HYGROTHERMAL SNAPSHOT Exterior Cellular Foam Glass Insulation on Framed Wall RATING International Falls, Minnesota | 93.23°N 48.33°W | Elev. 1183 ft | ‐6 UTC ASSEMBLY COMPONENTS Fiber Cement, Painted 2 Rainscreen Air Space  3 CLIMATE NORMALS PARAMETERS 1 0.315 in 0.75 in Cellular Foam Glass Panel 8 in P
Pass Test Duration 2 Yrs Temp. Daily Max / Min Interior Moisture Low RH Daily Max / Min Interior Temperature 48.7°F / 26.1°F 82% / 62% Rainfall 69.8°F ± 1.8°F 24.22 in Snowfall Housewrap WRB 0.008 in Interior Humidity 5 Plywood 0.625 in Orientation / Inclination 6 Wall Cavity (Air) 3.5 in Exterior Coating ‐ Wind Direction 7 Interior Gypsum Board 0.492 in Interior Coating ‐ Station Air Pressure 28.7 in 8 Interior Paint & Primer 0.003 in Rain Exposure / Deposition 10,221 Heating Degree Days (65 F) 1% Cooling Degree Days (65 F) Yes / 120 Rain Penetration () Rainscreen / ACH Temperature
192 Modeled Climate Data Relative Humidity
Water Content
WUFI Temperature
SUMMER ASSEMBLY PROFILE
 Exterior Interior 
12
10
100
10
100
8
80
8
80
6
60
1
4
40
5
2
3
7
20
Water Content (lb/ft3)
60
6
RH (%) Temperature (F)
120
12
Water Content (lb/ft3)
300° 1 / 0.5 Water Content
7.9 mph 0
0
0.0
0.4
1.1
2.3
5.4
8.2
9.2
4
1
40
5
3
2
7
20
0
0
9.8 11.4 13.3
120
RH (%) Temperature (F)
1
WINTER ASSEMBLY PROFILE
 Exterior Interior 
Wind Speed N/ 90° 1
Relative Humidity
45% ± 15% 71 in 4 0.0
0.4
1.1
Assembly Thickness (Inches)
2.3
5.4
8.2
9.2
9.8 11.4 13.3
Assembly Thickness (Inches)
MOLD AND CORROSION RISKS AT PREDICTED RH AND SURFACE TEMPERATURES (YEAR 2)
Plywood Exterior
Plywood Interior
ASHRAE 30‐Day Criteria
95% RH; 41F
Very High ≥90% RH; 41°F
High
≥80% RH; 41°F
Moderate
≥75% RH; 41°F
Low
<75% RH; 41°F
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PERFORMANCE RATINGS 1
Ratings are based on ASHRAE Standard 160 . Resistant materials are evaluated based on hourly 30‐day running averages at ≥95% RH, 41°F. P = Pass; Criteria met C = Conditional; Criteria compliance is uncertain F = Fail; Criteria not met for a 30‐day running average CF = Critical Fail; Criteria not met at multiple 30‐day running averages ABOUT THIS REPORT These findings are offered for informational purposes only and are not intended as a comprehensive hygrothermal analysis. Design considerations should not rely on this report as the sole means for predicting assembly performance. Uncertainties and limitations 2
inherent to hygrothermal modeling apply to these findings . For more information, visit our website at www.built‐environments.com. 1. ASHRAE Standard 160: Criteria for Moisture‐Control Design Analysis in Buildings. 2. ASTM MNL 18: Moisture Control in Buildings. Hygrothermal Snapshot No. 13 | Jan 2014 | ©2014 Built Environments, Inc. | www.built‐environments.com