WHOLE WALL THERMAL STUDY PROVES BUILDING WITH INSULATED CONCRETE FORMS CAN ACHIEVE UP TO 60% ANNUAL ENERGY SAVINGS FOR HOMEOWNERS
Studies undertaken at CLEB Laboratories in Varennes, Quebec, subjected two specimen walls to a month long period of study. One wall was constructed to a current code compliant R20 Insulated Wood Frame Cavity Wall with typical drywall and exterior vinyl siding finishes applied. The other wall used a standard 6″ core ICF wall with two layers of Type II EPS foam each approximately 2 1/2″ in nominal thickness and the same exact code compliant finishes. The reported results comparing the two wall assemblies prove the ICF assembly took nearly 324 hours to reach steady state performance under an exterior air temperature of -35 degrees Celsius, whereas the wood framed wall reached steady state within 60 hours of the start of the test.Steady state is the point at which the amount of heat being delivered to condition the interior space was exactly equal to the rate of heat transmission that was going through the wall.
These studies have clearly illustrated when comparing the amount of energy required to maintain both walls at steady state over this same 324 hour period, the wood frame wall consumes 149% more energy than the ICF wall. Even after both walls attained steady state under the test conditions, the ICF wall consumed 58% less energy than the wood framed wall specimen to maintain temperature.
WHAT DOES THIS MEAN FOR CONSUMERS? Consider two typical 2,000 square foot wall area homes – one constructed in wood frame to permitted code minimums, the other constructed to the same wall area using ICF technology and subjecting them to the same test condition. In terms of average kWH value for all of North America, this study proves that during the most extreme cold conditions an ICF wall could end up saving between $100 and $180 per month in equivalent electrical consumption over any traditionally constructed wood frame wall.
ICFS are the sustainable future in building construction.