74.Except for doors, windows, skylights and other closures, the thermal resistance of each building component, not taking into account framing or furring, situated in a municipality in one of the zones mentioned in Schedule 2 shall comply with the values prescribed in the table below for that zone.
A building situated elsewhere than in a municipality listed in Schedule 2 is included in the same zone as the nearest municipality mentioned. If there is more than one municipality situated equidistant from the municipality where the building is located, it is included in the zone of the municipality with the most stringent requirements.
This section does not apply to those parts of building enclosures made with materials designed to collect and store solar energy, on the condition that their use does not increase the building energy requirements during winter compared with building components built in conformity with the requirements of this section.
Minimum thermal Assembly (Rt), m2 • °C/W Building assembly Zones
A B C D E F Wall assemblies above ground level (other than foundation walls) separating heated space from unheated space or the outside air:
(1) for a wall of any type other than that specified in (2): 2.8 3.0 3.2 3.5 3.8 4.1
(2) for a concrete or masonry wall insulated with rigid material on the outside only: 2.4 2.6 2.8 3.0 3.2 3.5 Foundation wall assemblies separating heated space from unheated space, outside air or adjacent earth: 2.2 2.2 2.2 2.2 2.2 2.2 Roof, ceiling or floor assemblies separating heated space from unheated space or the exterior:
(1) for any assembly other than those specified in (2):
(2) for a floor, roof or ceiling assembly of massive wood panelling at least 38 mm thick, or of steel or concrete slabs, and insulated with rigid material only: 2.4 2.6 2.8 3.0 3.2 3.5 Perimeter of slab-on-ground floors less than 600 mm below adjacent ground level:
(1) where heating ducts, pipes or resistance wiring are embedded in or beneath the slabs: 1.2 1.3 1.5 1.7 1.9 2.1
(2) slab-on-ground floors other than those described in (1): 0.8 0.8 1.0 1.3 1.5 1.7