Plastic sheeting (6 mil) is applied
to the HOT side of the cellar walls. The vapor barrier must be either applied to
the outside walls and ceiling, or if it is impossible to get to the outside, then
the plastic must be applied from within the cellar.
The most common method is to wrap
the entire interior, leaving the plastic loose in the stud cavity so the insulation
can be placed between each stud. All walls, ceiling and floor must be wrapped in
plastic for a complete vapor barrier.
Insulation is REQUIRED if a climate
control cooling unit is going to be used. The R factor or thickness of insulation
is determined by the thickness of the walls and ceiling. For example, fiberglass
insulation of R13 is designed to be used in a 2x4 wall while R19 is used in a 2.6
wall. It is important to use the correct insulation for the wall thickness.
A minimum of R13 should be applied
to the walls of a cellar. R19-R30 is recommended in the ceiling. Standard "Fiberglass"
or "Rigid Foam" insulation is normally used in cellar construction, or in some cases,
blown in insulation is used. It is very important that all walls and ceiling be
insulated to keep the cellar temperature as consistent as possible during the summer
and winter months.