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The STR Owner's Guide to Preventing Property Damage Between Bookings
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A scenario that all short term rental operators dread is entering one of their units to discover water pooling across the floor or mold climbing the walls. Unlike hotels with round-the-clock staff or long-term rentals with steady occupancy, STRs frequently sit empty, from a few days to perhaps weeks at a time in seasonal markets or remote areas.
Frozen pipes. Leaking water heaters. Failing HVAC systems. It doesn’t take much, a cracked window, a forgotten thermostat setting, for a manageable problem to escalate into thousands in damage, weeks of lost income, and a potential hit to your property’s reputation.
The Risks Posed by Vacant Periods
It’s easy to overlook how quickly a small issue can spiral into something serious and expensive. Water damage and freezing incidents consistently account for over 20 percent of all U.S. home insurance claims most years, with total losses exceeding $13 billion annually. A typical claim can be over $12,000, and in high-end STR properties, that number can climb higher.
Even something as minor as a slow leak or a loose hose on a washing machine can turn costly fast. Mold doesn’t wait. It can start spreading quickly, turning a simple fix into a full-blown remediation job.
These risks only grow when a short-term rental sits empty. No guests, no staff, no local oversight means that issues like a dripping HVAC line or a window left ajar can go unnoticed for days or weeks.
And the consequences aren’t just financial. If a unit has to be taken offline for repairs, that’s time without bookings. Property insurance premiums could also increase with repeated claims. And if a guest does arrive to find an unresolved issue, the resulting review can linger long after the repairs are done.
Smarter Ways to Stay Ahead of the Problem
Each STR property is unique and your oversight needs will be determined by your specific circumstances. Below are some best practices that STR operators can consider when planning their strategy.
Physical Inspections: Schedule property walk-throughs every 7-10 days during vacant periods. Create a checklist for local partners or cleaning crews that includes checking under sinks, around water heaters, HVAC condensation lines, and window seals. Pay special attention to PTAC units (through-wall air conditioners) which are often sources of slow leaks.
Departure Protocols: Implement a mandatory checkout procedure that cleaning crews must complete: verify all windows are latched, set thermostats to maintain 55-68°F in winter and below 78°F in summer.
Smart Monitoring Technology: Install wireless leak detectors under every sink, beside water heaters, near washing machines, and beneath HVAC units. Temperature and humidity sensors should go in bathrooms, kitchens, and any rooms with exterior walls. Advanced systems send alerts via text, email, and live operator calls when the sensors detect an issue.
Seasonal Preparations: Before winter, insulate exposed pipes, winterize outdoor hoses, and know the location of your main water shutoff. For humid climates, ensure HVAC systems are set to run periodically even when vacant to control moisture. Consider installing automatic water shutoff valves that can be controlled remotely if a leak is detected.
Case Study: Smart Monitoring Systems
When it comes to water leak, humidity and temperature detection, smart monitoring systems are becoming both increasingly sophisticated and easy to implement. These systems use wireless battery-powered sensors that communicate through long-range networks, allowing simple setup and effective coverage of entire buildings.
If a water leak is detected, or if humidity or temperature readings move out of the expected range, property managers receive instant alerts via live operator calls and text messages.
For example, a vacant apartment using ProSentry’s smart monitoring system was able to detect and prevent a potentially catastrophic situation when the system detected dropping temperatures during a January cold snap. The unit, which was up for sale, had been shown by a realtor who failed to properly latch the terrace door. As outdoor temperatures plummeted to 15° Fahrenheit, the open door allowed freezing air to pour in, dropping the interior temperature to 48° Fahrenheit. ProSentry was able to promptly alert the building superintendent who immediately entered the apartment and discovered the problem.
Installation of these systems is surprisingly straightforward. Sensors about the size of a popsicle stick are placed in vulnerable areas: under sinks, near water heaters, and next to HVAC units. Each sensor connects wirelessly to a gateway device which is similar to a WiFi router. Each sensor has a QR code which is scanned during setup so each location can be named.
Wrapping Up
The periods between bookings may seem uneventful, but this is often when STR properties are at their most vulnerable if there is no active monitoring in place.
Preventive strategies don’t need to be complex or costly. A combination of basic procedures, occasional physical check-ins, and a few well-placed sensors can significantly reduce the chances of small problems turning into major losses.
By Nadav Schnall, CEO of smart building monitoring company ProSentry, which provides comprehensive wireless sensor networks that monitor for water leaks, gas leaks, and other building risks, delivering real-time alerts and live operator calls to prevent issues from escalating into major claims. The company’s platform has caught over 3,600 leaks with zero false alarms, helping buildings secure insurance discounts and coverage that might otherwise be unavailable.
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