I removed the PTAC unit in our greenhouse after we installed a mini split last year. The project was to just replace the paneling with the PTAC cutout with new wood to hide the hole. I pulled off the trim pieces and started on the paneling and this is what I found.
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The water stain runs the length of the 14’ wall and it appears that the leak has been going on for some time now. There is no trace of water stain on the cedar trim piece that ran along the floor. I plan to remove the trim pieces on the other two walls to see if the stains are on the other two walls as well. The concrete and bottom of the paneling is currently wet. The room was added on 4 years ago. Can anyone offer suggestions on how this is leaking? Can anyone offer advice on how this can be fixed?
We did have a problem with icy windows last winter with the dehumidifier problems but I doubt that this problem accounts for all of this water stain.
I am so glad this got discovered now.