Winters in the Flathead Valley bring long stretches of freezing temperatures and heavy snow, usually from November into March. For a rental property in Kalispell, Whitefish, or Columbia Falls, that means real risk to pipes, heating equipment, and roofs if the property is not prepared ahead of the season. Winterizing a rental is a shared job. Some tasks fall to the owner, some to the tenant, and knowing where that line sits helps avoid disputes and costly damage.
Who Is Responsible: Owner or Tenant
Montana’s landlord-tenant law sets out clear maintenance duties. Under MCA 70-24-303, a landlord must keep heating, plumbing, and electrical systems in good working order, and must supply reasonable heat between October 1 and May 1 unless the unit’s heat is under the tenant’s own control. The same statute requires the landlord to install an approved smoke detector and carbon monoxide detector in the unit and verify both are working when a tenancy begins. From that point forward, the tenant is responsible for keeping those detectors in good working order, including replacing batteries.
If a landlord does not keep up with a maintenance duty that affects health and safety, MCA 70-24-406 gives the tenant a way to respond. The tenant can give written notice, and if the problem is not fixed within 14 days, the rental agreement can terminate on a date at least 30 days after that notice. If the problem is an emergency, such as a heating failure in freezing weather, the window is much shorter: the tenant can move to end the agreement if the landlord does not remedy it within 3 working days of being notified. This is one more reason heating systems should be checked and serviced before cold weather sets in, rather than after something fails.
Pipes and Plumbing
Frozen and burst pipes are one of the most common and expensive winter problems for a rental. Once outdoor temperatures drop below 32 degrees Fahrenheit, keep a slow drip running in faucets connected to exposed or vulnerable pipes to relieve pressure and reduce the chance of freezing. Pipes running through unheated spaces such as crawl spaces, garages, and attics should be insulated, and cabinet doors under sinks can be left open so warm room air reaches the plumbing underneath.
For a unit that will sit empty for part of the winter, there are two common approaches. One is to keep the heat running and set no lower than 55 degrees Fahrenheit, since the space inside walls and floor cavities, where pipes usually run, stays colder than the living area. The other is to shut off the water supply entirely, drain the pipes by opening faucets, and add non-toxic plumbing antifreeze to toilet tanks and bowls. Outdoor faucets should be shut off and drained either way, and exposed pipe sections benefit from insulation or heat tape rated for the job.
Heating Systems and Detectors
A furnace, boiler, or heat pump should be inspected and serviced by a licensed professional before the heating season starts, and filters on forced air systems should be checked and replaced. Chimneys should also be cleared of buildup at least once a year, particularly for units with wood stoves or fireplaces. While the unit is occupied, the thermostat should generally stay no lower than about 65 degrees Fahrenheit to keep the home comfortable and to reduce strain on the system during extreme cold.
Smoke detectors and carbon monoxide detectors should be tested monthly, with batteries replaced as needed. Under the maintenance duties described above, the landlord verifies these devices work at move-in, and the tenant keeps them working after that. A quick test at the start of the season is a simple way for either party to confirm both devices are functioning before the coldest months arrive.
Roof, Gutters, and Ice Dams
Ice dams form when heat escaping into the attic warms the snow on the roof, causing it to melt and refreeze at the colder eaves. This can force water back under shingles and lead to leaks or, in severe cases, structural damage. Cleaning gutters before the first snow, making sure downspouts direct water away from the foundation, and confirming the attic is well insulated and ventilated all reduce this risk. As a general guide, an attic that stays close to outdoor temperature, rather than noticeably warmer, is less likely to promote the melt and refreeze cycle that causes ice dams.
Sealing Drafts and Outdoor Prep
Air sealing is a low cost step that makes a real difference in comfort and heating cost. Caulking around windows, doors, and other openings, and adding weather stripping where doors and windows meet their frames, helps stop cold air from seeping in. A programmable or smart thermostat can also help hold a steady temperature without constant manual adjustment. Outside, garden hoses should be disconnected, drained, and stored before the first hard freeze, and outdoor faucets should be shut off at the valve and left open to drain, since a hose left attached is a common cause of a frozen and split outdoor spigot.
If the Unit Sits Vacant Over Winter
A vacant rental needs extra attention. Along with the heating and plumbing steps above, it helps to have a neighbor, property manager, or trusted contact check the property periodically for leaks, heating problems, or signs of an ice dam. Notifying local authorities that the property will be unoccupied is also a reasonable precaution. If something does go wrong in a vacant unit, the same short response windows described earlier still apply, so a property manager who checks in regularly is often the difference between a minor repair and a major loss. For an owner or manager who needs to go inside a tenant occupied unit to check on heating or a plumbing issue mid-winter, MCA 70-24-312 still applies: at least 24 hours’ notice is required except in an emergency, when entry without that notice is allowed.
A Note on Insurance
Most landlord and homeowner insurance policies address certain kinds of winter weather damage, but coverage details, deductibles, and any vacancy clause vary by policy and by insurer. Before winter arrives, it is worth confirming with the policy provider that coverage is current and that a unit sitting vacant for an extended period will not affect a future claim.
