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What Are Your Options?
The following are four basic options for upgrading the energy efficiency of your windows:
- repair (see sidebar at right)
- retrofit using caulking and weatherstripping
- reglaze by installing exterior or interior storm windows
- replace the window or parts of the window
Assess the Situation
As a first step, carefully assess the condition of each window in your house. Check for ease of operation and note whether the window has any defects, such as loose joints or glazing, warpage, damaged or worn weatherstripping, rot or faulty hardware. You may find that some windows need only minor air-sealing work, while others require major upgrading or even replacement.
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Indoor Air Quality and Condensation |
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Sealing against air leakage can reduce heat loss and energy bills, but it can also affect indoor air quality by reducing natural ventilation or by restricting the amount of air available for certain combustion appliances (which may cause them to spill dangerous by-products into the house).
As well, you should be aware that in some cases improving the airtightness of existing windows or installing energy-efficient windows can lead to increased condensation because moist air is trapped in the house. Take steps to address the moisture problem
by reducing the sources of moisture.
If you are undertaking extensive air-leakage control measures or if your home is experiencing moisture problems, consult the publications offered by Natural Resources Canada's (NRCan's) Office of Energy Efficiency (OEE) or those offered by the Canada Mortgage and Housing Corporation (CMHC) for information on indoor air quality and/or condensation. |
Do It Yourself or Hire a Contractor?
The products and systems described in this fact sheet are widely available at hardware and building supply stores and are generally easy to use. However, some projects (particularly window replacement) will require the services of an experienced contractor. For information on hiring a contractor, read the Canada Mortgage and Housing Corporation's (CMHC's) fact sheet No. CE 26, Hiring a Contractor, available free through its Web site.
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This article is from Natural Resources Canada web-site
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