Typically when you get to the edge of a roof, wood blocking must be installed that matches the height of the insulation that is butted up against it. The wood allows for metal to be fastened to it since metal cannot be fastened to insulation board. This creates a need for large amounts of chemically treated lumber and the process is labor intensive. Echo Edge is seven times faster to install (see video comparison below). Echo Edge eliminates the need for lumber because metal can be fastened directly onto Echo Edge. Made from the same material as Echo Block, but more narrow, Echo Edge has a screw pull out strength of 459.38 LBF and a Miami Dade NOA of -300 psf. Approved for all expansion joint blocking as well.