Ten winterizing tasks ranked by what it costs you to skip them, with time, cost, and DIY difficulty for each. Covers pipe insulation, air sealing, heating service, gutters, and detectors, plus a one-day priority list.
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If you only have one weekend to winterize your home, do these three things first: insulate the pipes in unheated spaces, seal the air leaks around doors and windows, (learn more about how to hire a contractor: the complete guide to finding, vetting, and paying a pro (2026)) (learn more about best boiler installation and repair companies of 2026: brands, costs, and how to hire) (learn more about best home ev charger installation companies of 2026) (learn more about best storm door installation companies of 2026: 7 options compared) (learn more about best whole-home humidifier installation options of 2026: brands and services compared) and get the heating system serviced. Those three cover the two failures that cost homeowners the most — a burst pipe (learn more about pest control services in dallas: complete guide) and a furnace that quits on the coldest night. We ranked ten winterizing tasks by cost of failure, not by how easy they are, so you know what to do first if you run out of time. Air leaks alone account for 25% to 40% of the energy used to heat and cool a typical home, and sealing plus insulating saves an average of 15% on heating and cooling costs (ENERGY STAR).
Most of this list is a Saturday and a trip to the hardware store. Two items are worth calling a pro for, and we say which.
| Criteria | Weight | Why It Matters |
|---|---|---|
| Cost if it fails | High | A burst pipe is a five-figure repair. A drafty window is a higher bill. Those are not the same problem. |
| Likelihood of failure | High | Common failures beat rare ones, even when the rare one is worse. |
| Cost and effort to fix now | Medium | A $15 fix that prevents $10,000 of damage ranks above a $600 fix that saves $80 a year. |
| Whether you can do it yourself | Medium | Tasks a homeowner can finish safely in an afternoon get done. Tasks that need a lift often do not. |
Sources: ENERGY STAR seal-and-insulate guidance, U.S. Department of Energy air-sealing materials, and Insurance Institute for Business & Home Safety (IBHS) freeze-prevention recommendations. Last updated: September 8, 2026.
Time: 2–3 hours | Cost: $20–$60 | DIY: Yes
Foam pipe sleeves on any water line running through a crawl space, garage, attic, or exterior wall are the cheapest insurance in this whole list. IBHS specifically recommends wrapping pipes and faucets in unheated areas. A burst pipe does not just cost the plumbing repair — it soaks drywall, flooring, and everything stored below, which is why these claims routinely run into five figures.
Every homeowner in a climate that hits freezing, but especially anyone with a crawl space, an unheated garage with plumbing, or a home that sits empty for stretches in winter. If you travel in winter, pair this with keeping the thermostat no lower than 55°F.
Time: 1–2 hours | Cost: $100–$200 | DIY: Call a pro
A furnace or boiler tune-up before the first cold snap catches the failing igniter, the cracked heat exchanger, and the clogged flue while a technician can still get to you same week. In January, that same call is an emergency rate and a two-day wait in a cold home.
Anyone with a system older than eight years, and anyone who has not had it looked at in two seasons. If you heat with oil or propane, book the tune-up and the delivery schedule at the same time.
Time: 3–4 hours | Cost: $30–$80 | DIY: Yes
Weatherstripping and caulk are the highest-return dollars you will spend on the heating bill. Better weatherstripping can cut air leakage by 25% to 40%, and sealing along with attic insulation saves an average of 15% on heating and cooling. Run your hand around door frames and window sashes on a windy day — you will find the gaps without any equipment.
Older homes and anyone with a room that never gets warm. If the glass itself is cold to the touch and there is condensation between panes, sealing will not fix it — that is a window replacement conversation.
Time: 2–4 hours | Cost: $0–$250 | DIY: With caution
Clogged gutters hold water, that water freezes, and the resulting ice dam pushes meltwater backward under the shingles and into the ceiling. Clearing leaves in late fall is the whole fix. Extend downspouts at least four feet from the foundation so meltwater does not pool where it can freeze and heave.
Homes with trees overhead. If you are not steady on a ladder or the roof is above one story, hire it — the cost of the service is far below the cost of a fall.
Time: 30 minutes | Cost: $0–$15 | DIY: Yes
Close the interior shutoff valve for each hose bib, then open the outside faucet to drain the line. Disconnect and store garden hoses — a hose left attached traps water in the spigot, which freezes and splits the pipe inside the wall.
Everyone. This is the single most-skipped item on the list and one of the most common winter plumbing calls.
Time: 10 minutes | Cost: $0 | DIY: Yes
Flip the small switch on the fan housing so the blades turn clockwise, then run them on low. That pushes the warm air pooled at the ceiling back down along the walls instead of blowing cool air on you.
Homes with vaulted ceilings, lofts, or open stairwells where heat collects overhead.
Time: 5 minutes | Cost: $10–$25 | DIY: Yes
A loaded filter starves the blower, which makes the system run longer and work harder for the same warmth. Change it at the start of the season and check it monthly while the heat is running.
Everyone with forced-air heat, especially homes with pets or ongoing renovation dust.
Time: Half a day | Cost: $400–$1,800 | DIY: Sometimes
Heat rises and leaves through the attic first. If you can see the tops of the floor joists, you are under-insulated. This is the biggest-ticket item here, and it pairs with air sealing — sealing the leaks first, then insulating, is what produces the ENERGY STAR 15% figure.
Homes built before 1990 and anyone with visible joists in the attic. Skip it this year if the roof is near replacement — do them in the right order.
Time: 20 minutes | Cost: $0–$40 | DIY: Yes
Heating season is carbon monoxide season. Press the test button on every unit, replace the batteries, and replace any detector older than its listed lifespan — usually seven to ten years for CO units.
Every home, without exception, and urgently in any home with a gas furnace, gas water heater, fireplace, or attached garage.
Time: 1–2 hours | Cost: $150–$400 | DIY: Call a pro
If you burn wood, get the chimney inspected and swept before the first fire. Creosote buildup is the cause of most chimney fires. If you never use the fireplace, confirm the damper is closed — an open damper is a permanent hole in your house.
Anyone who burns wood. Book in early fall — sweeps fill up by November.
| # | Task | Cost | Time | DIY? | Cost If Skipped |
|---|---|---|---|---|---|
| 1 | Insulate pipes | $20–$60 | 2–3 hrs | Yes | Burst pipe, five figures |
| 2 | Heating tune-up | $100–$200 | 1–2 hrs | Pro | Emergency no-heat call |
| 3 | Seal air leaks | $30–$80 | 3–4 hrs | Yes | Up to 15% of heating cost |
| 4 | Clean gutters | $0–$250 | 2–4 hrs | Caution | Ice dam, ceiling damage |
| 5 | Drain exterior faucets | $0–$15 | 30 min | Yes | Split pipe inside wall |
| 6 | Reverse ceiling fans | $0 | 10 min | Yes | Uneven heating |
| 7 | Change furnace filter | $10–$25 | 5 min | Yes | Longer run times, blower wear |
| 8 | Attic insulation | $400–$1,800 | Half day | Sometimes | Ongoing heat loss |
| 9 | Test detectors | $0–$40 | 20 min | Yes | Carbon monoxide exposure |
| 10 | Chimney sweep | $150–$400 | 1–2 hrs | Pro | Chimney fire |
Task rankings weigh cost of failure against likelihood and effort. Energy figures come from ENERGY STAR seal-and-insulate guidance and U.S. Department of Energy air-sealing materials; freeze-prevention steps follow Insurance Institute for Business & Home Safety recommendations. Cost ranges reflect typical national homeowner pricing and vary by region, home size, and local labor rates. We excluded regionally narrow tasks like snowblower prep and pool closing so the list applies across most of the country. Last updated: September 8, 2026. We review this checklist each fall.
Start in early to mid-fall, before the first hard freeze in your area. Anything involving caulk or a professional appointment should be done while temperatures are still mild and schedules are open.
Insulating water pipes in unheated spaces. It costs under $60 and prevents the most expensive common winter failure.
Water can begin to freeze in exposed pipes when outdoor temperatures fall to about 20°F, though poorly insulated pipes in wind-exposed spots can freeze sooner. Risk climbs sharply the longer temperatures stay below freezing.
A slow drip on faucets served by pipes in exterior walls or unheated areas relieves pressure and reduces burst risk during extreme cold. Treat it as a short-term measure during a freeze, not a substitute for insulating the pipes.
ENERGY STAR estimates an average 15% savings on heating and cooling costs from sealing air leaks and adding attic insulation. The larger savings, though, is the repair you never have to pay for.
If the home will sit empty for more than a few days in freezing weather, shutting off the main and draining the lines is the safest option. If you leave the water on, keep the thermostat at 55°F or higher and open cabinet doors under sinks on exterior walls.
It depends on the age of your systems and what the contract actually covers. Read how home warranties work before you buy, and check whether pre-existing conditions and improper maintenance are excluded — those two exclusions decide most winter claims.
Check monthly while the system is running. Standard one-inch filters generally need replacing every one to three months; homes with pets or heavy dust need the shorter interval.
Light use still deposits creosote, and an unused chimney can collect animal nests and debris. An inspection every year is the standard recommendation, with sweeping as needed based on what the inspection finds.
Insulate the pipes, drain and cover the exterior faucets, change the furnace filter, and test the detectors. That is roughly four hours and covers the highest-risk failures.
This checklist is for general informational purposes and is not a substitute for a professional inspection. Cost and time estimates are typical ranges that vary by region, home age, and local labor rates. Work involving gas appliances, chimneys, electrical systems, or roof access carries real risk — hire a licensed, insured professional when you are not confident the work can be done safely. Insurance coverage for freeze-related damage varies by policy and often depends on whether reasonable care was taken to maintain heat; check with your insurer about your specific policy.
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