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Ice dam
Meaning
Noun
●
an
obstruction
to the
flow
of a
river
caused
by the
flow
of a
glacier
across its course
●
In Spring:
an
obstruction
to the
flow
of a
river
caused
by the
concatenation
of
surface
ice
into a
ridge
that
rises above
and
sinks
below the surface
causing
a
blockage
,
occurring
frequently
during
spring
breakup
season
●
In Roofing & Winter:
a
mass
of
ice
formed
at the
transition
from a
warm
to a
cold
roof
surface
,
frequently
formed
by
refreezing
meltwater
at the
overhang
of a
steep
roof
,
causing
ice
and water to
back up
under
roofing
materials.
●
In Roofing:
Ellipsis of
ice dam
membrane
. A
plastic
protection
membrane
applied
to
rooves
to
prevent
ice
buildup
from
backing water
through
roof
sheeting
Sourced from
Wiktionary
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