Why Delaware, Ohio Homes Freeze Pipes Every Winter

Written by the Delaware 24/7 Plumbing team · Winter Guide

Ohio consistently ranks among the top ten states nationally for pipe-freeze damage, according to insurer data from State Farm. That statistic isn't abstract if you live in Delaware County. Every winter, our emergency line gets calls from homeowners who thought their pipes were fine until a hard freeze proved otherwise.

Why This Happens Here Specifically

A pipe freezes when it sits somewhere cold enough, for long enough, without any heat reaching it. In Delaware, Ohio, that usually means one of three locations. Exterior walls, especially in older downtown homes built before modern insulation standards, put plumbing closer to outside temperatures than most homeowners realize. Unheated basements and crawlspaces are the second common spot, since a pipe running through an unconditioned space has no protection at all during a multi-day cold snap. Garages with plumbing running along an exterior wall are the third, and they're often the last place a homeowner thinks to check.

The freeze itself isn't usually what causes the expensive damage. Water expands as it freezes, and that expansion inside a closed pipe builds pressure until something gives, usually at a joint or a weak point in the pipe wall. The pipe can be frozen solid for days without bursting, then fail hours after temperatures start to rise again, which is why plumbers see a real spike in burst pipe calls during a thaw, not just during the cold snap itself.

What Actually Prevents a Freeze

Pipe insulation on any exposed line in a basement, crawlspace, or garage is the single most effective step, and it's inexpensive compared to the cost of a repair. Foam sleeves from a hardware store cover most standard pipe diameters and take an afternoon to install correctly.

Sealing drafts near exterior-wall plumbing matters more than people expect. If you can feel cold air near a pipe with your hand, that draft is actively pulling the pipe's temperature down. Caulk around where pipes penetrate a wall or floor closes that gap.

During an actual hard freeze, a small trickle of water from the faucet farthest from your main shutoff keeps water moving through the line, which meaningfully reduces freeze risk. Keeping cabinet doors open under sinks on exterior walls lets household heat reach pipes that would otherwise sit in a closed, cold space.

Outdoor Hose Bibs and Irrigation Lines

Outdoor spigots and any irrigation system are genuinely easy to overlook until they fail. Disconnect garden hoses before the first hard freeze of the season, since a hose left attached traps water in the spigot itself and dramatically raises freeze risk even on a supposedly frost-free fixture. Shutting off the water supply to outdoor spigots from an interior valve, then draining the remaining water from the line, is worth doing every year rather than assuming last year's setup is still fine.

An irrigation system that hasn't been properly winterized, with compressed air used to clear water from the lines, is a common source of spring repair calls once the ground thaws and a cracked underground line becomes obvious.

If a Pipe Already Froze

A frozen pipe that hasn't burst yet is still an emergency worth acting on quickly. Shut off the water to that section if you can identify it, and apply gentle heat, like a hair dryer on low, starting from the end nearest the faucet and working toward the frozen section. Never use an open flame. If you can't tell whether the pipe has already cracked, treat it as if it has and shut off your home's main water valve until a technician can check it.

Why the Same Wall Sometimes Freezes More Than Once

A wall that froze last winter is a genuine risk for freezing again, and it's not bad luck. If the underlying insulation gap that let cold air reach the pipe was never actually fixed, the same conditions that caused the first freeze are still present the next time temperatures drop. Homeowners sometimes thaw a frozen pipe, repair any resulting damage, and consider the problem solved, without addressing why that specific section got cold enough to freeze in the first place.

A real fix means finding and sealing the actual draft source, not just insulating the pipe itself. Pipe insulation slows heat loss, but it doesn't stop a genuinely cold draft from eventually winning out during a multi-day hard freeze. Checking the wall cavity, sill plate, and any nearby penetrations for gaps is worth doing once, properly, rather than repeating the same emergency call every few winters.

What This Costs If You Wait

A burst pipe repair itself is often a modest cost compared to what happens if the leak runs for any length of time before it's caught. Water finding its way into drywall, flooring, or a finished basement adds real restoration cost on top of the plumbing repair, and that combination is what actually drives the expensive insurance claims each winter. Addressing a known freeze-prone spot proactively, before it fails again, is consistently the cheaper path over a few winters compared to treating each freeze as an isolated emergency.

A Realistic Winter Prep Timeline

Late fall, before the first genuinely hard freeze arrives, is the right window to insulate exposed pipes, disconnect hoses, and seal any drafts you've identified. Waiting until a cold snap is already forecast leaves little margin, especially if a needed repair like sealing a wall gap turns out to be more involved than expected. A yearly walkthrough of your basement, crawlspace, and garage with this checklist in mind takes under an hour and meaningfully lowers your real risk for the whole season ahead.

Common Questions About Frozen Pipes in Delaware

How cold does it actually need to get for a pipe to freeze? Sustained temperatures below roughly 20 degrees Fahrenheit for six hours or more start putting exposed pipe in unheated spaces at real risk, though an exterior wall pipe can freeze at a somewhat higher outdoor temperature if there's a genuine draft reaching it directly.

Can a pipe freeze even if my heat is running normally? Yes. Household heating warms living spaces, not necessarily a wall cavity, an unheated crawlspace, or a garage. A furnace running fine doesn't guarantee every pipe in the house is protected, which is exactly why targeted insulation in those specific areas matters as much as whole-house heating.

Is it true that a slowly dripping faucet prevents freezing? A trickle of water moving through a pipe does genuinely reduce freeze risk, since moving water is harder to freeze than standing water, but it's a supplement to insulation and draft-sealing, not a replacement for them on a pipe that's already poorly protected.