Water stain on the ceiling in winter

A water stain on the ceiling in winter usually means meltwater from an ice dam is getting in, though flashing around a chimney or vent can leak too. Stop the water, dry the area right away to prevent mold, and wait until it is dry before repairing the ceiling.

Updated

Fixes it now

Winter Roof Leak Repair

A ceiling stain in winter is often meltwater from an ice dam, not a hole in the roof. Stop the water first, then dry the area right away; University of Minnesota Extension warns that moisture from ice dams can lead to mold, and says to hold interior repairs until ceilings and walls are dry.

Ice Dam Removal

An ice dam is a ridge of ice at the roof edge that traps melting snow, which can back up under the shingles into walls and ceilings. If water is already coming in, the Minnesota Department of Commerce says to hire a removal service that uses steam, and to avoid chipping, chemicals or open heat.

Fixes the cause

Chimney Flashing & Masonry Repair

A leak near the chimney usually comes from the flashing, the metal that seals the joint between chimney and roof, or from cracked masonry and a worn chimney cap. Repair reseals or replaces the flashing and fixes the brick and mortar. In winter, check that it is not ice backing up instead.

What to do today

  1. Check the roof edge above the stain for ice.
  2. Catch drips and move things out of the way.
  3. Dry wet areas as soon as you can; University of Minnesota Extension warns that ice dam moisture can lead to mold.
  4. Hold off on painting or patching until ceilings and walls are dry.

When it is an emergency

A sagging ceiling or water near light fixtures is an emergency. Turn off power to that area and call for help.

Sources

Frequently asked questions

Should I paint over the stain now?

Wait. University of Minnesota Extension advises against repairing interior damage until ceilings and walls are dry, and says to fix the heat loss behind an ice dam at the same time, or the damage returns.

How to get a quote

Pick a business from the list and use the contact form or phone number on its own website. Asking two or three lets you compare. Cold Home Guide does not take quote requests.