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A measure of the capacity of a material, such as insulation, to impede heat flow, with increasing values indicating a greater capacity. Also called R-factor.

[r(esistance) value.]


(ˈɑrˌvæl yu)

a measure of the resistance of an insulating or building material to heat flow, expressed as R-11, R-20, and so on; the higher the number, the greater the resistance to heat flow. Compare U-value.
[1945–50; R, symbol for resistance]
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Exterior storm windows, because they create a dead space over your primary windows, increase the insulation value of the entire window opening, not just the glass pane area.
Its high insulation value eliminates the need for energy for heating and cooling.
In addition to time and construction cost savings, tiltwall construction produces a building shell with fewer points of penetration, resulting in less possibility of moisture intrusion and higher insulation value.
As with all earthen building systems, CEB and rammed earth walls have little inherent insulation value.
In order to get an impression of the effect of using different manikins for the testing, data obtained on the individual manikins are presented in relation to the mean insulation value over all manikins for that ensemble (following the basic concept behind Bland Altman plots) used for comparing measurements from different instruments (lacking a gold standard).
Glue is a latex-based adhesive specifically designed for bonding polystyrene foam to itself - permanently joining foam boards to the substrate without compromising the insulation value of the foam.
The company's key focus in the Middle East is the engineering, manufacturing, and supply of cellular glass insulation, which provides superior long term insulation value and fire protection for sophisticated processes such as the gas processing, petrochemical, and refining businesses.
Poor insulation value leads to high heat gain or heat loss which in turn leads to higher energy consumption and costs due to poor thermal efficiency.
When this happens the insulation gets wet and the panel loses its insulation value.
2(1), where minimum R-value requirements per climate zone are found, mass watts require the lowest insulation value, primarily due to the effective performance combination of mass with insulation to dampen the diurnal impact on the building mechanical systems.
Thermic is primarily engaged in the design and assembly of URTVs, which are climatised delivery vehicles with decreased weight and enhanced strength, insulation value and temperature control compared to current climatised trucks.
ResQ's twill and yarn construction traps air in the fabric, which increases the insulation value of the fabric.