Why do I have water (condensation) around the patio glass?

Question

I meant patio door.

PLEASE MAKE IT SIMPLE...I know what condenstion is...just tell me why it's happening on my glass???

Answer 1

Curtains in front of the glass will rstrict airflow causing condensation in cool weather. Air flow helps keep windows clear.
Humidity in the house should be low 35%. If its -30 Celsius you should only have about 25% humidity. -20 maybe 30% humidity.

Dehumidifiers are expensive. A high efficiency furnace (vented intake and outward pipes type) should have a fresh air flow to the ducts to assist in reducing humidity. Has to be installed by qualified contractor though.

Answer 2

I see you said around the glass. This could be an air leak, or maybe you have an old aluminum frame .if it is an air leak, find the leak and seal it. If it is the frame, there isn't much you can do about it other then buy a better window. The frame will conduct the cold faster and more readily then the window itself. Humidity in your house is reaching the dew point closet to the frame ,,( Air will normally contain a certain amount of water vapor. The maximum amount of water vapor, that air can contain, depends on the temperature ) since the glass is colder then the room temperature, and can not hold as much moisture in vapor form, (or vapor state) It is condensing around the window.. Hope this helps.. Also check to see if you have a humidifier on your furnace, if so check the setting at the Humidistat, and shoot for a setting of around 35% humidity. Make sure it is also shutting down when the furnace shuts off. If you run ur blower all the time on your furnace, and the humidistat is powered thru the blower circuit then it could be running your humidifier way to much,, this would have to be corrected to where the Humidifier only is powered on a call for heat.

Answer 3

The heat on the inside of the house is warmer than the outside which causes condensation.

You don't have to look at something as far away as a cloud to notice condensation, though. Condensation is responsible for ground-level fog, for your glasses fogging up when you go from a cold room to the outdoors on a hot, humid day, for the water that drips off the outside of your glass of iced tea, and for the water on the inside of the windows in your home on a cold day.

Answer 4

heres a simple answer you have a rip/gap in the rubber molding on your door thats if its a 2 pane glass patio door if its not 2 pane then your inside temp is warmer then outside temp

Answer 5

You have an air leak somewhere. Or,you may have alot of humidity in your place. The air leak could be just a piece of weather stripping that has come loose.