Condensation around the windows sealing inside the house? I'm not sure the air is coming in? How to seal it?

Question

I want to make it air proof? I dont know how to check whether the air is coming in slightly or not? but I can see the water just above the window seal

Answer 1

The reason you are having this problem is that the humidity in your house is high. ALL windows, including vinyl, wood and metal will condense if there is excessive moisture in the air. It doesn't mean that air is coming in, although that is a good source as well. It also doesn't mean you need new windows or need to keep them opened. Lower the humidity inside. Use bathroom and kitchen fan vents for 20 min. after you bath or cook. Turn off humidifier (if you have one). This will help. Use a dehumidifier set at 40% and let it run as long as it needs. You can get an inexpensive hygrometer (humidity detector) and put it in your house.

Contrary to popular belief, moisture in the air in winter is just as high as it is in the summer, it just doesn't feel like it because it's cold air. When the temp is at or around 30F outside, the inside air should be about 30% in order for condensation to be kept at bay. As the temp drops, so should the humidity. Feel free to email me with any other questions you may have.

Answer 2

First and foremost you need an accurate reading of your indoor humidity level. It should be below 50 %.
Even top quality windows will show condensation at the least insulated parts.
If you have an aluminum or steel frame this would show moisture first as most do not have a thermal break.
As for checking for air leakage the easiest thing to do is get a stick of incense and slowly move it around the window and watch the smoke for movement (airflow).
If resealing is required caulking can be applied to the non moving areas. Don't caulk a window closed especialy if it may be needed for egress in the case of a fire.
Be sure area to be caulked is clean and dry. Only use silicone caulk where you do not need to color match it as it is not paintable.
Good Luck.

Answer 3

you need new windows. the ones you have are probably OLD and cold air from outside is coming in thru them. mix that with the warm air of your house and you have condensation.

i had the same problem and just got new windows installed. no condensation problems now. and i can see outside clearly!lol.

Answer 4

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Answer 5

Condensation is most often caused by having metal window frames....are yours metal? As far as I know the only real cure for this is replacing with uPVC frames.

Answer 6

you need to open night vents on the sashes to prevent condensation if you have PVC.it occurs when warm air hits a cold surface,if you have single glazed it will happen all the time.