Cedar Valley Winter Home Prep: Stop Ice Dams, Frozen Pipes and Furnace Trouble

Winter in the Cedar Valley doesn’t ease in. One week you’re raking leaves in Cedar Falls, and the next the wind is coming across the open fields around Hudson and Dunkerton with snow behind it. Most of the expensive winter problems we hear about from Waterloo-area homeowners — frozen pipes, ice dams, a furnace that quits on the coldest night of the year — start as small things that could have been handled in an afternoon in November.

Here’s a practical checklist for getting an Iowa home ready before the deep cold settles in.

Start in the attic, not on the roof

Ice dams are the long ridges of ice that build up along the eaves after a snowfall. They form when heat leaking out of the living space warms the roof deck, melts the snow from underneath, and the water refreezes when it reaches the colder overhang. The trapped water can back up under shingles and show up as stained ceilings or wet insulation.

The fix usually isn’t on the roof at all. It’s in the attic:

• Air sealing. Gaps around recessed lights, bath fans, plumbing stacks and the attic hatch let warm, moist air into the attic. Sealing those first makes every inch of insulation work harder.
• Insulation depth. Many older homes in Waterloo’s established neighborhoods were built when a few inches of insulation was normal. If you can see the tops of your ceiling joists, you probably have room to add more.
• Ventilation. Soffit and ridge vents keep the roof deck cold so snow melts evenly instead of in one spot. Make sure soffit vents aren’t blocked by insulation.

If you’ve had ice dams before, ask a roofer or insulation contractor to look at the attic before you spend money on heat cables or a new roof.

Protect your pipes before the first hard freeze

Frozen pipes tend to happen in the same places: outside walls, crawl spaces, unheated garages and the plumbing under a kitchen sink on an exterior wall.

• Disconnect garden hoses and shut off and drain outdoor spigots, unless you have frost-free sillcocks.
• Insulate exposed pipes in basements, crawl spaces and garages with foam sleeves.
• Seal drafts where pipes and wires pass through the rim joist in the basement.
• Know where your main water shutoff is, and make sure everyone in the house can find it.
• On very cold nights, open cabinet doors under sinks on outside walls so warm air can reach the pipes.

If you’re heading out of town during a cold stretch, keep the thermostat set at a safe temperature and ask someone to check on the house.

Give the furnace its fall checkup

A furnace that runs every day from November through March deserves an annual tune-up. A technician can check the burners, flame sensor, heat exchanger and blower and catch worn parts before they fail.

A few things you can do yourself:

• Replace the furnace filter and set a reminder to check it monthly through winter.
• Keep supply and return vents clear of furniture and rugs.
• Test your carbon monoxide and smoke alarms and replace batteries.
• Clear snow away from exterior furnace and water heater vents after storms, especially on high-efficiency units that vent out the side of the house.

If your system is getting old, winter is a good time to start researching replacements, before an emergency forces a rushed decision. Ask about high-efficiency furnaces and cold-climate heat pumps, and check with your utility for any current rebate programs.

Tighten up windows and doors

Drafty windows and doors make a house feel colder than the thermostat says. Check weatherstripping around exterior doors and the door from the garage, replace worn door sweeps, and caulk gaps around window trim. If you have single-pane windows or frames that are soft, cracked or fogged between the panes, it may be time to price replacements.

Don’t forget the outside

• Clean gutters once the leaves are down so meltwater can drain.
• Make sure downspouts carry water several feet away from the foundation.
• Trim branches that hang over the roof or power lines and could break under ice.
• Have shovels, ice melt and a roof rake ready before the first big storm.

This is general information, not professional advice. For gas appliances, electrical work or roof safety, use a qualified, licensed professional.

Bring your winter questions to the show

If your checklist turned up bigger projects — more insulation, a new furnace, replacement windows or a roof that’s near the end of its life — the Waterloo Home & Remodeling Show is a good place to sort them out. You can meet several local pros in one visit, compare quotes side by side and ask the questions you’d normally have to schedule separate appointments for. Bring photos of problem areas, a few measurements and your last few heating bills, and you’ll get much more useful answers.

See it in person at the Waterloo Home & Remodeling Show

January 22–24, 2027 · Waterloo Convention Center, 200 W 4th St, Waterloo · Free admission. Get free tickets and plan your visit.

Own a home improvement business?

Meet Cedar Valley homeowners face to face all weekend. Reserve your booth online at NationwideExpos.com or call (319) 666-HOME.