surfaces 

on all sides, to maintain the 9” (228.6 mm) air space.  When fas-

tening supports to chimney length, do not penetrate the chimney 

liner (the inside wall of the Solid-Pak chimney).  The inner end of 

the Solid-Pak chimney section shall be flush with the inside of the 

masonry chimney flue, and sealed with a non-water soluble refrac-

tory cement.  Use this cement to also seal to the brick masonry 

penetration. 

 

Member: Starting with a minimum 24 gage (.024” [.61 mm]) 6” 

(152.4 mm) metal chimney connector, and a minimum 24 gage 

ventilated wall thimble which has two air channels of 1” (25.4 mm) 

each, construct a wall pass-through. There shall be a minimum 6” 

(152.4) mm separation area containing fiberglass insulation, from 

the outer surface of the wall thimble to wall combustibles.  Support 

the wall thimble, and cover its opening with a 24-gage minimum 

sheet metal support. Maintain the 6” (152.4 mm) space.  There 

should also be a support sized to fit and hold the metal chimney 

connector. See that the supports are fastened securely to wall 

surfaces on all sides.  Make sure fasteners used to secure the 

metal chimney connector do not penetrate chimney flue liner.   

 

Method D.  2” (50.8 mm) Clearance to Combustible Wall Mem-
ber: Start with a solid-pak listed factory built chimney section at 
least 12” (304 mm) long, with insulation of 1” (25.4 mm) or more, 
and an inside diameter of 8” (2 inches [51 mm] larger than the 6” 
[152.4 mm] chimney connector). Use this as a pass-through for a 
minimum 24-gage single wall steel chimney connector. Keep 
solid-pak section concentric with and spaced 1” (25.4 mm) off the 
chimney connector by way of sheet metal support plates at both 
ends of chimney section.  Cover opening with and support chim-
ney section on both sides with 24 gage minimum sheet metal sup-
ports. See that the supports are fastened securely to wall surfaces 
on all sides. Make sure fasteners used to secure chimney section 
do not penetrate chimney flue liner.