If you have metal frame window and the water is condensing on the metal
frame, then one solution is to replace them with vinyl frame windows.

The other solution is to reduce humidity inside the house. Use bath fans
when taking shower, use kitchen fan when cooking, don't use humidifier,
reduce indoor temperature, ... I use to use humidifier in the winter. Then
one day I wonder, where has all the evaporated water gone to? Probably
inside the wall. So I stop using the humidifier and instead drink more
water.

I also read that an air-to-air heat exchanger, which lets your house breath
without losing alot of heat, helps reduce indoor moisture.

wrote in message
ups.com...
We have double pane windows in our almost 4 year old house. The inside
of the window has lot of condensation and water drops forming and
collecting on the window sill. Is this normal? My homeowners manual
says that this happens "due to good insulation" and it's not under
warranty?

Could someone please explain what I should do? Is this because of good
insulation or poor insulation? Is there anything I can do to prevent
this from happening?

Thanks.