Checklist: Moisture Problems in All Living Areas
- Condensation on windows.
- Rotting windowsills.
- Damaged gypsum board and bubbled or flaking paint.
- Musty smell.
- Mould on walls.
- Mouldy drapes, carpets or furniture.
- Mould in closets.
- Poorly set and controlled humidifiers.
- Excessive moisture from damp basement or crawl spaces.
- Many moisture-producing activities by occupants — cooking, bathing, washing.
- Too many people/pets in the home.
- Uncovered aquarium.
- Large number of plants.
- Firewood stored inside.
- Poor air circulation between rooms or within a room.
- Cold surfaces due to inadequate insulation.
- Large air leaks at electrical fixtures and outlets, window frames, etc.
- Closed drapes preventing warm room air from warming window surfaces.
- Closet contents stuffed against colder exterior walls.
- Rooms kept too cool, programmable thermostats setback too aggressive.
- Inadequate ventilation, ventilation equipment not used.
- Air conditioner poorly maintained, condensation on cold water pipes during the summer.
- Discontinue or control humidifier use.
- In summer use a dehumidifier.
- Fix sources of moisture in basement or crawl space.
- Install and use quiet, energy-efficient kitchen and bathroom exhaust fans.
- Cover aquarium.
- Reduce number of potted plants or make covers for the soil.
- Circulate air between rooms by running furnace fan continuously on low speed. Ensure air can circulate within rooms — particularly over colder surfaces.
- Properly insulate cold surfaces.
- Wipe up condensate that may form on windows during colder weather.
- Seal air leaks.
- Reduce stored items — particularly those in proximity to outside walls, basement floors that limit air circulation.
- Open drapes and blinds to promote air flow over windows.
- Ensure 2.5-cm (1-in.) gap at the bottom of closets and doors; leave closet doors open during cold weather.
- Provide heat to all areas.
- Install a balanced ventilation system, such as a heat recovery ventilator, and use it regularly.
- Keep air conditioning drip pans clean and the drain lines unobstructed and flowing properly.