High humidity levels in the winter, coupled with drastic temperature fluctuations, can lead to significant issues in attics. When humid air enters the attic through soffits, it can freeze on the underside of the roof deck, creating icicles over time. When temperatures warm up, the frost and ice melt, causing “attic rain” which can compromise the insulation’s R-value and can appear that your roof is leaking, also perpetuating the problem of frost buildup. Proper ventilation in the attic is key to prevent frost buildup, and having the right insulation can prevent hot, humid air from entering the attic. Additionally, bathroom fans that are not connected properly and vent into the attic can also cause substantial frost buildup. These issues are common, especially in areas with extreme temperature swings like Edmonton. At Sargeants Roofing, we conduct attic inspections to identify and educate homeowners on these issues and provide solutions. If you suspect you may have an issue with frost buildup in your attic, call us to schedule an inspection.