foil High-density urethane insulation

[bobabuee]

4x8 foil one sided yellow board found at lowes & HD does foil face go to cinder block wall or does blue side go to the block wall?

 

[jdaallen]

Foil is your vapor barrier and should go to the cold side. There is usually directions printed on the product, sometimes in fine print with the logo.

 

[krooser]

Installing it inside or outside?