Replacing wood nailers at the building perimeter with DERBI-Eliminailer-T increases the structural integrity of the roof perimeter, significantly reduces the risk of failure and helps protect the entire roof system from costly damages and blow-off. 3” DERBI-Eliminailer-T replaces two wood nailers and allows 3” of polyiso and ½” cover board or up to 3.5” of Polyiso. Available in 2.5” and 5.5” flange widths.