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
Materials	Per Inch	Thickness
Insulation
Fiberglass Batt	3.15 - 4.30
Fiberglass Blown (attic)	2.20 - 4.30
Fiberglass Blown (wall)	3.70 - 4.30
Rock Wool Batt	3.14 - 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
Vermiculite	2.13
Rigid Fiberglass	4.00
Expanded Polystyrene (Beadboard)	4.00
Extruded Polystyrene	5.00
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 Concrete	0.08
Brick 4" common		0.80
Brick 4" face		0.44
Soft Wood Lumber	1.25
- 2" Nominal (1 1/2")		1.88
- 2x4 Nominal (3 1/2")		4.38
- 2x6 Nominal (5 1/2")		6.88
Cedar Logs & Lumber	1.33
Sheathing
1/4" Plywood		0.31
3/8" Plywood		0.47
1/2" Plywood		0.63
5/8" Plywood		0.77
3/4" Plywood		0.94
Fiberboard	2.64
Fiberglass	4.00
Extruded Polystyrene	5.00
Foil-Faced Polyisocyanurate	7.20
Interior Finish
Gypsum Board (drywall 1/2")		0.45
Gypsum Board (drywall 5/8")		0.56
Paneling (3/8")		0.47
Glass
Single Pane		0.91
Single Pane with Storm		2.00
Double Pane
- 3/16" air space		1.61
- 1/4" air space		1.69
- 1/2" air space		2.04
- 3/4" air space		2.38
- 1/2" with Low-E		3.13
Triple Pane
- 1/4" air space		2.56
- 1/2" air space		3.23
Doors
Wood Hollow Core Flush (1 3/4")		2.17
Solid Core Flush (1 3/4")		3.03
Metal (2" with urethane)		15.00