Self-Furred V grooved expanded metal lath is manufactured with 'V'-grooves in the lath in lieu of standard 'dimples.' These 5 grooves provide the necessary 1/4' furring off the sheathing's surface to allow for proper embedment and keying of the scratch coat on all types of walls. This lath comes with Grade D asphalt paper backing pre applied. A saturated black asphalt paper complying with Federal Spec. No. UUB-790A Style 2 Grade D. Manufactured with a 3" lap for weathered application.