Building Envelope


In addition to providing security, energy-efficient doors prevent air and temperature leak from the house. Doors come in a variety of materials, some of which reduce heat flow better than others. Depending on the style and type of insulation, for example, metal-clad doors can be more efficient than solid wooden doors. No matter what the material, ill-fitting doors lose energy and can make your home drafty and uncomfortable.

What to Look For

  • Doors made of materials with high insulating values, such as fibreglass, vinyl, or steel.
  • Wood, vinyl or thermally broken metal frame.
  • Low air leakage rates (for pre-hung door systems).
  • Maintenance-free framing materials.
  • A high energy efficiency rating or a minimum of double glazing with a 12 mm (half-inch) or greater air space.

Things to Consider

  • Make sure that windows, doors and skylights are ENERGY STAR® certified and hire a professional installer to ensure they perform their best.
  • Warranties differ from door supplier and type; compare before you purchase.
  • Check with your municipality, utility or retailer to see if there are any rebates available.


$200 or more per door.

Source: Natural Resources Canada