The second
topic deals with the issues we have faced.
When the
roof was deemed complete by the contractor, the engineer did a leak test by
blocking the drains and then flooding the roof with 4 inches of water.
Absolutely nothing leaked at the time so it seemed like we had a good result.
However, as
the weather turned colder, damage started to appear. So what happened?
There is a
gooseneck on the upper roof that has been problematic for years so it was
theorized that that might be the cause. The thought was that water can
infiltrate the gooseneck if the wind blows in the wrong direction due to the
angle of the gooseneck. The gooseneck was replaced and then adjusted to fit the
duct size which was much smaller. Unfortunately, the problem persists. This is yet to be solved with confidence. The current
hypothesis is that it may also be condensation from a nearby obsolete
ventilation duct but this is yet to be confirmed. This is an enigma because it
does not leak when it rains but sometimes drips after weeks of dry weather.
The upper
roof was originally designed with no drains and no slope. It was a problem when
the roof was asphalt and gravel but should not affect the membrane roof.
There
was accumulation of water on the lower roof 2 times this spring because protection
for the drain was blocked. After cleaning the drain protection the water
eliminates as it should.
There was a
side of the roof membrane that came unglued and was repaired.
Based on
these issues, the contractor has committed to fixing the interior damage that
he is responsible for.
The next
chapter discusses the major issue which has been condensation on the inside of
the skylights in cold weather.
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