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What is Long Term Thermal Resistance (LTTR)? Click here to find out.
| Long-Term Thermal Resistance (LTTR)* |
| GEMINI PRE-CUT CRICKETS |
| MARKING |
THICKNESS |
SLOPE PER |
AVERAGE |
| |
in |
mm |
foot |
meter |
LTTR Value |
RSI |
| X |
0.5"-1.0" |
12-38 |
1/4" |
6 |
6 |
1.06 |
| Y |
1.5"-2.5" |
38-63 |
1/4" |
6 |
12.1 |
2.13 |
| Q |
0.5"-2.5" |
12-63 |
1/2" |
12 |
9.0 |
1.58 |
| 2" |
2.0" |
50 |
N/A |
N/A |
12.1 |
2.13 |
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* Long-term thermal resistance values were determined in accordance with CAN/ULC-S770. All test samples were third-party selected and tested by an accredited material testing laboratory. The R-value for .5 in. perlite (1.39) was provided by ASHRAE Handbook, Fundamentals. The R-value of .55 for 7/16 OSB was provided by APA-The Engineered Wood Association, which cited ASHRAE Handbook, Fundamentals. The R-value for .25 in. glass-mat gypsum board (.28 R-value) was provided by the glass-mat gypsum board manufacturer. | |
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