Drywall Framing System
#30 Corner Master™ Expansion/Contraction Control Joint (Double-V) is designed to provide stress relief at plaster wall inside corner instersections. The Double-V expansion joint absorbs movement due to expansion and contraction of plaster walls and controls cracking. #30 Corner Master™ has expanded flanges preformed at 90° for a flush fit at inside corners. This expansion/control joint is offered in ground heights of 1/2", 3/4" and 7/8", which aids plaster keying and results in a clean, straight finish. Manufactured from galvanized steel for corrosion protection.