Moisture Issues: please see all links at:
http://www.buildingscience.com/resou...re/default.htm

water bill high due to hidden water leak in wall. roof and gutters
leaking or backing up shingles into house. [what frost in attic?].
issues with brick house moisture. maybe issues with insufficient daily
air change. large population home versus small square footage. no whole
house ventilation for air changes. clothes dryer requires outside
venting. kitchen just filtered fan change to vented to outdoors.
rainwater not properly draining away from home. poor insulation. poor
weatherstripping. candles in use. unvented gas log heater in use.
central air conditioning with central ventilation required. faucets
dripping. humidifier in use. vaporizer in use. gas pilot lights burning
in kitchen stove and oven. houseplants. aquariums in use. showering
without exhausting. washing machine dumps into washtub change to
standpipe.