I want to build an 12X20' walk-in freezer. I'm going to use treated 2X4 in walls, with vapor barrier and blue insulation to get an R-19 value in the walls. First question, in what order does the blue insulation applied, when is blue insulation applied.
Same with ceiling, I'm using 2X6"'s with foam board of R-30. Is the vapor barrier placed in the inside of the cooler to cover the board, or the outside against the wall. Is a dead air space advisable? This is for a liquor store, and will be used to keep beer cold. Temperature will not run below 28 degrees.
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