CALL KENT KNOX FOR A FREE ESTIMATE. (416) 788-5357 - WE ARE OPEN EVENINGS & WEEKENDS

Ice Dams

Knox Insulation & Roofing specialists can remove and resolve ice dam problems and through sufficient insulation and ventilation prevent this troublesome issue from arising again in the future.

Common Winter Ice Dams

Under normal winter conditions, many houses in Canada form ice on the edge of sloped roofs or over part of flat roofs.

This is very different from freezing rain. It is caused by heat from the attic melting the bottom of the snow on the roof. When outside temperatures are just below freezing (0 to - 10°C), water flows down the roof under the snow and freezes when it reaches an unheated portion of the roof. This can create an ice dam on the lower edge of a pitched roof. Water can then back up under the shingles and into the roof space.

The first line of defense against ice dams is to reduce the attic temperature by stopping air leaks from the house below and adding sufficient insulation to the attic floor. Heating cables and other de-icing techniques are a last resort to minimize ice build-up and prevent water damage.

Contact us today for remedy and preventive solutions