SYSTEMS/MASONRY
Figure 4.2.20 shows another window jamb/wall connection (Brand and Turenne). In this detail the
window thermal break is in line with the wall insulation. To maintain continuity of the insulation
system, compressible foam insulation is applied behind the return bricks. This insulation also keeps
the air barrier above the dewpoint temperature under heating conditions. This insulation must be
held very close to the barrier to be effective.
ACCEPTABLE
Air barrier sealed to
Compressible foam
thermally broken
insulation continuous
window frame
with rigid wall insulation
Figure 4.2.20 Wall / Window Jamb (Brand)
PAGE 4.2-23
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