Heat Flow Control
All assemblies that separate the conditioned environment from the unconditioned environment, including attached garages, must be insulated. This includes roofs, walls, foundations, windows and doors.
The 2012 Interim Changes to the 2010 NBC regulate the “effective” insulation value for each assembly or component of the building envelope for six different Canadian climate zones. More than one type of insulation may be used to provide the effective insulation value. For example, batt insulation may be used between wall studs in combination with rigid insulation installed on the exterior.
The effective insulation value is the combined insulation value of the studs, sheathing, drywall and the insulation itself. Framing members, ducts and pipes reduce the space available for insulation materials and reduce the insulating value of the assemblies; therefore, the effective value is usually lower than the “nominal” value (the value of the insulation itself).
Different types of insulation are needed for different parts of the building. For example, only water-resistant insulation can be used on the exterior of the foundation below grade.
The mid-efficiency equipment used previously and are now required by the building code.
Plan plumbing and ductwork in conjunction with floor framing to avoid conflicts. Avoid penetrating the air barrier system with plumbing, electrical or other components. When fixtures such as dryer vents, water pipes or electrical conduit must penetrate the air barrier system, take special care to seal around the penetrations.
Source : Canada Mortgage and Housing Corporation (CMHC)