<p style="box-sizing: border-box; margin: 0px 0px 10px; color: #666666; font-family: Roboto, sans-serif; font-size: 13px;"><span style="box-sizing: border-box; font-size: 14pt;">The R-value is a measure of thermal resistance, indicating how well a material resists the conductive flow of heat. A higher R-value means better insulating effectiveness.</span>

<p style="box-sizing: border-box; margin: 0px 0px 10px; color: #666666; font-family: Roboto, sans-serif; font-size: 13px;"><span style="box-sizing: border-box; font-size: 14pt;">There are two ways to measure R-value: nominal and effective. Here's how the two concepts differ and why they both matter.</span>

<p style="box-sizing: border-box; margin: 0px 0px 10px; color: #666666; font-family: Roboto, sans-serif; font-size: 13px;"><span style="box-sizing: border-box; font-size: 14pt;"><span style="box-sizing: border-box; font-weight: 900;">Nominal R-Value</span></span>

<p style="box-sizing: border-box; margin: 0px 0px 10px; color: #666666; font-family: Roboto, sans-serif; font-size: 13px;"><span style="box-sizing: border-box; font-size: 14pt;">The nominal R-value represents the stated insulation value of a specific material under steady-state, laboratory conditions. This is the R-value that is generally printed on the insulation packaging and is used in marketing and sales of insulation products.</span>

<p style="box-sizing: border-box; margin: 0px 0px 10px; color: #666666; font-family: Roboto, sans-serif; font-size: 13px;"><span style="box-sizing: border-box; font-size: 14pt;">An architect would use the nominal R-values in initial design phases to compare different insulating materials and to calculate an initial estimate of the overall thermal resistance of various building components.</span>

<span style="box-sizing: border-box; font-size: 14pt;">Read More:MAA Seminar for architects</span>