There are several key requirements for building a masonry wall with good thermal and airtightness
performance and with the ability to control water leakage. The following construction requirements
are from the CMHC Seminar on brick veneer wall systems:
Mortar joints must be completely filled and tooled on the exterior face to be resistant
to rain penetration.
Mortar joints on the backup wall must also be filled and properly tooled since it also
Mortar droppings within the cavity must be minimized and weepholes must be kept
Securely anchor undamaged flashing to backup wall with properly lapped joints and
extend sufficiently to clear the exterior face of veneer.
Shelf angles must not tilt backwards. Sealant and backer rod must be installed
below shelf angles to prevent water from entering the top of the veneer and cavity.
Ties must not provide a path to carry water to the backup wall. Seal perforations of
exterior components of backup wall caused by ties.
Ensure that cavity insulation is fastened tightly to the backup wall.
Avoid gaps between insulation units and gaps between wall insulation and insulation
in other wall components.
Maintain continuity in the insulation and air barrier systems, including intersections
with other building components.
Follow manufacturer's instructions for specified sealants
Do not substitute any materials without approval of designer.
Protect work in progress from damage due to weather and construction activities by