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This is a case of the shoemaker's son, and if it
can happen to me it can happen to you.
Not too long ago we did an upgrade on the
enclosure of our home which included both spray foam and blown
in cellulose insulation. We also did a number of other major upgrades
which required several trades to enter the attic and interior
spaces for inspection
and work.
Amongst the contractors we hired, was one of the oldest and top brand building
performance firms with a nation wide reputation for their
knowledge in building science and skills at sealing and
insulating existing buildings...these guys are pro's (still are)
and they like me, missed the bathroom fan buried in the existing
vermiculite insulation.[1] Plus (and this is the part that irks
me more than my own epic failure) during the placement of the
new insulation the applicator either ignorantly or knowingly covered it up
again.
Regardless, all of us so called
"experts" forgot in this case to look above and below the water line to see
the whole picture, translation: the fan was
venting (albeit poorly) into the insulation. Good news for us is
the room is used infrequently and in Calgary the attic is dryer
than a bag of desiccant for most of the year.
Following is a series of photos showing the
before and after which serves as a reminder to me (slap to
forehead) and a warning
to you that when doing anything above the ceiling, become an
Anableps and always look
above and below the water line.
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