Chimney Lining Materials (1)  Every masonry or concrete chimney shall have a lining of clay, concrete, firebrick or metal. Article 9.21.3.1 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Chimney or Flue Pipe Walls     (1)  The walls of any chimney or flue pipe shall be constructed to be smoke- and flame-tight. Article 9.21.1.4 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Clay Liners (1)  Clay liners shall conform to CAN/CSA-A324-M, “Clay Flue Liners”. (2)  Liners referred to in Sentence (1) shall be not less than 15.9 mm thick and shall be capable of resisting, without softening or cracking, a temperature of 1100°C. Article 9.21.3.3. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Clearance from Combustible Materials (1)  The clearance between masonry or concrete chimneys and combustible framing material shall be not less than,     (a)   50 mm for interior chimneys, and     (b)   12 mm for exterior chimneys. (2)  A clearance of not less than 150 mm shall be provided between a cleanout opening and combustible material. (3)  Combustible flooring, […]

Clearance to the Fireplace Opening (1)  Combustible material shall not be placed on or near the face of a fireplace within 150 mm of the fireplace opening, except that where the combustible material projects more than 38 mm out from the face of the fireplace above the opening, such material shall be at least 300 mm […]