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3 cited sources on this page · Reviewed August 16, 2026Key takeaways
The short version
- Duration, not volume, drives the cost in a closed building.
- Shutting the main is not the same as draining the system.
- Monitored sensors turn a four-month loss into a two-day one.
- Insurers may ask what precautions were taken.
The short answer
Direct answer
A freeze failure in an unoccupied Vermont property can run for months undetected, which is why seasonal buildings produce the largest losses. Proper winterising means draining and blowing out the plumbing rather than only shutting the valve, and a monitored low-temperature and leak sensor is the single highest-value addition where power remains on.
Why duration dominates
A supply line running unattended does not stop at the room it started in. Water finds the structure, moves between floors, saturates insulation and framing, and by spring the building has had months of conditions that support decay and growth.
The same failure in an occupied house is noticed in minutes. That is the entire difference, and it is why seasonal properties dominate the largest residential losses.
What proper winterising involves
Turning off the main and opening a tap leaves water in traps, low points, water heaters, pumps and appliance lines. Proper winterising drains the system, blows lines out with compressed air where appropriate, and protects traps.
Heating systems, well pumps and pressure tanks each have their own requirements. This is worth having done properly once and documented rather than improvised annually.
Start the restoration request
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Send the address, callback number and a short description of the damage. You do not need to diagnose the problem before requesting help.
Monitoring changes the category of loss
Where power remains on, a low-temperature alarm and leak sensors that report remotely convert an unlimited-duration loss into a short one. The cost is modest against a whole-building restoration.
Where power is off entirely, the emphasis shifts to fully draining the system, because nothing will be detected until someone arrives.
A closing routine worth writing down
The value is in doing the same thing every year and recording that you did, which also matters if an insurer asks.
- Shut and drain the supply, including the water heater
- Blow out lines where the system is set up for it
- Protect traps against evaporation and freezing
- Drain or protect any well pump and pressure tank
- Set heating to a maintenance temperature if power stays on
- Install or test low-temperature and leak sensors
- Record the date and who did the work
Arranging for someone to look
A neighbour, caretaker or property manager checking periodically is worth more than most devices, because a person notices things a sensor does not: a door blown open, an ice dam forming, a roof load.
Agree what they check and how they reach you, and make sure they can get in.
If you open up to a flood
Do not restore power to a building where water may have reached electrical components. Document everything before moving anything, and expect the assessment to involve concealed materials rather than only what is visible.
A months-long loss is an inspection problem more than a drying problem. The extent has to be established before a scope means anything.
Camps across Lamoille, Franklin and the Champlain shoreline
Seasonal properties are a significant part of the housing stock in Cambridge, Jeffersonville, Underhill and the Franklin County towns, along with shoreline camps around Lake Champlain. Many are on private wells with pressure tanks, which adds components that must be drained rather than only shut.
Vermont winters produce sustained deep cold rather than brief snaps, so a building that is merely shut rather than properly drained will eventually find its coldest point. Where a camp is also on septic, an unheated season raises questions there too.
Clear answers
Common questions
Is shutting off the water enough to winterise?
No. Water remains in traps, low points, water heaters, pumps and appliance lines. Proper winterising drains the system and protects those components.
What is the single best thing to add?
Where power remains on, a monitored low-temperature alarm and leak sensors. They convert an unlimited-duration loss into a short one.
Will insurance cover a freeze in an unoccupied building?
It depends on the policy, and insurers commonly ask what precautions were taken. Documented winterising and monitoring support the claim.
What if power is off all winter?
Then detection is not available and full draining matters more. Arrange for someone to check the building periodically.
Is a low thermostat setting enough to protect a camp?
Not on its own. Power fails, furnaces fail, and a setting that works in a normal winter does not protect against either. Shutting the water off at the main and draining removes the dependency entirely.
How often should an empty camp be checked?
Often enough that a failure is measured in days rather than weeks. There is no universal number, but the loss scales almost directly with the interval between checks.
Authoritative references
Sources used on this page
Time-sensitive rules and public guidance should be checked at the source before work begins.