Mortar for Chimney Liners

(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 one part Portland cement to three 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 one part Portland cement to three parts sand by volume.

Article 9.21.3.9. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.