Stan Brown wrote:
wrote:
krw wrote:
says...
To avoid mold, keep the RH below 60%.

You have to avoid anything in the room below the dew point too.
Windows and frames often "sweat".

At 100 vs 60% RH.

The RH in my home was 35-45% all last winter, but window frames
sweated almost every morning. I don't understand it...

The RH of the room air near the windows was 100%.

Nick