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Proposed building enclosure

April 21st, 2007

For our initial meetings with contractors Joanne & Alex had put together a list of materials we will likely use in the home’s construction. Here they are:

Below Grade Enclosure

  • Foundation Wall Assembly
    • Clean, Free-draining backfill
    • 2″ Roxul DrainBoard Foundation Insulation
    • Damp-proofing on cement parging
    • 10″ Durisol ICF
    • 3/4″ strapping
    • 1/2″ DensArmor Plus
  • Basement Floor Slab Assembly
    • 4″ Compacted Gravel Base
    • 2″ EPS Insulation
    • 6mil Polyethylene Sheet
    • 4″ Concrete Floor Slab

Above Grade Enclosure

  • Wall Assembley (R40)
    • Fibre Cement Board Cladding
    • 3/8″ Strapping
    • 4″ Polyisocyanurate Insulation
    • 1/2″ ZIP OSB Sheathing
    • 2×6 SPF Framing at 600mm o.c.
    • Cellulose Cavity Insulation
    • 1/2″ Gypsum Board
  • Roof Assembly (R60)
  • Windows and Doors
    • Fiberglass framed, double-glazed, low-e (SHGC < 0.5, VT > 0.5, overall U-value < 2.0 w/m/K), argon filled, superspacer windows
    • Insulated metal-clad wood entry doors

Mechanical / Electrical

  • Space Heating and Domestic Water Heating
    • Source: High-efficiency condensing boiler (high temperature DHW and low temperature space heat) with integral or external heat exchanger.
    • Distribution: Hydronic Radiant Floor Slabs (all floors)
    • Rough-in for future solar pre-heat and power.
  • Ventilation
    • Direct outdoor air system (DOAS) – dedicated ducted supply with Heat Reclaim Ventilation (HRV). Supply points in all bedrooms and living rooms, exhaust from kitchen and bathrooms.

I think the ZIP OSB sheathing is one of the more interesting products to be used in this project. It differs from regular sheathing in that, once installed, creates a perfect water barrier for your home, before siding is even attached. As a result once the sheathing is on, work can actually proceed on the interiors while work continues to complete the exterior shell.


Posted by Colin