Thermal properties for roof and wall construction details

From ASHRAE (1989), with permission

Code

Description

Thickness and thermal properties

Thickness,
feet

Thermal conductivity,
Btu/hr·ft·°F

Density,
lb/ft3

Specific heat,
Btu/lb·°F

Thermal resistance,
Btu/hr·ft2·°F

Mass,
lb/ft2

A0

Outside surface resistance

0

0

0

0

0.33

0

A1

1 in. Stucco

0.0833

0.4

116

0.2

0.21

9.7

A2

4 in. Face brick

0.333

0.77

125

0.22

0.43

41.7

A3

Steel siding

0.005

26

480

0.1

0

2.4

A4

1/2 in. Slag

0.0417

0.11

70

0.4

0.38

2.2

A5

Outside surface resistance

0

0

0

0

0.33

0

A6

Finish

0.0417

0.24

78

0.26

0.17

3.3

A7

4 in. Facebrick

0.333

0.77

125

0.22

0.43

41.7

B1

Air space resistance

0

0

0

0

0.91

0

B2

1 in. Insulation

0.083

0.025

2

0.2

3.33

0.2

B3

2 in. Insulation

0.167

0.025

2

0.2

6.67

0.3

B4

3 in. Insulation

0.25

0.025

2

0.2

10

0.5

B5

1 in. Insulation

0.0833

0.025

5.7

0.2

3.33

0.5

B6

2 in. Insulation

0.167

0.025

5.7

0.2

6.67

1

B7

1 in. Wood

0.0833

0.07

37

0.6

1.19

3.1

Code

Description

Thickness and thermal properties

Thickness,
feet

Thermal conductivity,
Btu/hr·ft·°F

Density,
lb/ft3

Specific heat,
Btu/lb·°F

Thermal resistance,
Btu/hr·ft2·°F

Mass,
lb/ft2

B8

2.5 in. Wood

0.2083

0.07

37

0.6

2.98

7.7

B9

4 in. Wood

0.333

0.07

37

0.6

4.76

12.3

B10

2 in. Wood

0.167

0.07

37

0.6

2.39

6.2

B11

3 in. Wood

0.25

0.07

37

0.6

3.57

9.3

B12

3 in. Insulation

0.25

0.025

5.7

0.2

10

1.4

B13

4 in. Insulation

0.333

0.025

5.7

0.2

13.33

1.9

B14

5 in. Insulation

0.417

0.025

5.7

0.2

16.67

2.4

B15

6 in. Insulation

0.5

0.025

5.7

0.2

20

2.9

B16

0.15 in. Insulation

0.0126

0.025

5.7

0.2

0.5

0.1

B17

0.3 in. Insulation

0.0252

0.025

5.7

0.2

1

0.1

B18

0.45 in. Insulation

0.0379

0.025

5.7

0.2

1.5

0.2

B19

0.61 in. Insulation

0.0505

0.025

5.7

0.2

2

0.3

B20

0.76 in. Insulation

0.0631

0.025

5.7

0.2

2.5

0.4

B21

1.36 in. Insulation

0.1136

0.025

5.7

0.2

4.5

0.6

B22

1.67 in. Insulation

0.1388

0.025

5.7

0.2

5.5

0.8

Code

Description

Thickness and thermal properties

Thickness,
feet

Thermal conductivity,
Btu/hr·ft·°F

Density,
lb/ft3

Specific heat,
Btu/lb·°F

Thermal resistance,
Btu/hr·ft2·°F

Mass,
lb/ft2

B23

2.42 in. Insulation

0.2019

0.025

5.7

0.2

8

1.2

B24

2.73 in. Insulation

0.2272

0.025

5.7

0.2

9

1.3

B25

3.33 in. Insulation

0.2777

0.025

5.7

0.2

11

1.6

B26

3.64 in. Insulation

0.3029

0.025

5.7

0.2

12

1.7

B27

4.54 in. Insulation

0.3786

0.025

5.7

0.2

15

2.2

C1

4 in. Clay tile

0.333

0.33

70

0.2

1.01

23.3

C2

4 in. L.W. concrete block

0.333

0.22

38

0.2

1.51

12.7

C3

4 in. H.W. concrete block

0.333

0.47

61

0.2

0.71

20.3

C4

4 in. Common brick

0.333

0.42

120

0.2

0.79

40

C5

4 in. H.W. concrete

0.333

1

140

0.2

0.33

46.7

C6

8 in. Clay tile

0.667

0.33

70

0.2

2

46.7

C7

8 in. L.W. concrete block

0.667

0.33

38

0.2

2

25.3

C8

8 in. H.W. concrete block

0.667

0.6

61

0.2

1.11

40.7

C9

8 in. Common brick

0.667

0.42

120

0.2

1.59

80

C10

8 in. H.W. concrete

0.667

1

140

0.2

0.67

93.4

Code

Description

Thickness and thermal properties

Thickness,
feet

Thermal conductivity,
Btu/hr·ft·°F

Density,
lb/ft3

Specific heat,
Btu/lb·°F

Thermal resistance,
Btu/hr·ft2·°F

Mass,
lb/ft2

C11

12 in. H.W. concrete

1

1

140

0.2

1

140

C12

2 in. H.W. concrete

0.167

1

140

0.2

0.17

23.3

C13

6 in. H.W. concrete

0.5

1

140

0.2

0.5

70

C14

4 in. L.W. concrete

0.333

0.1

40

0.2

3.33

13.3

C15

6 in. L.W. concrete

0.5

0.1

40

0.2

5

20

C16

8 in. L.W. concrete

0.667

0.1

40

0.2

6.67

26.7

C17

8 in. L.W. filled conc. blk.

0.667

0.08

18

0.2

8.34

12

C18

8 in. H.W. filled conc. blk.

0.667

0.34

53

0.2

1.96

35.4

C19

12 in. L.W. filled conc. blk.

1

0.08

19

0.2

12.5

19

C20

12 in. H.W. filled conc. blk.

1

0.39

56

0.2

2.56

56

E0

Inside surface resistance

0

0

0

0

0.69

0

E1

3/4 in. Plaster or gypsum

0.0625

0.0925

100

0.2

0.675

6.3

E2

1/2 in. Slag or stone

0.0417

0.83

55

0.4

0.05

2.3

E3

3/8 in. Felt and membrane

0.0313

0.11

70

0.4

0.29

2.2

E4

Ceiling air space

0

0

0

0

1

0

E5

Acoustic tile

0.0625

0.035

30

0.2

1.79

1.9