This section lists the approved Material Standards documents that explain the required material properties for each permitted insulation type.

a) ASTM C 726, "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."

NOTE: Some of these standards list their own requirements for flame-spread ratings, whereas the code does not.

Also, insulation that is in contact with the ground, needs to be strong enough to support the weight of the soil, must be resistant to moisture, and must restrict heat flow even when wet.