Window condensation and repair

Old 12-11-07, 01:33 PM
Thread Starter
Join Date: Dec 2007
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
Window condensation and repair

Hi All,

At the end of March we moved into a a house built in 1985. In the living room is an arched (don't know the term really - a 5 window bay?) window. We repainted the room and insodoing realized that it is the only window in the entire house that was not replaced a few years ago - the house has all new argon-filled windows - except for these! We also noticed that they look like they are double-panedglass - 5/8" thick, 5'x18", and probably home installed (like everything else the previous owners did).

When we were painting we realized that the atrocious dark teal paint was beneath the messiest non-paintable silicon job we had ever seen. It has gray mold growing under it. Also, the 3/8"x1" trim holding the windows in place (is there a term for that?) was rotting in places.

In May, we started removing the trim and silicon, with the idea of replacing it. It got put off when spring came (there was a garden to plant), and then I had a baby and it got put off longer. Well, now it's December and we noticed that after the -20C weather we've been having that there was at least an inch of ice around the bottom and sides of the windows.

My obvious question is - what is the best way of re-framing the windows?
What is the best way of decreasing the condensation on the windows? Is the wooden 3/8"x1" enough? (I doubt it)
Can we put in expanding foam around the window and under the wood - would that work to cut down the condensation?
Should it wait until spring when things are warmer?

Obviously I know little about these things. My original plan (in May) was to simply replace the wood. Now, however, I know there is a bigger problem that needs to be addressed.
Old 12-11-07, 03:30 PM
Join Date: Oct 2006
Location: Wilmington
Posts: 3,994
Upvotes: 0
Received 0 Upvotes on 0 Posts
DO NOT USE EXPANDING FOAM in or around the window. It can push things out of whack and cause all kinds of problems. There are non expanding foam products(DAP Foam) that work well around doors/windows. You apparently have air leaks and and a lot of moisture(humidity) in the house, this will cause the problem you describe on windows that are less energy efficient than the newer ones. Wintertime humidity should not exceed 50%. If it does, you will have problems. Seal up the gaps around the window, under trim moldings etc., lower the humidity, and let us know how things work.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: