Preparing your roof for winter — a real checklist

Missouri and Illinois roofs take a specific kind of beating: not the sustained deep cold of the far north, but repeated freeze-thaw cycling, where water melts into a gap during the day and expands as ice overnight. That cycle, dozens of times a winter, is what turns a hairline crack in a pipe boot into a ceiling stain by February. Here is the checklist we would work through on our own homes.

From the ground

1. Sight every roof plane with binoculars or a zoomed phone camera. Look for missing, lifted, curled or creased shingles — anything not lying flat is an entry point once ice gets under it.
2. Check every flashing detail you can see: chimney, walls, valleys, skylights, vent pipes. Flashing failures cause the majority of leaks and winter is their season.
3. Look at the pipe boots. The rubber collars around plumbing vents crack with age and UV, and a cracked boot is one of the most common winter leaks we chase.
4. Sight the ridge and slopes for sag. Anything already sagging will carry snow load poorly. See how to fix a sagging roof.
5. Inspect fascia and soffit for soft spots, peeling paint and gaps. See soffits and fascia.

Gutters and drainage

1. Clean them after the leaves are down, not in the middle of the drop. A gutter full of wet leaves becomes a block of ice and a lever hanging on your fascia.
2. Flush every downspout and confirm it runs clear, then confirm extensions carry water several feet from the foundation.
3. Check pitch and hangers. Sagging runs hold standing water, which freezes first.
4. Note granule sediment. Heavy black grit means the shingle surface is wearing or was hail-damaged — worth an inspection before winter, not after. See gutters and your roof.

In the attic — the part that actually prevents ice dams

Ice dams are an attic problem that shows up on the roof. Warm air escaping into the attic melts snow on the upper roof; the meltwater runs down to the cold overhang and refreezes into a dam; water then backs up under the shingles. Fixing the roof surface does nothing about the cause.

1. Verify intake ventilation is open. Look toward the eaves: if insulation is jammed into them, install baffles so air can enter. Blocked soffit vents are the single most common cause of a warm attic.
2. Confirm exhaust is working at the ridge or roof vents, and that intake and exhaust are reasonably balanced.
3. Check insulation depth and coverage, especially over the exterior wall plates where it is usually thin.
4. Seal air leaks from the house into the attic: can lights, bath fan housings, plumbing chases, the attic hatch. Air sealing beats adding insulation over an unsealed ceiling.
5. Make sure bath and kitchen fans vent outside, not into the attic. Venting moist air into a cold attic is a reliable way to grow mold and soak decking.
6. Look for existing water staining and rusted nail tips, both signs you already have a problem to address before the cold sets in.

Around the house

• Trim branches back from the roof. Ice-loaded limbs break, and limbs that rub abrade shingles all winter.
• Have the chimney inspected if you burn — the flashing and the crown are both roof-adjacent failure points.
• Buy a roof rake now, not during the storm. Pulling snow off the lower few feet of roof from the ground is the safe way to limit ice dam formation.
• Know where your water shutoff is, and keep our number somewhere you can find it at 2 a.m.

Fix these before the first freeze, not after

Any active leak, any cracked pipe boot, any lifted or missing shingles, any compromised flashing, any sag, and any blocked attic ventilation. All of these get dramatically more expensive once water is freezing inside them, and winter repairs are harder to schedule, harder to execute in cold weather and harder to do well.

If something does go wrong mid-winter, we answer the phone. Read what to do when a roof leaks during a winter storm, and know that emergency service runs 24 hours a day, holidays included. A pre-winter inspection is free, takes under an hour, and comes with photographs of everything we find.

Questions about your own roof? A John Beal Roofing inspection is free and comes with photographs you keep. Call 1-800-564-6232 — answered 24 hours a day — or book online.

Frequently asked questions

When should I have my roof inspected for winter?

Early to mid fall, after the leaves are down but before the first hard freeze. That timing leaves room to schedule repairs in workable weather, which matters because cold-weather roof repairs are harder to do well.

How do I prevent ice dams on my roof?

Keep the roof deck cold and uniform in temperature: open the soffit intake vents, balance them with ridge or roof exhaust, air-seal leaks from the house into the attic, and maintain adequate insulation. Clean gutters and raking snow off the lower roof help, but ventilation and air sealing are the real fix.

Should I clean my gutters before winter?

Yes, and it is the single highest-value item on the list. Debris-packed gutters freeze solid, add significant weight to the fascia, and worsen ice damming by holding meltwater at the eave.

Can a roof be repaired in winter?

Yes, and we do it year round, including emergency work. It is harder: asphalt shingles are more brittle in the cold and sealant strips need warmth to bond fully, so planned work is better done in fall when conditions allow a proper installation.

What are the warning signs my roof will not make it through winter?

Widespread curling or missing shingles, any existing leak or ceiling stain, a visible sag, cracked pipe boots, damaged flashing, heavy granule loss in the gutters, and attic signs like frost, mold or rusted nail tips.