Masonry Magazine June 1980 Page. 22
The Wall
The space between the veneer and the backup should be grouted to the height of the flashing. Flashing should be securely fastened to the backup system and extend through the face of the brick veneer. Typical flashing details are shown in Figs. 4 and 5. Flashing should be carefully installed to prevent punctures or tears. Where several pieces of flashing are required to flash a section of the veneer, the ends of the flashing should be lapped and the joints properly sealed.
Lintels, Sills and Jambs
Typical construction details for lintels, sills, and jambs are shown in Fig. 5. The advantages of using reinforced brick lintels are: more efficient use of materials; built-in fireproofing; elimination of differential movement which may occur with steel lintels and brick veneer; and no required painting or other maintenance.
Eave Details
Two typical eave details are shown in Fig. 6. These are suggested design details for the area at the top of the veneer.
Movement Provisions
Bond Breaks. In areas where significant differential foundation movement may cause severe cracking in walls rigidly attached to the foundation, bond breaks will help to relieve the stresses caused by horizontal movements between the wall and the supporting foundation. Differential movement in excess of 4 in. per 15 ft (7 mm per 5m) is considered significant movement and must be considered in detailing.
Expansion Joints
Expansion joints are rarely required in residential construction; however, in some designs of commercial buildings, expansion joints will be required. Information on expansion joints is given in Technical Notes 18 Series. When calculating the placement of expansion joints, the maximum and minimum mean temperatures of the isolated brick wythe should be used rather than the mean wall temperature.
Horizontal Joint Reinforcement
Horizontal Joint Reinforcement. Masonry materials subject to initial shrinkage stresses, such as concrete masonry, require horizontal joint reinforcement for stability against such movement. Brick is not subject to initial shrinkage, therefore horizontal joint reinforcement is never required in brick masonry for this purpose. It may be beneficial to use limited amounts of horizontal joint reinforcement in brick veneer for added transverse strength or to increase the spacing between expansion joints. Single wire horizontal joint reinforcement may be used to add integrity to the veneer in such places as corners. When using horizontal joint reinforcement, it must be discontinuous at all movement joints.
Caulking and Sealants
Exterior caulking joints at the perimeter of exterior door and window frames should not be less than 14 in. (6 mm) nor more than in. (10 mm) wide, and should be cleaned for a depth of 4 in. (19 mm). These joints should be solidly filled with an elastic caulking compound or sealant forced into place with a pressure gun. All joints should be properly primed before placing.