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[Jwood]

Why not just vapor barrier it then if not insulting just trying to stop air movement.

[DaveWertz]

Well from my understanding with this bubble wrap and them taping up the seems it acts as a vapor barrier.

[Jwood]

Except if you are not gaining anything by using bubble wrap foil poly is a heck of a lot cheaper.

[DaveWertz]

Poly?

[Jwood]

Poly as in plastic

[hondaracer2oo4]

Radiant barrier foil has a few applications. Please read these two articles as a starting point so you can understand how and what it actually does. You are wasting your money in the application that you want to use it for.

http://www.greenbuildingadvisor.com/blogs/dept/musings/stay-away-foil-faced-bubble-wrap

http://www.energyvanguard.com/blog-building-science-HERS-BPI/bid/29497/The-Foil-Faced-Bubble-Wrap-Sham-Understanding-Radiant-Barriers

[Jwood]

All I'm trying to say is if you want to stop air just use poly. Save yourself some money!

[coolidge]

Sprayfoam the exterior walls and you will see a huge difference.
If it's in the budget of course.

[coolidge]

Before and after the concrete wall was insulated with 2" of closed cell foam.

[DaveWertz]

Coolidge. How well will this hold up to water? Part of my basement is stone wall foundation while the other half is block. The stone wall side does seep water when we get heavy rains. This one one of my main concerns as to why I never did anything with the walls. I would hate to insulate them and in return the water ruins whatever I may have done.

[coolidge]

Dave,    The closed cell foam will still allow water in, the water will seep through the cracks in other areas of the rock. Water gets where it wants to go every time, just takes longer to show.