I have an excessive amount of moistue in my slab home every fall. I have
had a french drain installed all around the perimeter of my home.I have
had the house checked for plumbing leaks.I have narrow overhangs with
vinyl covering with air holes. The moisture shows up in only one of my
registers....but goes away after running a dehumidifier constantly for a
couple of weeksand does not return until the next fall...any suggestions?

Probbaly a crack or hole in the ductwork coupled with groundwater.

Friend of mine had a slab house inconveniently built over a natural
spring. Hilarity did not ensue.

soggy wrote:
I have an excessive amount of moistue in my slab home every fall. I have
had a french drain installed all around the perimeter of my home.I have
had the house checked for plumbing leaks.I have narrow overhangs with
vinyl covering with air holes. The moisture shows up in only one of my
registers....but goes away after running a dehumidifier constantly for a
couple of weeksand does not return until the next fall...any suggestions?

Maybe you mean ... excessive humidity? (You did say dehumidifier) My
home's the same ... the first few cool nights of fall cause that warm
humid summer air in the house to dump humidity on the cold windows
until the inside/outside humidity levels come to ... an understanding.
Opening a few windows during the transition helps a lot.

In article om, "soggy" wrote:
I have an excessive amount of moistue in my slab home every fall. I have
had a french drain installed all around the perimeter of my home.I have
had the house checked for plumbing leaks.I have narrow overhangs with
vinyl covering with air holes. The moisture shows up in only one of my
registers....but goes away after running a dehumidifier constantly for a
couple of weeksand does not return until the next fall...any suggestions?

What part of the country are you located in? Are you near any
rivers, springs or anything like that?

It seems odd to me. If you have sprinklers or some other means
of artificial irrigation, I'd consider turning them off (or
at least down) just a little earlier in the season.

Also check for sources of condensation (which might be falling/
migrating some considerable distance).

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