Plumb-Rite Patent # 6,293,066B1
Plumb-Rite is a T-shaped PVC product that assists in keeping vertical joints in precise alignment where control joints and expansion joints are used in a masonry wall. Plumb-Rite is rigid enough to keep a 3/8" vertical joint consistently straight. It is flexible enough -- with a special slotted stem -- to allow for expansion of the brick.
Plumb-Rite may be attached to wood, steel, and block back-ups with either nails, screws or mastic. When insulation is used in the cavity, foam board adhesive is simply applied to the back of the Plumb-Rite and adhered to the insulation.

• Fast and simple installation.
• Insures that vertical joint is uniform    where control joints and expansion    joints are used in masonry.
• Uniformity enhances appearance of    wall.
• Saves time and money. Once
  Plumb-Rite is installed, it isn't
  necessary to plumb joint again.   Increases job productivity.
• Replaces use of metal, boards, lines,   or other materials. Avoids pulling metal   or wood guides up the wall and risking
  quality workmanship.
• It isn't necessary to clean out the joint.   Instead, the trowel is run up the vertical   slot to insure movement for expansion   of brick.
• Not necessary to use experienced                                                      mason in control joint areas.
                                                   • Available in 10' lengths. May be saw                                                      cut at the job site.
                                                     Packed four pieces per box.