Weifa weep screed is designed to allow moisture to escape from behind stucco and plaster walls, preventing damage and promoting proper drainage. To install, attach the weep screed along the base of the wall, with the weep holes facing downward. Ensure that the weep screed is level and properly aligned with the foundation. Fasten the weep screed using appropriate fasteners, and then apply the stucco or plaster mix, making sure to leave the weep holes unobstructed for effective drainage.