Fermentation chamber insulation

[Plan9]

This has probably been covered already.

When building a fermentation chamber most people use rigid foam with an R value of about 5.
What about using fiberglass which has a rating from 19 to 30?

 

[IslandLizard]

You get R19 at 6" of fiberglass. Foam would be around R15 then.

Sure you can use fiberglass as long as you keep it dry. Don't use in bottom areas.

 

[Plan9]

That makes sense. Thanks!