Preventing Winter Water Damage in Ohio

Ask anyone who has owned a house in Ohio for more than a decade and they can tell you which pipe froze first. It is nearly always the same one: a line running along an exterior wall, through an unheated crawl space, or across an attic above the insulation. Those lines are the first to reach freezing temperature and the last to thaw, and the pressure between a plug of ice and a closed faucet is what splits the pipe.

Prevention in this climate is a set of small habits repeated each season, plus a plan for the days when the forecast drops into single digits.

Freeze Prevention Before the First Hard Frost

• Disconnect and drain garden hoses. A hose left attached holds water in the sillcock and can crack the valve body. Shut off and drain interior lines feeding exterior spigots if your home has them.
• Insulate the vulnerable runs. Foam pipe sleeves on any supply line in a crawl space, garage wall, attic, or rim joist area. Where a line passes through a floor joist near a foundation vent, sleeve it on both sides.
• Air seal and insulate the rim joist. This is one of the highest-value winter projects in an older Ohio home, because it both stops cold air from reaching the plumbing and reduces the heat loss that builds ice dams.
• Close foundation vents for the winter. They keep crawl spaces dry in summer and bleed heat in January.
• Add heat tape to the worst line. If one pipe has frozen before, a thermostatically controlled heat cable on that section is a reasonable, inexpensive fix.
• Locate your main shutoff and test it. Everybody intends to find it during an emergency. Find it now, and make sure the valve actually closes.
• Insulate the water heater and any exposed piping in the basement to reduce the chance of freezing near an exterior wall.

Ice Dams: The Attic Problem That Shows Up on the Roof

An ice dam is not caused by snow load. It is caused by warm air escaping from the living space into the attic, melting snow on the roof deck, and that meltwater refreezing at the cold eave. Water then backs up behind the ice and travels under shingles, into sheathing, and eventually through the ceiling of the room below.

The permanent fix is always in the attic: seal air leaks around plumbing stacks, exhaust fans, and light fixtures, and make sure insulation covers the top plates of exterior walls without blocking soffit ventilation. Attic insulation added after the fact creates a different problem, and the bathroom exhaust fan is the most common culprit in Ohio homes.

For the current season, a roof rake can remove snow from the bottom three or four feet of the roof, which is where dams form. Do it safely — standing on the ground, never on the roof — and stop before you reach the point where a rake cannot reach without putting you near the edge. Calcium chloride pucks placed on the dam in a vertical line can open a channel, though this comes with shingle wear and is a temporary measure, not a repair.

The January Thaw Is the Quiet Hazard

Ohio does not stay below freezing for long. When temperatures swing into the forties for a few days, two things happen at once: frozen pipes thaw, and frozen ground releases water it cannot absorb yet. That combination produces more basement water than the coldest week of the year.

Prepare for it:

• Test your sump pump and clear the discharge line. A discharge hose that froze shut in December will send water straight back where it came from. Check the line runs downhill and terminates well away from the foundation.
• Clear snow away from the foundation. Snow piled against the house releases meltwater directly against the wall. Shovel it back a few feet while it is still snow.
• Keep gutters and downspouts clear. Ice-filled gutters overflow against the fascia and wall, and downspouts that drain at the base deliver water right back into the basement.
• Make sure the ground slopes away. During a thaw is a good time to notice where water is pooling. Low spots against the foundation are worth correcting with soil in spring.
• Keep a wet-dry shop vac handy but do not rely on it for anything beyond the first inch or two. Real extraction starts with a pump.

Indoor Habits That Reduce Winter Water Risk

• Never set the thermostat below about 55 degrees when you are away, and leave cabinet doors open under sinks on exterior walls during cold snaps so indoor air reaches the pipes.
• Let a trickle of water run from the most vulnerable faucet during an extended deep freeze. Moving water freezes far less readily than still water, and it costs a few cents.
• Watch the humidifier. Whole-house humidity settings that are fine in October condense on cold window frames in January, and that condensation runs down into sills and wall cavities. Lower the setting as outdoor temperatures drop.
• Check the furnace condensate line. High-efficiency furnaces produce water, and a frozen or blocked condensate line will shut the system down or send water onto the floor.
• Inspect for condensation on windows and pipes each week. If you see it, add airflow before it becomes a moisture problem.

Leaving Home for a Winter Trip

The classic serious loss is a burst pipe in a house with no one in it. If you will be away for more than a few days in winter:

1. Keep the heat no lower than 55 degrees, and make sure someone can check the house.
2. Shut off the main water supply and open the lowest faucet in the house to drain the lines. For longer trips, drain the water heater as well.
3. Consider a leak sensor or a smart shutoff valve that closes the main when it detects flow during a period when the house should be idle.
4. Note the name and number of a plumber and a restoration contractor before you leave, so a neighbor can act quickly if something happens.

If a Pipe Freezes Anyway

Turn the faucet on first, so melting water has somewhere to go, then warm the pipe gradually with a hair dryer, a space heater used at a safe distance, or warm towels. Never use an open torch in a wall cavity. If the pipe has already split, shut off the main, open the lowest faucet, and call. Freeze damage often stays invisible until the thaw, and that is the failure that floods a house in the middle of the night.