High Energy Efficiency
The level of thermal performance the envelope provides is directly related to three distinct components which are the R-Value, thermal mass and air tightness. All of these will have a direct effect on the energy efficiency of a home or building. Missing just one of these three characteristics reduces the building performance dramatically. Reward insulating concrete forms (ICF) address all three of the thermal performance properties, which can translate into immense energy savings for the owner.
ICF Thermal Performance Components
R-Value is a measure of the capacity of insulation to impede heat flow- the higher the value the better. Reward’s insulating concrete forms (iForm) have a static R-Value of 22; this includes EPS foam, concrete and basic drywall finish. Using the Boost-R Panel can increase the R-Value of the ICF well beyond R30. Also it is important to note ICFs serves as 100% continuous insulation, meaning there are no gaps in the wall unlike batt-insulated walls.
Thermal mass is concept in building design that describes how the mass of the building reduces temperature fluctuations. For example, when outside temperatures are fluctuating throughout the day, a large thermal mass within the insulated portion of a house can serve to “flatten out” the daily temperature fluctuations. Insulating concrete forms all have concrete in the core which give the wall an incredible amount of mass. Concrete cores size range from as narrow as 4 in. up to 12 inches.
Air tightness is measuring how tightly the building envelope is sealed, preventing unwanted air movement in and out of the home or building via opening like windows, doors and service penetrations as well as through porous wall materials. Because insulating concrete forms are a solid monolithic wall system there is virtually NO air movement through the wall. ICFs allow the designer or builder to focus more on the flashing around openings and giving better control to the interior environment.
ICF Technology combines the three components of thermal performance by providing high R-value (EPS insulation), great thermal mass (concrete) and low to zero air infiltration (air tightness). No other wall assembly can achieve this level of energy efficiency without additional steps being taken.
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