How can I prevent ice dams on my Bloomington home?
Air sealing comes first. Gaps around recessed lights, plumbing stacks, bathroom fans, and the attic access are major heat-loss points. Sealing them stops warm indoor air from reaching the roof deck, which is the single most effective long-term fix.
Insulation depth and ventilation work together. Adequate insulation slows heat flow, while baffles at the eaves keep soffit vents open so cold air washes the underside of the roof. Together they hold the deck near outdoor temperature and prevent the melt-refreeze cycle.
Short-term measures help during a hard winter. Raking snow off the lower three to four feet of roof reduces the meltwater available to freeze at the eaves, and heated cables can manage chronic problem spots while you plan permanent insulation and ventilation improvements.
