Moisture Inside wall

I recently replaced my kitchen wall. I replaced it with the foil rigid foam. 3/4in because it is on a exteror wall with fur strips. About a year later I have mold coming out near the outlets.

I remove the drywall and foam. I noticed the mold was only on the wood section. (not Black Mold)

So I replaced it with what it original had. It goes exterior wall, fur strips, unfaced insulation between the fur strips, then 6mill poly on the whole wall.

About a month later (haven’t put the drywall up yet) I notice I have condensation (water) on the Plastic and the wood is soaked with water. I keep my house at 76-77. This was in the summer time.

Now that it is winter I have no condensation on the plastic or the wood. There are no leaks in the roof.

I can take pictures if need be.

Do they still use the 6poly mill in Florida? What is the correct way of doing this? Where is the water coming from?

Palm bay Fl 32909

1 Like

You are are getting condensation in the wall. This is a function of the hot and cold surfaces and humidity. First make sure the exterior is properly sealed/painted. Next dry the area, remove the moisture barrier and properly finish the interior wall including sealing any gaps.

Cool air from the interior will cool the surface and cause condensation with humidity in the air.

There is a host of information on the internet about sealing and insulating walls in a high heat HIGH humidity environment. Do this wrong and you will always have issue. It is different than from a dry/cold environment.

I hope that helps

Only under the slab. Never in the walls or ceilings as a vapor barrier. That is a cold zone practice.