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Insulating Basements

Makes sense to me, warm move to cold, moist move to dry, if the beer can is cold you get condensation
 
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The code requires the vapor retarder on the warm in winter side which should mitigate it....what it doesn't do is regulate a wet basement....Really....
 
Mostly a very good video!
Is why most in my location use closed cell foam applied directly to the interior foundation wall.
For my climate location, 1.5 to 2" is all that's needed for normal indoor RH levels.
No condensation and an amazing vapor barrier..

Exterior insulation hardly ever continues above grade, and when it does it needs to be covered.
It IS the best way to do it, BUT there are downfalls.
Forget about the foundation wall when there is an outside basement entrance.
Additionally, I know very little about termites (We seldom have them) or other burrowing insects, but exterior foam I don't believe can stand up to that well.

Lastly, every effort should be made to condition that area, which now has its own concerns...
atmospherically drafted appliances ? Radon ?
If appliances are natural draft, make a boiler room that has vents to the exterior.
 
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