Monitor your basement’s humidity and avoid relative humidity above 50 per cent. Check basement pipes for condensation or dripping and, if necessary, take corrective action; for example, reduce humidity and/or insulate cold water pipes. Use a dehumidifier to maintain proper humidity levels.
Check your basement floor drain to ensure the trap contains water; refill if necessary. Also, if you have a plumbing fixture that is not used often, such as a spare sink or tub, run some water briefly to keep water in the trap. Keeping water in traps prevents sewer gas from entering the home.