March 2025 - Ice Dams Are Not a Roofing Problem
WYSL/ Wise Home Energy Show
Jeff Flaherty does a deep dive on ice dams just as the season wraps up, covering exactly why they form, why cleaning your gutters won't stop them, and why the roofer on the local news is the wrong person to ask. He walks through the mechanics of vented versus unvented attics, why mixing exhaust vent types is a mistake most contractors make anyway, and why a ridge vent buried under two feet of snow probably isn't doing much. He also covers the two-foot slope homes where ventilation isn't even an option, the homeowner who went back to his roofer for insulation because the new roof warranty said so, and what delaminated plywood on the lower edge of your roof deck is actually telling you. Plus why a perfectly air sealed attic can still leave you with a dangerous snow load, what dovetail rafters have to do with ice formation, and the rare cases where a powered attic vent actually makes sense.
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