Preparing and Securing a Home for Extended Vacancy: Checklist to Prevent Freeze, Pests, Theft, and Water Damage

Preparing a home for weeks or months away focuses on four overlapping risks: freezing and burst pipes, uncontrolled water loss, pest entry and nesting, and theft/vandalism. Take action on water systems, climate control and humidity, exterior openings, and documentation for anyone checking the property.

Decide whether to leave heat on or shut off and drain

Leaving heat on at a moderate setpoint is a common rule of thumb in freezing climates, with many emergency-prep sources recommending around 55°F as a minimum; however, the exact safe temperature depends on building construction, pipe locations, and local climate, so consult local guidance and consider insulating or draining instead of relying on a single number^[4][1].

If you lower the thermostat to save energy, combine that approach with insulating pipes and sealing cold-air leaks; low setpoints alone can still permit pipes to freeze^[1].

Highest‑reliability option: shut off and drain the plumbing

For extended vacancy in freezing areas, the most reliable mitigation is to shut off the domestic water supply and drain the system per manufacturer and local code instructions (open faucets, drain the water heater, and use approved antifreeze in traps where required). Emergency‑prep guides commonly recommend this approach for long absences^[4].

Before shutting off or disabling any water systems, check appliance and water‑heater manufacturer instructions and local plumbing code; if building fire‑protection or sprinkler systems are present, coordinate with the fire marshal or authority having jurisdiction before taking systems out of service^[4][1].

Middle-ground options: insulation, drip, and local measures

• Insulate exposed water lines in attics, crawlspaces, and exterior walls with foam or tubular pipe insulation and seal air leaks that let cold air reach the pipes^[1][4].
• Open cabinet doors under sinks on exterior walls so warm room air reaches plumbing there^[1][4].
• When draining the system isn't feasible, maintaining a slow trickle (drip) from a cold faucet during severe subzero weather is a commonly cited mitigation to reduce freezing risk^[1][4].

Detecting and stopping leaks: sensors and automatic shutoffs

Passive battery leak sensors placed at likely leak points (water heater base, under sinks, washer, dishwasher, ice maker) will alert you to water but do not stop flow unless paired with an automatic shutoff valve^[11][6].

Whole‑home smart water monitors with automatic shutoff (for example, Moen Flo and Phyn Plus) detect pressure/flow anomalies and can automatically close the main to stop catastrophic loss; manufacturer pages describe pressure/flow sensing, app control, and that professional installation is typically required^[6][7].

Installed cost for smart whole‑home leak‑detection plus shutoff systems varies widely: device MSRPs and DIY sensors can start in the several‑hundred‑dollar range, while professionally installed systems commonly range from a few hundred to over a thousand dollars depending on product, installer, and plumbing complexity; market listings show a broad range (roughly $200–$3,000 in many listings)^[6][7][11].

Some insurers offer premium credits or programs for water‑loss mitigation devices, but eligibility requirements vary and may specify approved models or licensed installation and documentation — check your insurer's specific program for details^[8][6].

Basements, sumps, and backup power

For basements and sump pumps, ensure battery backup on backup pumps or fit float/sump alarms and test them before vacancy; consult the sump/backup manufacturer for testing and battery‑replacement guidance^[11].

Mold grows where there is moisture and can begin to grow on damp surfaces within about 24–48 hours after water exposure; control moisture by repairing leaks and drying wet areas quickly to reduce mold risk^[2][3].

Keep indoor relative humidity below about 60% — ideally in the 30%–50% range — to reduce mold risk; if the HVAC will be off during vacancy, arrange for dehumidification or periodic checks in humid climates^[2][3].

Before leaving, repair active leaks, inspect roof, gutters, and basement for entry points, remove absorbent stored items from basements, and store valuables off the floor to reduce mold and water damage risk^[2][3].

Seal gaps and holes around foundations, vents, pipes, and conduits — small openings around 1/4"–1/2" can admit rodents if left unchecked — and trim vegetation away from the house to reduce harborage^[5].

Reduce attractants by storing food and pet food in rodent‑proof containers, removing yard debris, and using monitoring or traps as appropriate; for persistent infestations, seek professional integrated pest management advice^[5].

Stop mail and newspaper delivery or arrange pickup, use timed indoor/outdoor lights, and ask a neighbor or property manager to check the property periodically. Secure doors, windows, garages, and any outbuildings and consult local crime‑prevention guidance for region‑specific tips^[10].

Document pre‑departure system statuses (water main closed or open, thermostat setpoint, HVAC mode, alarm status), leave clear written instructions for anyone checking the property, and provide contact information for both your designated checker and your insurer if you have a loss‑prevention program tied to devices or inspections^{[4][6][8][10]}.

1. Repair active leaks; inspect roof, gutters, and basement for water entry and fix issues before leaving^[2][3].
2. Decide water strategy: shut off and drain per manufacturers/local code (highest reliability) or insulate pipes + consider drip on vulnerable faucets^[4][1].
3. Install passive leak sensors at water heater, under sinks, washer, dishwasher, and ice maker; pair with automatic shutoff if you want active protection^[11][6].
4. Insulate exposed plumbing, seal penetrations that admit cold air, and open sink cabinets on exterior walls to let warm air circulate^[1][4].
5. Set thermostat strategy and document setpoint and HVAC mode; consider local guidance before choosing a single minimum temperature^[4][1].
6. Service and test sump/backups and alarms; install battery backup where appropriate^[11].
7. Seal exterior openings, remove yard debris, store food in rodent‑proof containers, and trim vegetation away from the structure^[5].
8. Stop mail/newspaper or arrange pickup, set interior/exterior lighting schedules, and arrange regular property checks; leave written system status and contact info for the checker and insurer^[10][4][8].

Costs vary regionally. Professional winterizing, insulating pipes, and basic maintenance pricing varies by market and job complexity; consult local contractors for quotes and use seasonal cost guides for planning^[9].

Smart leak‑detection and shutoff systems range from several hundred dollars for DIY devices up to several thousand dollars for professional solutions depending on equipment and plumbing complexity; check manufacturer and market listings when budgeting^[6][7][11].

Check with your insurer about available credits or program requirements before installing devices if you hope to receive premium reductions: carriers may require approved models, licensed installation, and documentation^[8][6].

• Always follow appliance and water‑heater manufacturer instructions and local plumbing codes when draining or disabling water systems; coordinate with the authority having jurisdiction if fire‑protection systems are present^[4][1].
• After returning, re‑pressurize systems carefully and inspect for leaks and water intrusion; dry any damp areas promptly to prevent mold growth^[2][3].