The HIGH-R Radiant Double Bubble Solution is composed of a double bubble insulation that is white poly on the finished side and reflective on the back side. After attaching the HIGH-R Quick Clip to the purlin, the double bubble is secured in place with the HIGH-R plastic cap. This solution provides the same white, bright appearance and provides an R-value of approximately R-15 in heat flow down situations. When used on the walls the effective r-values are a lesser value. Best fit would be use in semi climate controlled spaces in warm climate zones to slow the heat from penetrating the structure.