If all conditions meet, an ice dam may be formed along the edges of your roof, causing the melting snow to back up underneath the shingles and eventually into your home, which in turn causes moisture and that can lead to the growth of mold and mildew
Ice dams can form when the following conditions exist:
Heat that naturally rises toward the peak of an attic and accumulates creates a warmer air in the higher portion of the attic, which cause snow to melt and flow down the roof.
With the lower portion of the roof being well below freezing temperatures, the flowing melted snow refreezes again at that point, forming an ice dam
The pool of melted snow, however, is made possible when a heavy snow cover accumulates on the roof, acting as a layer of insulation that prevent heat loss through the roof sheathing.
Installing a balanced intake/exhaust attic ventillation, and adequate attic insulation, in addition to installing a waterproofing shingle underlayment will help create a uniform temperature in your attic and therefore, reduce the risk of an ice dam formation.
If, however, you see a bigger cover of snow with a display of sparkling icicles along the edge of your roof, like in the picture above, please give us a call or fill out the request form and we will prevent this from turning into a bigger problem.
6-300 Hamel Avenue, Winnipeg, Manitoba, R2H 0K9