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First step is to remove back of the wall
(inside portion of brick or block) slightly larger than
actual sleeve. Once back brick is removed rest of the
hole is cut from outside utilizing small scaffolding
platform that is securely hanged on the window sill. |
Precise cut is made with diamond blade
saw only 1/4 of an inch larger than actual sleeve. This
will minimize any possible leaks. After remaining brick
is removed we build a new cement base with specific
pitch as required by the building or building architect.
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| At this
stage primer is applied to make stronger bonding between
bituthene membrane and cement base. In this case we also
installed angle iron wrapped in bithutene membrane on
the top of the hole to reinforce window-sill above.
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Bithutene
membrane is applied to base and sides further preventing
any possible leaks. |
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finally the sleeve is installed and cemented inside the
new wall opening. We also carefully caulk all around
outside of the sleeve to make sure no water penetrates
inside the building. |
View of
the finished installation with architectural louver
installed flush with outside wall. |
