How to fix these problems

Location	Problem	Corrective Measures
Basement	Musty odour, black, white or multi-colour discolourations, dampness, moisture and condensation indicate molds	view
Basement or crawl space with dirt floor	Musty odours due to molds	view
Cold cellar	Likely place for molds	view
Walls, ceilings	Stained, discoloured, mold growth	view
Wet windows	Rotting, peeling paint, discolouration	view
Carpets in basement	Collect moisture and odours; likely places for molds to grow	view
Carpets elsewhere	Collect moisture and odours; older carpets cause stale, stuffy air	view
Clothes, paper, furnishings in basement	Material absorb moisture and can become moldy	view
Open sump pit	Source of moisture and molds	view
Kitchen, bathroom sinks	Unpleasant odours	view
Floor drain	Can be site for mold growth: odours can back up into house	view
Bathrooms	Unvented moisture can lead to molds	view
Closets	Cold walls can lead to condensation	view
Water leaks	Visible stains	view
Attics	Moisture and mold problems from house air leakage into the attic space；also animal droppings	view
Humidifier trays (also dehumidifiers, air conditioners, refrigerators, laundry equipment)	Standing water supports micro-organisms	view
Filters (furnace air conditioner, heat recovery ventilators)	May be loaded with dust	view
Potted plants	Soils can support fungal growth	view
Other moisture-producing activities	Moisture, various biological contaminants	view
Damp, dirty surfaces	Support mold	view
House dust	Supports dust mites	view
Pollen and other particulates from outside	Seasonal; cause allergies	view
Pet dander	Some individuals are allergic to some animals	view
Smoking	Gases and particulates	view
Pesticides	pest control products are human poisons	view
Unvented gas fireplace, kerosene or gas heater	Combustion gases	view
Gas or propane stove	Combustion Gases	view
Gas water heater	Combustion gases	view
Gas or oil furnace	Unburned gases and combustion gases, odorous additives	view
Wood stove or furnace, fireplace	Unburned fuel, combustion gases	view

Secondary Menu

How to fix these problems

Basement

Basement or crawl space with dirt floor

Cold cellar

Walls, ceilings

Wet windows

Carpets in basement

Carpets elsewhere

Clothes, paper, furnishings in basement

Open sump pit

Kitchen, bathroom sinks

Floor drain

Bathrooms

Closets

Water leaks

Attics

Humidifier trays (also dehumidifiers, air conditioners, refrigerators, laundry equipment)

Filters (furnace air conditioner, heat recovery ventilators)

Potted plants

Other moisture-producing activities

Damp, dirty surfaces

House dust

Pollen and other particulates from outside

Pet dander

Smoking

Pesticides

Unvented gas fireplace, kerosene or gas heater

Gas or propane stove

Gas water heater

Gas or oil furnace

Wood stove or furnace, fireplace

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