Water Coming Through the Ceiling in Winter? What to Do First

Written by Chandler Steffy, President/Owner at Superstorm Roofing & Siding · Published November 10, 2026

A water stain spreading across the ceiling in January is one of the most stressful things a homeowner can see. The good news is that a few quick steps can limit the damage while you figure out where the water is coming from. Here’s what to do first, and what usually causes winter leaks in Iowa homes.

First 30 minutes: protect the inside of your home

1. Move what you can. Get furniture, electronics and rugs out of the way and put a bucket or tote under the drip.
2. Relieve a bulging ceiling. If the drywall is sagging with trapped water, put a bucket underneath and poke a small hole at the lowest point with a screwdriver. A controlled drain is better than a ceiling collapse.
3. Watch for electrical hazards. If water is near a light fixture, outlet or ceiling fan, turn off that circuit at the breaker.
4. Take photos and video. Document the stain, the drip and anything damaged before you clean up. If this turns into an insurance claim, you’ll want this record.
5. Keep receipts. The Iowa Insurance Division advises saving receipts for things like tarps you buy to prevent further damage, so you may be reimbursed later.

Don’t climb on an icy roof

It’s tempting to go up and look, but a snow- or ice-covered roof is one of the most dangerous places you can stand in winter. Look from the ground and from the attic instead, and leave the roof to a crew with fall protection.

What usually causes winter leaks

Ice dams

Heat escaping from the living space warms the roof deck and melts snow. The meltwater runs down to the colder eaves, refreezes, and builds a ridge of ice. Water then backs up behind that ridge and works under the shingles. Big icicles and thick ice along the gutters are the giveaway. Our guide on removing and preventing ice dams covers this in detail.

Attic condensation

Sometimes the “leak” isn’t coming through the roof at all. Warm, moist air from bathrooms, kitchens or the living space reaches a cold attic and condenses or freezes on the underside of the roof deck. On the first warm day, that frost melts and drips. Poor ventilation and gaps in the attic insulation are the usual causes. See how roof ventilation works.

Flashing and penetrations

Chimneys, plumbing vents, skylights and roof-to-wall joints are sealed with flashing and boots. Cracked pipe boots and worn flashing let water in year-round, but freeze-thaw cycles make small gaps bigger.

Storm damage that wasn’t caught

Hail bruises and wind-lifted shingles from summer and fall storms often don’t leak right away. Snow load and meltwater find those weak spots in winter.

When to call a roofer

Call as soon as you see active dripping, a growing stain, or ice ridges along your eaves. A good roofer will check the attic as well as the roof, so you fix the actual cause instead of patching the wrong spot. If the roof needs more than a repair, it can still be replaced in winter when done to the manufacturer’s cold weather instructions.

We’ll find the source

Superstorm inspections include the roof, flashing, ventilation and attic, with drone photos and a written report you keep. Schedule a free roof inspection or learn about our roof repair services.