I was looking at a house today (to purchase) but noticed that even though the living room window in the front of the house is double-pane, there is a lot of condensation on the inside of the window. What could be the cause? Room temperature was average, and outdoor temperature was average... The house is vacant, so the cause can't be cooking/boiling water, etc. I'm now wondering if I should offer a certain amount less than asking price, to cover the cost of replacing the windows......or maybe it's not a big deal? I'm just wondering what the cause could be... (One time in the past when I was going through the house, the fan in the bathroom was on. (It has a humidifier/thermostat control (not sure what it's called) that turns the fan on automatically when it is humid.) I'm just finding it odd, since no one lives there. The place is empty........ Also, it is only 12 years old. Thanks for any input. Marie

I have a double hung crestline window in the kitchen, maybe 35 years old. the plastic jambliners are failing and generally it is poorly made anyway. I want to replace it with a new casement window. I have never done this type of work before but wonder if anyone can give me a clue of what to expect when I try this job. Maybe even a small cookbook list of how to. thanks