Literature Review on Building Envelope, Heating and ... - Beeshive.org

• Plumbing system: To solve condensation problems, plumbing is insulated and,
depending on the building’s heating system, a glycol or warm air is used to heat
pipes.
• Porch: Houses include an unheated, insulated porch at the main entrance to act as an
air lock to keep cold air out when the door is opened, and also to minimize
condensation.
Angers (1999) noted that a new approach is being tried in which building modules are
prefabricated in a factory in southern Quebec and transported on barges to the north. The
goal is to reduce completion costs on site.
Nunavut Example: A building envelope assembly adopted by Nunavut Housing
Corporation (2005) consists of the following. A similar assembly is described in the
builders’ manual prepared by the ACHP (1995).
• Exterior wall assembly:
- total RSI-5.1 (R-29), from exterior to interior;
- prefinished structural panel siding i ;
- air barrier; a complete house rap system;
- wood studs, 38 x 140 mm (2 x 6) at 600 mm (24 in.) on centre;
- mineral wool batt, 140 mm (5½ in.), RSI-3.9 (R-22);
- poly vapour barrier, 6 mil ii ;
- strapping 38 x 38 mm (2 x 2) at 600 mm (24 in.) on centre;
- semi-rigid insulation, 38 mm (1½ in.) RSI-1.2 (R-7); and
- gypsum board, 12.7 mm (½ in.), abuse resistant, painted.
• Roof assembly: Total RSI-7.7 (R-44), from exterior to interior;
- metal roof;
- strapping 19 x 64 mm (1 x 3) at 600 mm (24 in.) on centre;
- air barrier;
- plywood sheathing, 9.5 mm (3/8 in.);
- joists;
- mineral wool batt two layers, 150 mm (6 in.) RSI-3.9 (R-22) (fills void completely);
- plywood sheathing, 12.7 mm (½ in), 3 mm (1/8 in.) gap at joints;
- vapour barrier; and
- gypsum board, 12.7 mm (½ in), abuse resistant, painted.
• Floor insulated assembly: Total RSI-9 (R-51), from interior to exterior:
- vinyl tile;
- underlay (6 mm (¼ in)) over 16 mm (5/8 in.) tongue and groove plywood (glue
and screw/nail to floor joists);
- floor joists;
- mineral wool insulation, two layers 150 mm (6 in.), RSI-3.9 (R-22) (fill void
completely);
- strapping 38 x 38 mm (2 x 2) perpendicular to the floor joists;
PERD-079: Task 2 - <strong>Literature</strong> <strong>Review</strong> 25