What is R-value?

• a measurement of insulation weight
  R-value is the measure of an insulating product's ability to block heat transfer. This measurement can help you choose the most efficient insulation, windows and doors for your home. The higher a product's R-value, the better it insulates.
• a measurement of reflectivity
  R-value is the measure of an insulating product's ability to block heat transfer. This measurement can help you choose the most efficient insulation, windows and doors for your home. The higher a product's R-value, the better it insulates.
• a measurement of insulating efficiency
  R-value is the measure of an insulating product's ability to block heat transfer. This measurement can help you choose the most efficient insulation, windows and doors for your home. The higher a product's R-value, the better it insulates.