Why Ice Dams Are a Massachusetts Problem
If you own a home in Massachusetts, you have probably seen icicles hanging from the eaves and ridges of ice along the roof edge. Those are ice dams, and they are one of the most common causes of winter water damage in New England homes — leaking through ceilings, soaking insulation, and rotting roof decking.
What Actually Causes an Ice Dam
Ice dams form from a simple chain reaction:
- Heat escapes from the living space into the attic.
- That heat warms the roof deck, melting the snow on the upper roof.
- The meltwater runs down and refreezes at the cold eaves (which overhang the unheated exterior).
- The ice builds into a dam that traps more water behind it — and that water works its way under the shingles and into your home.
The root cause is almost always heat loss and poor attic ventilation — not the roof itself.
How to Prevent Ice Dams for Good
A new roof alone will not fix ice dams. The permanent fixes address heat and air:
- Air-seal the attic floor — stop warm air leaking up from the living space.
- Add insulation — bring the attic up to current code (R-49 in Massachusetts) to keep the roof deck cold.
- Improve ventilation — balanced soffit and ridge vents keep the underside of the deck the same temperature as the eaves.
- Ice-and-water shield — when re-roofing, we install a waterproof membrane along the eaves so any ice dam that does form cannot leak through.
I Already Have an Ice Dam — Now What?
Do not chip at it with a hammer or use salt that corrodes shingles and gutters. In an emergency, a roofing professional can steam the dam off safely. Then address the cause before next winter. RS Development Group inspects the roof, attic, and ventilation together — see our roofing services — so you get a permanent fix, not a yearly patch.
We solve ice dams every winter on homes from Lexington and Arlington to Worcester. If you are tired of the same leak every January, let us find the real cause.
