What is an Ice Dam and What to do if You Have One


They're pretty and kids love to play with them. But if you've got giant icicles hanging from your roof, it may mean trouble.Ice dams are caused from a buildup of frozen precipitation along your home's roof line. It happens when snow on your roof begins melting from the warmer air in your attic. As it melts and runs down to unheated areas over the eaves of your roof, it drips and begins to refreeze on and around your roof's edge or gutter system, creating long icicles. This frozen barrier is also slowly backing up any remaining melting precipitation as it grows, sending water right under your roof shingles. And that can mean costly damage to the interior of your home. 


There are a few things you can do as a homeowner to reduce the risk of ice dams. IBHS has a list of great recommendations. We can tell you from decades of providing home insurance in Virginia, a little prevention goes a long way. The most important preventative measure you can take is to thoroughly clean your gutters, or have them cleaned by a professional at the end of fall and beginning of spring. 


What do to if you already have an ice dam

If you have an ice dam forming along your home's roof line, it's important to take action soon to prevent or limit damage to your home.

WARNING: This is a slippery, tedious and very dangerous job!

Resolving an ice dam is best left to a certified roofer or gutter specialist in your area, especially if you're unable to access your roof without a ladder. They have specialized steaming equipment to safely and quickly resolve ice dams and the experience to fix extenuating issues.

For experienced DIYers: If you're able to easily and safely reach your roof, you can take these steps to help remove the ice dam:

  1. Pull the snow behind the ice dam down off the roof using an aluminum roof rake, ideally removing 3-4 feet of snow behind the ice. Other tools can damage shingles.

  2. Next, apply calcium chloride as a melting product you can throw on. Note that this chemical can damage plants if exposed to in large amounts. There are also environmentally friendly heating cables made specifically for the melting needed along your roof line.

  3. Be patient! Avoid using any sharp, hard metal tools or chipping away at the ice. It may seem like a faster solution, but it's bound to damage your roofing, soffit and parts of your gutter system.

  4. It may take some time, but once you are able to see your gutters, make sure they are free of debris and able to carry melting precipitation down your gutter spouts and away from your home's foundation.

Even after successfully removing ice dams, it's important to have your roof professionally inspected to check for hidden damage. You also need to determine why the ice dam formed in the first place. If your gutters are clear, it may be as simple and inexpensive as adding insulation or identifying unwanted heat sources in your attic. This is another good reason to just hire a specialist to address the whole problem. You'll have peace of mind that the problem is fixed and won't happen again.



We hope you don't experience ice dams this winter, but if you do, remember it's important to address it quickly. And if you have a claim, give us call!  We're here to help get your home repaired and protected for the next big snow.

Learn more about homeowners insurance in Virginia >

NNINS Blog Home >