Is wood bad in walk-ins?
First of all, wood is not a good insulator. Second, wood absorbs moisture. In a freezer it can then freeze and swell causing the joints to misshape and leak precious cold. Third, damp wood is a food source for mold and can cause mold to grow inside the panel and possibly cause negative health affects. Finally, wood can absorb water vapor lowering its already low R-value. This water vapor, through freeze and thaw cycles, causes water to run down and either freeze inside the walk in or run outside the walk in causing an unsafe slippery floor increasing injuries and liability issues. Therefore wood is not desirable in walk ins.
