Effect
An ice
dam will likely form when the roof temperature hovers
near freezing. The warmer portions of the roof will
begin to melt snow allowing water to flow down to the
lower roof elevations. The snow melt will re-freeze
as it encounters the cooler portion of the roof, thus
forming an ice dam. The remaining water will be
trapped between the higher elevation snow pack and the
frozen run-off in the lower ice dam.
The
pooled water may begin to seep through tiny cracks in
the roof top. The water can penetrate into the
attic space, walls, ceilings and insulation of a
structure. This may result in excess moisture,
dampness, mold and mildew.
In
addition, damage may be seen as gutters and down spouts
are compromised under the weight of an ice
dam.
Prevention
-
Roof
top temperature regulation through quality and
appropriate attic insulation. This
will prevent the warm air of the common areas
from penetrating into the attic and heating the roof
top.
-
Proper seals for vents, chimneys and duct
work to eliminate hot/cold air ventilation
variables. The cooler the attic space, the
better!
-
Removal of a
heavy snow pack from a roof top.
It is not recommended
that a church employee or volunteer remove the
snow. We strongly encourage using a licensed and
insured roofing professional who is properly trained
and equipped to handle the slippery roof-top
conditions.