MBCI’s Double-Lok Hi-Thermal Clip holds the company’s Double-Lok panels 2 inches above the purlin or joist. This space will allow for 6 inches of fiberglass insulation with a 1-inch-thick thermal spacer or up to 12 inches of fiberglass insulation without a thermal spacer. The resulting assembly will enable to roof achieve a U-Value of 0.065 without bowing the roof panels or creating seaming issues.