I have a few qustions regarding Basment Insulation and Condension.
From what I have read Spray Foam and Rigid Foam are the safest way to go in a basment.
I do not understand why you can not do this
1. Seal interior concrete foundation with densifiers and/or dryloc type products
2. Use dimple board or tyvec paper covering entire interior of foundation (Semi-Permeable simlair to foam products).
3. Install fiberglass insulation over dimple board or tyvec paper
(For the first foot of insulation above the basement floor grade install roxsul and then convert over to fiberglass insulation)
The reason why I am asking this is because foam is expensive and I am trying to find a more cost effective solution. This question has nothing to do with water problems, just vapors entering your house via the concrete wall and floors and insulation
Replies
Blog post in Green Building Advisor
Here's some info on the topic.
http://www.greenbuildingadvisor.com/blogs/dept/musings/how-insulate-basement-wall
I also checked the topic on grren building adviser and found informative and could be solution to the problem.
One needs to keep in mind that the term "basement" does not very precisely specify the conditions that are present. One size definitely does not fit all.
What Dan & Andy said. Also,
What Dan & Andy said.
Also, things can change depending on whether you are in a primarily heating climate or primarily cooling climate.
You mention sealing the interior side of the concrete. Can you be absolutely certain that the exterior treatment will never allow moisture penetration?
You mention a different product (roxul, which I've never heard of. Rock wool perhaps?) for the first foot. Why?