Lucrecia Anderson wrote:Uhhh....pretty sure it is NOT normal to have ice on the inside of your windows.
Mike Jay wrote:
Sorry Lucrecia but it is relatively common when the outside temps get down to -10F or so. Assuming your house is at 65 degrees and it's -20 outside, the window panes are somewhere in between. Odds are the interior pane is below freezing. That means that unless the house is below 30% humidity, it's condensing and then freezing. Two winters ago we dehumidified our house for weeks and got the humidity down to 25% and we still had tons of condensation and freezing. With a 1960's house and new double pane windows.
L Goodwyn wrote:This is the danger of upgrading an older house.
Back to make up air, if you upgrade windows and heating systems make sure you have adequate make up air
to not create a closed loop system.
This will eliminate your condensation problems.
Dan Box wrote: I'll have to look at the plastic film again - we have pretty big windows so it could be an ugly solution.
One of the best things you could do for the long term would be to figure out a way to bring fresh air into the house across a heat exchanger. This is the essence of Passivhaus ventilation
Timmy Eco wrote:Might want to see if your windows need a refill of Argon.