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R-Value Table: Wine Cellar Construction Guide

When building a wine cellar, use the following table to assist in calculating the R-Value for various construction materials that you may use in your wine cellar. If you need assistance understanding the charts, don't hesitate to contact us.

Materials

R-Value

Per InchStandard
Thickness

INSULATION

Fiberglass Batt3.15 - 4.30
Fiberglass Blown (attic)2.20 - 4.30
Fiberglass Blown (wall)3.70 - 4.30
Rock Wool Batt3.14 - 4.00
Rock Wool Blown (attic)3.10 - 4.00
Rock Wool Blown (wall)3.10 - 4.00
Cellulose Blown (attic)3.60 - 3.70
Cellulose Blown (wall)3.80 - 3.90
Vermiculite2.13
Rigid Fiberglass4.00
Expanded Polystyrene (Beadboard)4.00
Extruded Polystyrene5.00
Polyurethane (formed in place)6.25
Polyurethane (foil-faced)7.20

CONSTRUCTION

Concrete Block 4"0.80
Concrete Block 8"1.11
Concrete Block 12"1.28
Poured Concrete0.08
Brick 4" common0.80
Brick 4" face0.44
Soft Wood Lumber1.25
- 2" Nominal (1 1/2")1.88
- 2x4 Nominal (3 1/2")4.38
- 2x6 Nominal (5 1/2")6.88
Cedar Logs & Lumber1.33

SHEATHING

1/4" Plywood0.31
3/8" Plywood0.47
1/2" Plywood0.63
5/8" Plywood0.77
3/4" Plywood0.94
Fiberboard2.64
Fiberglass4.00
Extruded Polystyrene5.00
Foil-Faced Polyisocyanurate7.20

INTERIOR FINISH

Gypsum Board (drywall 1/2")0.45
Gypsum Board (drywall 5/8")0.56
Paneling (3/8")0.47

GLASS

Single Pane0.91
- With Storm2.00
Double Pane
- 3/16" air space1.61
- 1/4" air space1.69
- 1/2" air space2.04
- 3/4" air space2.38
- 1/2" with Low-E3.13
Triple Pane
- 1/4" air space2.56
- 1/2" air space3.23

DOORS

Wood Hollow Core Flush (1 3/4")2.17
Solid Core Flush (1 3/4")3.03
Metal (2" with urethane)15.00


Table Source: ColoradoEnergy.org