ASHRAE-90.1-2022- - Page 257
Extracted Content
Table A5.2.3.1 Assembly U-Factors for Mass Floors
Framing
Type
| Cavity Insulation R- Value: Rated (Effective Installed) | Overall U-Factor for Entire Base Floor Assembly | Col3 | Col4 | Col5 | Col6 | Col7 | Col8 | Col9 | Col10 | Col11 | Col12 | Col13 | Col14 | Col15 | Col16 | Col17 | Col18 | Col19 | Col20 | Col21 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cavity Insulation R- Value: Rated (Effective Installed) | Overall U-Factor for Entire Base Floor Assembly | **R-1.00 ** | **R-2.00 ** | **R-3.00 ** | **R-4.00 ** | **R-5.00 ** | **R-6.00 ** | **R-7.00 ** | **R-8.00 ** | **R-9.00 ** | **R-10.00 ** | **R-11.00 ** | **R-12.00 ** | **R-13.00 ** | **R-14.00 ** | **R-15.00 ** | **R-20.00 ** | **R-25.00 ** | **R-30.00 ** | **R-35.00 ** |
Concrete Floor with Rigid Foam
and Spacing
Width (Actual
Depth)
None (0.0) 0.322 0.243 0.196 0.164 0.141 0.123 0.110 0.099 0.090 0.083 0.076 0.071 0.066 0.062 0.058 0.055 0.043 0.036 0.030 0.026 0.023
Concrete Floor with Pinned Boards
| Col1 | R-4.2 (4.2) | 0.137 | 0.121 | 0.108 | 0.097 | 0.089 | 0.081 | 0.075 | 0.070 | 0.065 | 0.061 | 0.058 | 0.055 | 0.052 | 0.049 | 0.047 | 0.045 | 0.037 | 0.031 | 0.027 | 0.024 | 0.021 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R-6.3 (6.3) | 0.107 | 0.096 | 0.088 | 0.081 | 0.075 | 0.070 | 0.065 | 0.061 | 0.058 | 0.054 | 0.052 | 0.049 | 0.047 | 0.045 | 0.043 | 0.041 | 0.034 | 0.029 | 0.025 | 0.023 | 0.020 | |
| R-8.3 (8.3) | 0.087 | 0.080 | 0.074 | 0.069 | 0.065 | 0.061 | 0.057 | 0.054 | 0.051 | 0.049 | 0.047 | 0.045 | 0.043 | 0.041 | 0.039 | 0.038 | 0.032 | 0.027 | 0.024 | 0.022 | 0.019 | |
| R-10.4(10.4) | 0.074 | 0.069 | 0.064 | 0.060 | 0.057 | 0.054 | 0.051 | 0.049 | 0.046 | 0.044 | 0.042 | 0.041 | 0.039 | 0.038 | 0.036 | 0.035 | 0.030 | 0.026 | 0.023 | 0.021 | 0.019 | |
| R-12.5 (12.5) | 0.064 | 0.060 | 0.057 | 0.054 | 0.051 | 0.048 | 0.046 | 0.044 | 0.042 | 0.041 | 0.039 | 0.038 | 0.036 | 0.035 | 0.034 | 0.033 | 0.028 | 0.025 | 0.022 | 0.020 | 0.018 | |
| R-14.6 (14.6) | 0.056 | 0.053 | 0.051 | 0.048 | 0.046 | 0.044 | 0.042 | 0.040 | 0.039 | 0.037 | 0.036 | 0.035 | 0.034 | 0.033 | 0.032 | 0.031 | 0.027 | 0.023 | 0.021 | 0.019 | 0.017 | |
| R-16.7 (16.7) | 0.051 | 0.048 | 0.046 | 0.044 | 0.042 | 0.040 | 0.039 | 0.037 | 0.036 | 0.035 | 0.034 | 0.032 | 0.031 | 0.030 | 0.030 | 0.029 | 0.025 | 0.022 | 0.020 | 0.018 | 0.017 |
Concrete Floor with Spray-On Insulation
| 1 in. | R-4 (4.0) | 0.141 | 0.123 | 0.110 | 0.099 | 0.090 | 0.083 | 0.076 | 0.071 | 0.066 | 0.062 | 0.058 | 0.055 | 0.052 | 0.050 | 0.047 | 0.045 | 0.037 | 0.031 | 0.027 | 0.024 | 0.021 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 in. | R-8 (8.0) | 0.090 | 0.083 | 0.076 | 0.071 | 0.066 | 0.062 | 0.058 | 0.055 | 0.052 | 0.050 | 0.047 | 0.045 | 0.043 | 0.041 | 0.040 | 0.038 | 0.032 | 0.028 | 0.024 | 0.022 | 0.020 |
| 3 in. | R-12 (12.0) | 0.066 | 0.062 | 0.058 | 0.055 | 0.052 | 0.050 | 0.047 | 0.045 | 0.043 | 0.041 | 0.040 | 0.038 | 0.037 | 0.036 | 0.034 | 0.033 | 0.028 | 0.025 | 0.022 | 0.020 | 0.018 |
| 4 in. | R-16 (16.0) | 0.052 | 0.050 | 0.047 | 0.045 | 0.043 | 0.041 | 0.040 | 0.038 | 0.037 | 0.036 | 0.034 | 0.033 | 0.032 | 0.031 | 0.030 | 0.029 | 0.026 | 0.023 | 0.020 | 0.018 | 0.017 |
| 5 in. | R-20 (20.0) | 0.043 | 0.041 | 0.040 | 0.038 | 0.037 | 0.036 | 0.034 | 0.033 | 0.032 | 0.031 | 0.030 | 0.029 | 0.028 | 0.028 | 0.027 | 0.026 | 0.023 | 0.021 | 0.019 | 0.017 | 0.016 |
| 6 in. | R-24 (24.0) | 0.037 | 0.036 | 0.034 | 0.033 | 0.032 | 0.031 | 0.030 | 0.029 | 0.028 | 0.028 | 0.027 | 0.026 | 0.026 | 0.025 | 0.024 | 0.024 | 0.021 | 0.019 | 0.018 | 0.016 | 0.015 |