Newer and more energy-efficient homes can be more likely to have ice build-up in attics
http://www.cbc.ca/news/canada/calgary/calgary-alberta-attic-rain-home-house-1.3933782
Newer and more energy-efficient homes can be more likely to have ice build-up in attics
http://www.cbc.ca/news/canada/calgary/calgary-alberta-attic-rain-home-house-1.3933782