(1) Except as required in Sentence (2), thermal insulation shall conform to the requirements of,
(a) ASTM C726, “Mineral Wool Roof Insulation Board,”
(b) CAN/CGSB-51.25-M, “Thermal Insulation, Phenolic, Faced”,
(c) CGSB 51-GP-27M, “Thermal Insulation, Polystyrene, Loose Fill”,
(d) CAN/ULC-S701.1, “Thermal Insulation, Polystyrene Boards”,
(e) CAN/ULC-S702 “Mineral Fibre Thermal Insulation for Buildings”,
(f) CAN/ULC-S703, “Cellulose Fibre Insulation for Buildings”,
(g) CAN/ULC-S704, “Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced”,
(h) CAN/ULC-S705.1, “Thermal Insulation - Spray Applied Rigid Polyurethane Foam, Medium Density - Material - Specification”, or
(i ) CAN/ULC-S706.1, “Wood Fibre Insulating Boards for Buildings”.
(2) The flame-spread rating requirements contained in the standards listed in Sentence (1) shall not apply.
(3) Insulation in contact with the ground shall be inert to the action of soil and water and be such that its insulative properties are not significantly reduced by moisture.
(4) Type 1 expanded polystyrene insulation as described in CAN/ULC-S701, “Thermal Insulation, Polystyrene, Boards and Pipe Covering”, shall not be used as roof insulation applied above the roofing membrane.