(1)
Chimney liners used in chimneys for solid fuel-burning appliances shall be laid in a full bed of
(a)
high temperature cement mortar conforming to CAN/CGSB-10.3, “Air Setting Refractory Mortar,” or
(b)
mortar consisting of 1 part Portland cement to 3 parts sand by volume.
(2)
Chimney liners used in chimneys for oil- or gas-burning appliances shall be laid in a full bed of mortar consisting of 1 part Portland cement to 3 parts sand by volume.