Mold at window glass/vinyl interface

"George Abbot" wrote

Good one! I've the same problem on some of my windows (older ones, not the new energy star ones). I'll be interested in the replies!

If moisture condenses on glass your humidity is to high. If you have a whole house humidifier that can easily happen, April Air makes a unit that tracks outside temp with a temp probe outside, you set the unit just below any condensation starts and it keeps it at the optimal humidity. Cheap windows can also condense easily. New windows are rated for condensing properties, CDF factor, Pellas are not real good in a new tight house, Anderaon are better.

Despite keeping the house as a whole at a good humidity, there's still a little consendation at the bottom of the bathroom windows. So part of my morning routine is to wipe up the condensation to leave a dry window. Marvin window, if it matters.

Banty

One additional major fact- we have steam heat which is the reason for most of the condensation. Plus, we keep the house cold at night. It is almost impossible to prevent condensation.

GA