Ice damming occurs as a result of a temperature difference under and
above the roof of a house or building. The warm air from inside the
house or building heats the roof and melts the snow above it. The melted
snow then re-freezes at unheated areas of the roof resulting in the
formation of icicles at areas like eaves troughs. As the snow above the
heated surface continues to melt further, it forms water pools on the
roof as the icicles prevent the water from draining outwards from the
roof. Eventually, the pool of water finds its way into your house
through sheathing, insulation and wall cavities.
Damages Caused by Ice Damming:
The formation of ice dams on the roof can cause different types of damages. Water that seeps into the house can damage ceilings, walls and cause structural damages. It may damage roof coverings as well. Dampness on ceilings and walls attract mould growth, which can cause further damage to your house. On the other hand, as more and more ice re-freezes on the gutter, pressure builds-up and can collapse the gutters, damaging the exterior structure of your house.- Structural Damage
- Gutter System Damage Ice damming damages the exterior of the house also. The increasing weight of snow and ice on the roof puts pressure on the gutter system resulting in its misalignment. As a result, the gutter system will no longer effectively drain off water from the roof. In extreme cases, part of the gutter system under the pressure of built-up ice can collapse as well.
- Growth of Mould
The water from ice dams flows under the shingles resulting in water
leaks. Water leaks damage ceilings, walls, floors and insulation. As the
leak gets severe, it causes wood rot and ends up as severe structural
damage.
Mould thrives on surfaces with dampness. Moist wood, wall paper and
ceilings are favourable surfaces for mould to germinate and grow, which
damages your house further. In short, ice damming badly affects the
structural integrity of your house.
Preventing Ice Damming:
Ice damming is preventable. Taking proper precautions will prevent ice damming and the damages resulting from it.
-
Proper Insulation
Heat from inside the house or building comes to the attic and warms up the roof. This is how ice dams start to form on the roof. Insulating the attic properly will minimize this heating process. -
Ensure Proper Ventilation
To avoid ice damming, the roof of your house needs to be vented at the peak and at the eaves. Cold air moves freely above the insulation in the attic or ceiling. This keeps the roof cold and prevents the snow from melting to ice dams. -
Snow and Ice Shield
Installing snow and ice shields beneath the shingles or on the top of the roof prevents water from routing its way into the interiors of your house. It is the protective feature of the shield that seals the attic and stands as a barrier to water making its way in.
In order to properly remove icicles, ice dams or snow that is
accumulated on your roof, it is best advised to contact a restoration
expert to avoid any further or possible damage from occurring. For more
information on how to best prevent ice damming or for a quote on the
installation of preventive measures, please contact your local Winmar Georgian Bay Muskoka at 1-888-656-6092.
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