Preventing Ice Dams
Ice dams are the #1 winter roof problem in Colorado:
Ice dams are ridges of ice that form at the eaves when snow melts on warm roof areas and refreezes at cold edges. They force water under shingles, causing leaks.
Heat escaping into the attic warms the roof deck, melting snow. Water refreezes at the cold eaves, creating a dam. Inadequate ventilation and insulation are primary causes.
Improve attic ventilation and insulation. Keep the roof deck cold and even. Install heating cables at the eaves as a temporary measure.
Snow Removal
Proper snow removal protects your roof:
Remove snow when accumulation exceeds 12 inches. Heavy snow adds structural load and increases ice dam risk.
Use a roof rake from the ground. Never climb onto a snowy roof. Roof rakes extend 10-20 feet and safely remove snow from the eaves.
Do not use hot water, salt, or calcium chloride on your roof. These methods can damage shingles and cause additional problems.
Attic Insulation and Ventilation
Proper attic conditions prevent winter damage:
R-38 to R-60 insulation is recommended for Colorado attics. Proper insulation keeps heat from escaping into the attic and warming the roof deck.
Balanced intake (soffit) and exhaust (ridge) ventilation keeps the attic cold. Cold attics prevent snow melt and ice dam formation.
Seal gaps and penetrations in the attic floor. Air leaks from living spaces warm the attic and cause ice dams.
Winter Maintenance
Regular maintenance prevents winter damage:
Clean gutters before winter. Clogged gutters cause ice dams and water backup under shingles.
Inspect your roof before winter. Repair damaged shingles, flashing, and sealant. Address problems before snow arrives.
Check the attic for water stains, mold, or daylight through the roof deck. Address issues immediately.
Winter Emergency Response
What to do if your roof is damaged in winter:
Place buckets under leaks, move furniture and electronics, and call a professional. Do not climb onto a snowy roof.
If you suspect structural damage, evacuate the area and call emergency services. Sagging ceilings or walls indicate serious problems.
Use tarps or roofing cement for temporary repairs. Keep receipts for insurance claims.
Frequently Asked Questions
How do I prevent ice dams on my roof?
Improve attic insulation (R-38 to R-60), ensure balanced ventilation (soffit intake + ridge exhaust), and seal air leaks in the attic floor. These measures keep the roof deck cold and prevent snow melt that causes ice dams.
How much snow can my roof handle?
Most residential roofs are designed for 20-30 pounds per square foot of snow load. Heavy wet snow can exceed this. If snow accumulation exceeds 12 inches, consider safe removal using a roof rake from the ground.
Can I walk on my roof in winter?
It is generally unsafe to walk on a snowy or icy roof. Snow makes surfaces slippery, and frozen shingles are brittle and can crack. Use a roof rake from the ground instead.
What should I do if my roof leaks in winter?
Place buckets under leaks, move furniture and electronics, and call a professional roofing contractor. Do not climb onto a snowy roof. Temporary tarp repairs can be made from the ground.