Winterizing your home is one item on the fall maintenance list. It’s not the whole list. If you own a home in Northern Colorado, there are another dozen things worth doing between the first cool nights of September and the first snow — and doing them now, instead of scrambling in December, saves both money and stress.
Here’s the checklist I hand every homeowner client heading into fall.
Exterior — before the ground freezes
- Walk your foundation. Look for new cracks, gaps where siding meets foundation, and any signs of water pooling. Small fixes now are cheap. Ignoring them into winter isn’t.
- Clean and seal your driveway. Concrete and asphalt driveways in Colorado get abused by freeze-thaw cycles. A crack sealer applied on a warm October day extends life by years.
- Check exterior caulking. Around windows, doors, vents. Recaulking a few gaps before winter prevents drafts and moisture intrusion.
- Trim trees away from the house. Especially any branches over the roof or hanging near power lines. Heavy snow loads snap weak branches.
- Test outdoor lighting. Fall daylight shortens fast. Replace burned-out bulbs before you’re doing it in the dark and cold.
Roof and gutters — the two-visit rule
Gutter cleaning isn’t a one-and-done in Northern Colorado. Deciduous trees drop leaves in waves through October and into November. I recommend two gutter cleanings: one in mid-October, one in late November after the last leaves come down.
While you’re up there (or hiring someone who is), look at the roof. Missing shingles. Flashing pulled away from chimneys. Ice-and-water shield still intact around vents. A $200 roof inspection catches problems that become $5,000 fixes after a winter of leaking.
Interior systems
- Furnace service. Non-negotiable. Book it in September or early October before HVAC companies are booked out three weeks.
- Humidifier check. If your furnace has a whole-house humidifier, service the pad and test the water line. Colorado winter air is arid and a working humidifier keeps wood floors and trim from cracking.
- Water heater flush. Sediment builds up in the tank over the year. A drain and flush extends life and improves efficiency. Do this annually.
- Reverse ceiling fans. Switch fans to clockwise (looking up) so they push warm air back down. Easy win, small impact, but free.
- Change all HVAC filters. Not just when your furnace tech is there. Every 60–90 days through winter.
Safety systems
Test every smoke and CO detector. Replace batteries. Any detector more than 10 years old should be replaced entirely — not the battery, the whole unit. Colorado’s dry winter air and forced-air heating make CO issues more common than in humid climates. This is not the checklist item to skip.
Have a working fire extinguisher in the kitchen and near the furnace. Check the pressure gauge on any you already own.
Landscaping and yard
- Aerate and fertilize the lawn. Fall is the best time for both in Northern Colorado. Grass recovers over winter and comes back stronger in spring.
- Rake or mulch leaves before they mat. A leaf-matted lawn suffocates the grass beneath. Ten hours of raking in October saves overseeding in April.
- Cover or move outdoor furniture and grills. Sun-faded cushions and rusted grill tops are avoidable.
- Sharpen and store lawn equipment. Drain gas from mowers, sharpen blades, and store dry.
- Wrap young trees. Winter sunscald and rabbit damage on young trunks is a real Colorado issue. A cheap tree wrap prevents both.
Plumbing prep
Beyond the sprinkler blowout (which you should have done in the winterization list): disconnect all hoses, drain and store them, cover exterior spigots, and insulate any pipes in unheated spaces. Add hot water heater blanket if you haven’t.
Locate your main water shutoff. Actually walk to it and turn it on and off. If you have a burst pipe in February at 2am, you’ll know exactly where to run.
Emergency preparedness
- Emergency kit. Flashlights, batteries, non-perishable food, water for 48 hours, phone chargers.
- Ice melt and shovels. Buy before the first snow. Prices double and shelves empty when the first storm arrives.
- Backup heat plan. Colorado power outages happen. A safe backup heat source (electric space heater, wood in the fireplace, generator plan) is worth thinking about before you need it.
The documentation habit
Keep a folder — physical or digital — of every service you had done. Furnace tune-up receipt. Roof inspection. Chimney sweep. Sprinkler blowout. When you sell someday (or when a warranty issue comes up), that folder is worth its weight in gold.
How I’d want you to feel by November 1
Ready. Not scrambling. Confident that the first hard freeze isn’t going to reveal a problem you could have prevented.
At All Avenue, we hand this checklist to every client heading into fall. If you’d like a walkthrough specific to your home — or a referral to any of the trades that keep our clients ahead of winter — I’d love to help.