Foggy, icy, or dripping windows are common in Alberta winters. While condensation may seem harmless, it can cause serious damage over time. Learn what causes it, why it matters, and how to protect your windows & home this winter.
What causes window condensation in winter
Cold outdoor air meets warm, moist indoor air from cooking, showering, and even breathing. When this air touches cold windows, water droplets or frost form. Single-pane or older windows are most affected because they are not well insulated.
Why window condensation matters
Condensation can harm your home and increase energy costs.
- Mold & mildew: Moisture encourages mold growth, which can trigger allergies or asthma.
- Damaged windows & walls: Water can warp frames, weaken seals, and damage drywall.
- Higher energy bills: Warm air escapes, forcing your heating system to work harder.
How to prevent window moisture
Simple steps can reduce condensation and save energy.
Check your windows regularly
Inspect windows for pooling water, frost, or mold. Wipe moisture immediately and clean to prevent mold from spreading.
Open blinds & curtains
Closed blinds trap cold air. Open them a few inches to let warm air circulate. Use a towel on the sill to catch melting frost.
Adjust your humidifier
Turn built-in humidifiers down to 10 percent or off during extreme cold. Alberta’s dry air usually keeps indoor humidity at around 20 percent. ATCO Energy can help install humidifiers that add the right amount of moisture without creating condensation.
Use a dehumidifier in problem areas
Basements, attics, and bathrooms often hold more moisture. A dehumidifier reduces condensation and warms chilly spaces slightly.
Replace old windows
Condensation between window panes or cracked seals signals it may be time for replacement. Modern energy-efficient windows keep your home warmer and lower heating costs. ATCO Energy Home Services can help with professional window upgrades for Alberta winters.
How to handle mold & moisture damage
Mold is a health hazard, especially for people with allergies or asthma. It also causes stains and odors. ATCO Energy offers mold inspection & remediation to keep your home safe and healthy.
Extra tips to reduce condensation
- Use kitchen & bathroom fans while cooking or showering.
- Seal leaks around windows & doors with caulking or weatherstripping.
- Keep furniture away from windows to allow airflow.
Condensation & home energy loss
Condensation can indicate energy loss. Warm air escaping through old or damaged windows makes rooms colder and increases energy bills.
ATCO Energy Home Services specializes in mold inspection, remediation and window & door replacement to protect your home, save energy, and keep you comfortable all winter.
Frequently asked questions about winter window condensation
Q: What causes condensation on windows in winter?
A: Condensation happens when warm, moist indoor air meets cold window surfaces. Activities like cooking, showering, and breathing add humidity, which forms water droplets or frost on your windows.
Q: Is window condensation harmful?
A: Yes. Over time, condensation can cause mold growth, damage window frames, weaken seals, and even increase energy costs by letting warm air escape.
Q: How can I prevent condensation on my windows?
A: You can prevent condensation by checking windows regularly, opening blinds & curtains to circulate warm air, adjusting humidifiers, using dehumidifiers in problem areas, and replacing old or inefficient windows.
Q: When should I replace my windows?
Replace windows if you notice condensation between panes, cracked or worn seals, or warped frames. Modern energy-efficient windows keep your home warmer and help lower heating costs.
Q: How does condensation relate to mold problems?
A: Excess moisture on windows creates an environment where mold can grow. Mold can affect your health and damage your home. Early detection and professional mold remediation are important.
Q: Can ATCO Energy help with condensation issues?
A: Yes. ATCO Energy Home Services can help with mold inspection & remediation, as well as window & door replacement, ensuring your home stays safe, energy-efficient, and comfortable all winter.
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