I was inspecting several condominiums today in one complex and the windows condensate so much that there is mold growth noted at the side of the interior window framing. I looked at the AC and did the temp drops and they are acceptable. Humidity level within the house was at 51% and the temperature was 74 degrees. The condensation only occurs at the interior of the window. The windows are hurricane rated windows (thick) and the condos are about 4 years old.
The only thing I can think of is that there are cheap plastic blinds and the AC/Heat is pointed right at the windows and the when the heat or AC is activated it reached dew point, thus creating the condensation. There is no water staining at the windows at all indicating it is a leak from the exterior.
Could use some ideas…Now when thinking remember where i live is very different. I live in SW Florida which is almost a tropic climate. I gets to be about 75-80 degrees in the day and sometimes dips into the low 40’s at night. I can think of nothing else besides it reaches dew point and causes condensation.
Is there a cheap test for it? Like cover the window with plastic…something? Thanks for the help!