Moisture Problems Continued…
Upgrade or replace windows
Windows are usually the first place where you notice condensation because they are the coldest surfaces inside the home. New window technology offers improved insulating value and can greatly reduce condensation. (But replacing your windows is not your first solution to a moisture problem. Reduce moisture sources before performing costly measures, such as replacing windows.)
If you are thinking about replacing deteriorated windows, consider upgrading to high-performance windows, which have special “low-E” coatings and are filled with inert gases such as argon or krypton. The additional cost is usually less than 10 percent, and the energy savings are considerable. For more information on energy-efficient windows, refer to Natural Resources Canada’s publication entitled Consumer’s Guide to Buying Energy-Efficient Windows and Doors.
Basic Facts About Moulds |
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Moulds (also called mildew or fungi) are parasitic microorganisms that appear as a black, white or multi-coloured stain or “fuzz”. Mould spores can cause asthma and other allergies. Some moulds also release complex chemicals into the air called mycotoxins that can cause serious health problems. There are tens of thousands of varieties of moulds, and identifying them is a difficult and expensive task, even for experts. Therefore, health officials recommend eliminating all moulds from inside your home. Most mould spores need “free water” (in other words, condensation or damp materials) to germinate. However, once mould colonies are established, many generate their own moisture and can continue to survive even under dry conditions. Moulds also need mild temperatures and a source of food, such as house dust or drywall paper. |
If your home’s windows are still in good condition, consider installing some type of interior storm-window kit over the entire window and frame during the heating season. This effectively adds a layer of glazing, prevents air leakage, and brings the inner surface of the window closer to warm air currents. Condensation will be reduced or even eliminated, comfort will be improved, and energy bills and drafts will also be reduced. Thin plastic film (“shrink-wrap”) kits, which are available at hardware stores, are inexpensive but must be replaced each year. Other systems, such as rigid plastic sheets, are more expensive but can be re-used for several years. If condensation is occurring between the panes of older unsealed windows (for example, a permanent window plus a storm window or two single glazed slider windows), try sealing the interior unit with weather stripping.
If condensation is occurring between the panes of a sealed double-glazed unit, the unit will eventually have to be replaced.
…To be continued February 8th, 2012.
