I am finishing my basement and have the 2x4 studs up and ready to start the insulation. I have been hearing that you don't want to put vapor barrier on so I'm trying to find out what is the proper way of doing this. We have put a sub floor in that is insulated with a 6mil vapor barrier on it. Is that going to be problem??? We were and have already bought the unfaced fiberglass insulation bats for the walls. Thanks.

[Linas Dapkus]

[QUOTE=Unregistered;844279]I am finishing my basement and have the 2x4 studs up and ready to start the insulation. I have been hearing that you don't want to put vapor barrier on so I'm trying to find out what is the proper way of doing this. We have put a sub floor in that is insulated with a 6mil vapor barrier on it. Is that going to be problem??? We were and have already bought the unfaced fiberglass insulation bats for the walls. Thanks.[/QUOTE]

What type flooring are you installing? Why did you purchase unfaced batts?

I first used 2x4s ( green treated) flat down 16" on center with fiber glass insulation in between with 6mil vapor barrier then 3/4" osb on top. We plan on using lament on that. We did a test before we started ware we taped a piece of plastic down to the floor to check for moisture and left it there for 4 days with no moisture on it at all. As far as the unfaced bats that's what our home center recommended.

[David A. Andersen]

Lets start with where do you live...

[An HI]

[QUOTE=ldapkus1;844292]What type flooring are you installing? Why did you purchase unfaced batts?[/QUOTE]

The facing on the batts is impossible to airseal cheaply; most people concerned with better energy conswervation techniques use a sealed poly vapour over the faced batts, making the facing redundant.

South central Wisconsin

[An HI]

[QUOTE=Unregistered;844330]I first used 2x4s ( green treated) flat down 16" on center with fiber glass insulation in between with 6mil vapor barrier then 3/4" osb on top. We plan on using lament on that. We did a test before we started ware we taped a piece of plastic down to the floor to check for moisture and left it there for 4 days with no moisture on it at all. As far as the unfaced bats that's what our home center recommended.[/QUOTE]

Depending on the type of preservative treatment for the wood, maybe you shouldn't have used treated wood indoors. Various sources of the web have varying opinions. Check about the source of your wood and its treatment chemicals.

Fiberglass insulation is cheap but I would have recommended a rigid extruded polystyrene or even better, used one of the basement subfloor systems such as Dricor with dimpled plastic to raise the wood from the concrete away from potential soil moisture, minor leakage, or the one that has extruded foam attached to the subloor 4'x4' T&G panels. Another technique is to lay the dimpled plastic Platen down and then place a T&G panel subfloor over it.

I live in south central Wisconsin.

South central Wisconsin.

I live in south central Wisconsin.

Wisconsin.

Wisconsin

Wisconsin.

Sorry about that. I thought I was doing something wrong so kept trying to reply. I guess it just wad a little slow.

[Bob Elliott]

http://www.nlcpr.com/Mold.php

http://www.buildingscience.com/documents/digests/bsd-106-understanding-vapor-barriers

http://www.homeconstructionimprovement.com/how-to-insulate-basement-walls/

http://alsnetbiz.com/homeimprovement/basement.html