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[ Insulation Basics ] [ R-Value Drift ] [ Thermal Breaks ] [ Whole Wall R-Value ] [ Moisture Barriers ] [ Air Barriers ] [ Vapor Retarders ] [ Ice Dams ] [ Ventilation Basics ] [ Vented vs. Unvented Roofs ] [ Noise Reducing Barriers ] [ Theory vs. Practice ] [ Sustainability ] Combined cavity and framing wall values
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Framing member & spacing
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Insulation types
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Nominal Cavity R-value
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Wood framed system
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Steel Framed System
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2 x 4 16" o.c.
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Fiberglass batt
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11
|
9.16
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5.5
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|
13
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10.36
|
5.98
|
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15
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11.47
|
6.45
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FOAM-TECH Closed cell
foam
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24.5
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15.68
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12.25
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FOAM-TECH Open cell foam
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12.6
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10.13
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5.42
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2 x 4 24" o.c.
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Fiberglass batt
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11
|
9.7
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6.6
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13
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11.11
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7.15
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|
15
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12.44
|
7.8
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FOAM-TECH Closed cell
foam
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24.5
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17.82
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14.7
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FOAM-TECH Open cell foam
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12.6
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10.84
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6.55
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2 x 6 16" o.c.
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Fiberglass batt
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19
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15.45
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7.03
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|
21
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16.61
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7.35
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FOAM-TECH Closed cell
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38.5
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24.64
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14.25
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FOAM-TECH Open cell
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19.8
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15.92
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7.33
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|
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2 x 6 24" o.c.
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Fiberglass batt
|
19
|
16.47
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8.55
|
|
21
|
17.86
|
9.03
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FOAM-TECH Closed cell
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38.5
|
28
|
17.33
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FOAM-TECH Open cell
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19.8
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15.92
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8.91
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