Preparing Your Space for Proper Climate Control.

To properly control temperature and humidity, your wine cellar must be insulated and sealed with a vapor barrier. Eco-friendly spray-foam, professionally applied, is a recommended alternative for insulation and vapor barrier.

Space Prep 1
Space Prep 2
Space Prep 3


  • Construct the cellar walls with 2″x 4″ framing.
  • Use R-13 faced insulation, plus a layer of ¾” high-grade foil-faced insulation board such as Celo-Tex or High-R.
  • Put foam board on the side of the walls away from the wine and insulation face toward the wine.
  • Tape seams of the foam board with foil tape; the edges are caulked to make the whole unit hermetically sealed (foil-faced insulation board in this case acts as the vapor barrier).
  • Floor grouted or finished tight to the walls.
  • Make sure walls are painted to the floor.

Wall Material

Finished wall material inside the wine cellar can be m-r gypsum board, stucco, or a damp resistance wood such as cedar or redwood. It should be finished tight to the floor.

Framing Insulation

An alternative framing-insulation pattern is to use 2″x 6″ framing members, 6″ of fiberglass batt insulation, and 4 mill plastic vapor barrier on the outside of the wine cellar. Caulk the plastic tight to the perimeter of the walls with Phenoseal latex adhesive.


If the ceiling has existing joists, cut strips of 4-mil plastic and staple it between the joists. Eight inches of fiberglass is the minimum required insulation on the ceiling.


Doors are exterior type with a good weather seal and caulked tight to the floor, jambs, and header. Floors: Install a vapor barrier under the floor; for concrete floors, treat with a water sealant.


Whenever possible, use surface-mounted lights and avoid recessed lights that will compromise the insulation and vapor barrier.

Need Help? Just contact us. We will guide you through the process.