An ice dam is a ridge of ice that forms at the edge of a roof and prevents melting snow from draining. As water backs up behind the dam, it can leak through the roof and cause damage to walls, ceilings, insulation and other areas.
How do ice dams form?
Ice dams are formed by an interaction between snow cover, outside temperatures, and heat lost through the roof. Specifically, there must be snow on the roof, warm portions of the upper roof (warmer than 32° F), and cold portions of the lower roof (at freezing or below). Melted snow from the warmer areas will refreeze when it flows down to the colder portions, forming an ice dam.
Although the primary contributor to snow melting is heat loss from the building's interior, solar radiation can also provide sufficient heat to melt snow on a roof. For example, in southern Canada, enough sunlight can be transmitted through 6 inches (150 mm) of snow cover on a clear and sunny day to cause melting at the roof's surface even when the outside temperature is 14° F (-10° C), with an attic temperature of 23° F (-5° C).
Gutters do not cause ice dams to form, contrary to popular belief.
Gutters do, however, help concentrate ice from the dam in a vulnerable area, where parts of the house can peel away under the weight of the ice and come crashing to the ground.
Problems Associated with Ice Dams
Ice dams are problematic because they force water to leak from the roof into the building envelope. This may lead to:
In summary, ice dams are caused by inadequate attic insulation, but homeowners can take certain preventative measures to ensure that they are rare.
by Nick Gromicko
Home Maintenance Tips In Greater Missoula Montana. Area, Home Inspection Solutions Missoula MT, Certified Inspectors
Bob Ruby - Home Inspection Solutions Missoula MT. 406-646-6182 , email@example.com
All Agent Agent Checklist Air Quality Alarm Ants Appraisal As Is Asphalt Attic Access Automatic Opener Basement Bees Beneficial Insects Better Home Inspection Bob Ruby Bowing Bricks Bush Cabin Carbon-Monoxide Detectors Carbon Monoxide Poisoning Carpenter Ants Carpenter Bees Checklist Check List Child Chimney Client Discounts Common Defects Concrete Tiles Contract Contractors DaySpring Deck Defensible Space Diagram Dianne Keast Disclosure Don Hester Door Download Down Payment Assistance Down Payment Gift Down Payment Grant Downspout Drainage Dryer Dryer Vent Maintenance Dual Agent Duct Work Egress Emergency Release Handle Energy Savings Erosion Escapre Exclusive Deals Exhaust Duct Exterior Exterior Cladding Falls Fast Sale FHA FHA Appraisal FHA/HUD Financing Find Inspector Fire Fire Extinguisher Firefighters Fire Hazards Fire Safety Fix Fixer Upper Fix Up Flat Roof Flooding Foundation Foundation Cracks Freeze-thaw Freezing Frozen Pipes FSBO Garage Door Get Pdf Get Read For Inspection Get Ready Gift Card Gifts Glue Grading Grants Grass Gutters Health Heating Cost Home Home Buyer Homebuyers Home Inspection Home Inspection Check List Home Inspection Solutions Home Loan Home Maintenance HomeNow Home Owner Home Seller Horizontal Bulging House Housing Trends How To Fix Up How To Plant How To Sell Fast HUD HVAC Ice Dam Improper Drainage Injury Insects Insulation InterNACHI James Quarello Landscaping Leaks Listing Loans Low Slope Roof Lumber Maintenance Mark Springer Masonry Cracks Metal Roofing Minimum Property Requirement’s (MPR’s) Missoula Missoula Five Valleys Chapter Missoula Home Inspection Mitigation Moisture Damage Mold Mold Clean Up Mold Damage Montana Montana Home Inspector Montana Restoration Mortar Deterioration. Move In Certified™ Move-In Certified™ Move In Inspection Move-in Ready Moving Mpemba Effect MPR's Natural Disaster Open House Kit Pdf Pests Photo-Electric Eye Physics Planting Plumbing Pollinators Polyvinyl Chloride Pre-Inspected Pre- Inspected Pre-listing Inspection Prepare Prepare For Inspection Prevent Preventing Cracks Prevention Pull-Down Stairs Radon Radon Test Railings Rain Real Estate Agent Refreshing A Stale Listing Repair Rep[airs Replace Roof Restoration Reversal Test Roof Roof Covering Roof-Covering Roofing Roofing Membranes Roof Inspection Roof Maintenance Roof Penetrations Root Barier Roots Safety Sealant Seller's Inspection Sell Faster Selling A Home Septic Shinggles Shrub Siding Simple Things Slope Smoke Alarm Smoke Alarm Types Snow Sodium-silicate Sources Of Carbon Monoxide Spalling Spores Spring Stairs Sugru Sump Pump Sweeping Tell Ants From Termites Termites Tips For Home Inspection Tools Trees Types Of Roof Covering Underlayments USDA VA Vegetation Venting Vents Vertical Bulging Vinyl Siding Wall Water Water Damage Water Intrusion Waterproofing Water Supply WDO Wenatchee Home Inspections Wild Fire Windows Winter Winterization Wood Wood Destroying Insects Wood Shakes
Missoula Home Inspections, Home Inspection Solutions, Locally Owned, Home Inspections, Home Buyer's Pre-Closing Inspections, Seller's Move In Certification Inspections, Yearly Maintenance Inspections.
InterNACHI is the world’s leading home inspector association and education provider, offering inspector-related Continuing Education online and video courses that have earned more than 1,200 governmental approvals and accreditations. InterNACHI-Certified Professional Inspectors® follow a comprehensive Standards of Practice and a strict Code of Ethics to ensure that their clients receive the best and most professional service possible.
FREE tips and Information., InterNACHI Trained and Certified (The International Association of Certified Home Inspectors).
Serving the greater Missoula Montana area., Bitterroot, Sapphire, Garnet, Rattlesnake & Mission Valleys,, Lolo, French Town, Arlee, Ronan, St. Ignatius., Bob Ruby, Dianne Keast
Copy Right 2014