R-Values
Acousta-Wal R-Values
R-Values of concrete masonry walls are correlated to concrete density, since thermal conductivity of
concrete increases with increasing density. The following tables list a range of R-values for each density.
Contact Northfield for specific block densities.
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Table 2: R-Values For 6 in. (152 mm) Concrete Masonry Walls, hr.-ft2.oF/Btua
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Construction
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Density of
concrete |
Cores empty
|
Cores filled with b:
|
||||||||
|
Loose-fill insulation
|
Polyurethane
foamed insulation |
Solid grouted
|
|||||||||
|
Perlite
|
Vermiculite
|
||||||||||
|
pcf
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
|
|
Exposed
block, both sides |
85
|
2.2-2.5
|
2.4
|
4.8-6.1
|
5.3
|
4.5-5.6
|
5.0
|
5.2-7.0
|
5.9
|
1.6-1.8
|
1.7
|
|
95 |
2.1-2.4
|
2.2
|
4.1-5.4
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4.6
|
3.9-5.0
|
4.3
|
4.4-6.1
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5.0
|
1.5-1.7
|
1.6
|
|
|
105
|
2.0-2.2
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2.1
|
3.5-4.8
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4.0
|
3.3-4.5
|
3.8
|
3.7-5.2
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4.3
|
1.4-1.6
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1.5
|
|
|
115
|
1.8-2.1
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2.0
|
3.0-4.2
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3.4
|
2.9-4.0
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3.3
|
3.1-4.5
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3.6
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1.4-1.5
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1.4
|
|
|
125
|
1.7-2.0
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1.8
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2.5-3.7
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3.0
|
2.5-3.5
|
2.9
|
2.6-3.9
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3.1
|
1.3-1.5
|
1.4
|
|
|
135
|
1.6-1.9
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1.7
|
2.2-3.2
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2.6
|
2.2-3.1
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2.5
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2.2-3.4
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2.7
|
1.3-1.4
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1.3
|
|
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Table 3: R-Values For 8 in. (203 mm) Concrete Masonry Walls, hr.-ft2.oF/Btua
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|
Construction
|
Density of
concrete |
Cores empty
|
Cores filled with b:
|
||||||||
|
Loose-fill insulation
|
Polyurethane
foamed insulation |
Solid grouted
|
|||||||||
|
Perlite
|
Vermiculite
|
||||||||||
|
pcf
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
|
|
Exposed
block, both sides |
85
|
2.4-2.7
|
2.5
|
6.3-8.2
|
7.1
|
5.9-7.5
|
6.6
|
6.9-9.4
|
8.0
|
1.9-2.1
|
2.0
|
|
95 |
2.3-2.6
|
2.4
|
5.3-7.2
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6.1
|
5.0-6.7
|
5.7
|
5.8-8.1
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6.7
|
1.7-2.0
|
1.8
|
|
|
105
|
2.1-2.4
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2.2
|
4.5-6.3
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5.2
|
4.3-5.9
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4.9
|
4.8-7.0
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5.6
|
1.6-1.9
|
1.7
|
|
|
115
|
2.0-2.3
|
2.1
|
3.8-5.5
|
4.4
|
3.7-5.2
|
4.3
|
4.0-6.0
|
4.7
|
1.5-1.8
|
1.6
|
|
|
125
|
1.9-2.2
|
2.0
|
3.2-4.8
|
3.8
|
3.1-4.6
|
3.7
|
3.3-5.1
|
4.0
|
1.5-1.7
|
1.5
|
|
|
135
|
1.7-2.1
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1.9
|
2.7-4.2
|
3.3
|
2.7-4.0
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3.2
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2.8-4.4
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3.4
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1.4-1.6
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1.5
|
|
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Table 4: R-Values For 10 in. (254 mm) Concrete Masonry Walls, hr.-ft2.oF/Btua
|
|||||||||||
|
Construction
|
Density of
concrete |
Cores empty
|
Cores filled with b:
|
||||||||
|
Loose-fill insulation
|
Polyurethane
foamed insulation |
Solid grouted
|
|||||||||
|
Perlite
|
Vermiculite
|
||||||||||
|
pcf
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
|
|
Exposed
block, both sides |
85
|
2.5-2.9
|
2.7
|
7.5-9.9
|
8.5
|
7.0-9.1
|
7.9
|
8.2-11.3
|
9.5
|
2.1-2.4
|
2.2
|
|
95 |
2.4-2.7
|
2.5
|
6.3-8.7
|
7.2
|
6.0-8.0
|
6.8
|
6.7-9.7
|
7.9
|
1.9-2.2
|
2.0
|
|
|
105
|
2.2-2.5
|
2.3
|
5.2-7.5
|
6.1
|
5.0-7.0
|
5.8
|
5.5-8.2
|
6.6
|
1.8-2.1
|
1.9
|
|
|
115
|
2.1-2.4
|
2.2
|
4.4-6.5
|
5.2
|
4.2-6.2
|
5.0
|
4.6-7.0
|
5.5
|
1.7-2.0
|
1.8
|
|
|
125
|
1.9-2.3
|
2.1
|
3.7-5.6
|
4.4
|
3.6-5.4
|
4.3
|
3.8-6.0
|
4.6
|
1.6-1.9
|
1.7
|
|
|
135
|
1.8-2.1
|
2.0
|
3.1-4.9
|
3.7
|
3.0-4.7
|
3.6
|
3.2-5.1
|
3.9
|
1.5-1.8
|
1.6
|
|
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Table 5: R-Values For 12 in. (305 mm) Concrete Masonry Walls, hr.-ft2.oF/Btua
|
|||||||||||
|
Construction
|
Density of
concrete |
Cores empty
|
Cores filled with b:
|
||||||||
|
Loose-fill insulation
|
Polyurethane
foamed insulation |
Solid grouted
|
|||||||||
|
Perlite
|
Vermiculite
|
||||||||||
|
pcf
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
range
|
mid
|
|
|
Exposed
block, both sides |
85
|
2.6-3.0
|
2.8
|
9.1-12.1
|
10.3
|
8.5-11.0
|
9.6
|
10.0-13.8
|
11.5
|
2.3-2.6
|
2.4
|
|
95 |
2.4-2.8
|
2.6
|
7.6-10.5
|
8.8
|
7.2-9.7
|
8.2
|
8.2-11.8
|
9.6
|
2.1-2.4
|
2.3
|
|
|
105
|
2.3-2.6
|
2.4
|
6.3-9.1
|
7.4
|
6.0-8.5
|
7.0
|
6.7-10.0
|
8.0
|
2.0-2.3
|
2.1
|
|
|
115
|
2.1-2.5
|
2.3
|
5.2-7.9
|
6.2
|
5.1-7.4
|
6.0
|
5.5-8.5
|
6.6
|
1.9-2.2
|
2.0
|
|
|
125
|
2.0-2.3
|
2.2
|
4.4-6.8
|
5.3
|
4.2-6.5
|
5.1
|
4.5-7.2
|
5.5
|
1.8-2.0
|
1.9
|
|
|
135
|
1.9-2.2
|
2.0
|
3.6-5.8
|
4.4
|
3.6-5.6
|
4.3
|
3.7-6.1
|
4.6
|
1.7-1.9
|
1.8
|
|
Additional R-values can be achieved with factory-installed expanded polystyrene, such as Korfil or Icon. Consult manufacturer for added R-values.
Information based on data published by the National Concrete Masonry Association. See NCMA TEK Note 6-2A,
