Help with A Science Question

[ILMW]

I have a nicely built shed (Amish style) 24X10, inside that shed I built a room that is 10 feet wide by 8 feet deep. Inside the room I insulated the walls and sheet rocked them as well. I have a small vent (side vent that was already installed that actually is part of the wall and a cut a small hole in the other wall of the sheet rock to allow air to pass. I had a small garden that grew in early spring of 06 into the fall of 06 with no problems. The light inside was about 1000 watts and all in all the tempature in the room was 70 degrees inside while a bit warmer outside. As the seasons began to get cooler outside the shed 50 and 40 degrees the tempature remained 70 degrees inside the room. By early november I had to stop due to a severe moisture problem not inside the room but inside the shed. I removed my garden as well as my light and the mold and moisture problem stopped. I tried a dehumidifier and this did not seem to work to solve the problem. Can someone tell me what might have solved this problem or is it because of the warm air meeting the cold air inside the shed overall which caused the mold on the ceiling between the 2X4's. Thanks alot.

[tomgwyther]

A small room, within a shed, with a powerfull light inside?

 

Are you growing pot?

[Glider]

Whatever plants you grow, they will transpire (i.e. release water through pores on their leaves). This will result in elevated humidity. All plants do this. It's why greenhouses have such a high relative humidity.

 

You will need to provide adequate ventilation to solve the problem. An extractor fan in the wall should deal with it. The air inside the room needs to be changed regularly. An extractor fan (the kind you find in kitchens and bathrooms) would vent the humid air out and keep the humidity more or less the same as the outside air.