Colorado's Front Range doesn't ease into winter โ it swings from 70°F to a hard freeze in the space of a week, sometimes a day. Homes here take that stress every year, and the ones that hold up best aren't necessarily the newest. They're the ones where someone checked a few specific things before the first cold snap.
This isn't a generic "clean your gutters" list. These are the seven checks that actually prevent the expensive repairs we get called about most often, roughly in order of what tends to cause the most damage if it's skipped.
1. Grading and drainage โ the one that protects your foundation
Denver metro sits on expansive clay soil, which swells when it's wet and shrinks when it's dry. If the ground next to your house doesn't slope away from the foundation, water pools against it every time it rains or snows, and that freeze-thaw cycle is what causes slow foundation heave and cracking โ not a dramatic event, just years of small movement. Walk the perimeter after a rain. If water is sitting within a few feet of the foundation instead of running off, that's worth fixing before winter, not after.
2. Gutters, downspouts, and extensions
Clear leaves and debris now, while it's still comfortable to be on a ladder. Just as important: make sure downspouts actually carry water 4โ6 feet away from the foundation, not straight down next to it. A clogged gutter in a hard freeze doesn't just overflow โ the trapped water can back up under roofing and freeze, which is a much more expensive fix than clearing leaves.
3. Roof and flashing
If your roof took any hail this summer โ and most of the Front Range did, in one storm or another โ this is the year to actually look, not assume it's fine. Check flashing around chimneys, vents, and skylights specifically; that's where small gaps turn into ice-dam leaks once snow starts melting and refreezing on the roof.
4. Furnace service and detectors
Schedule furnace service before the first cold week, not during it โ that's when every HVAC company in the metro is backed up. Replace the filter, and test smoke and CO detectors at the same time; CO incidents climb every year in the first weeks furnaces run after months idle.
5. Hose bibs, irrigation, and exposed plumbing
Disconnect hoses, drain and shut off exterior hose bibs, and blow out or shut down irrigation lines before the first hard freeze. A burst hose bib is a small repair; the water damage from one that bursts while you're not home is not.
6. Caulking and weatherstripping
Altitude UV is hard on exterior caulk โ it degrades faster here than at sea level. Check the seals around windows, doors, and any exterior penetrations (vents, cable lines, AC lines). Gaps here are the quiet reason heating bills creep up every winter without an obvious cause.
7. Crawl spaces and exposed pipes
If your crawl space has any exposed plumbing, confirm insulation is still in place and hasn't shifted or fallen. It's a five-minute check that prevents the kind of frozen-pipe call nobody wants to make in January.
Not sure which of these actually apply to your house, or want a second set of eyes before winter? A fall inspection covers all seven in one visit.
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