Winterizing Guide 2026: Sustainably Maintaining Your Accommodation

Even though designed to withstand intensive use and outdoor conditions, unusual accommodations require an appropriate preparation when activity slows down or stops during the winter period. Proper winterizing not only prevents damage due to freezing and moisture, but also helps to maintain comfort, equipment, and the overall quality of the accommodation in the long term.

In this 2026 edition, we have compiled best practices for maintenance and winterizing in a clear, fluid, and concrete guide, designed for professionals who wish to secure their investment and approach the following season with peace of mind.

Protecting the Water Network and Preventing Freezing

Water management is the most sensitive aspect of winterizing. As soon as accommodation is no longer occupied regularly, the risk of freezing in the pipes becomes real.

It is essential to shut off the main water supply and proceed with a complete drainage of the network. All faucets must be opened to allow for the total evacuation of water, both cold and hot. The hot water tank must be completely drained, and then turned off. Sanitary equipment, such as toilets, must also be flushed to avoid any retention.

Traps and drains deserve special attention. Once emptied, the addition of a specific sanitary antifreeze can be considered to protect the seals and prevent odors from rising during the closure period.

Managing Heating, Electricity, and Technical Equipment

Depending on your operating mode and the duration of the winter shutdown, two approaches are possible. Some professionals choose a complete shutdown of the accommodation, with the heating and equipment turned off, provided that the water network is fully protected. Others prefer frost protection, especially in humid regions or when the accommodation contains sensitive materials.

In this case, the heating is set to a minimum temperature, generally around 8°C, to limit thermal shocks. This solution involves regular monitoring of consumption and proper functioning of the installations.

Electrically, it is recommended to unplug or turn off all non-essential devices. The electrical panel must be checked and secured. A minimal power supply can be maintained if ventilation or frost protection systems are active, provided that monitoring is ensured throughout the winter period.

Preserving Clean Air and Controlling Humidity

An accommodation closed for several weeks or months remains exposed to stagnant humidity, the main cause of interior degradation. Ventilation plays a central role here.

Ventilation grills must remain unblocked and functional. When the installation allows, maintaining the Mechanical Ventilation Control (VMC) is strongly advised to ensure a continuous air renewal. It is important to avoid an airtight closure without air circulation, which would promote the appearance of mold and persistent odors.

Good humidity management helps to preserve finishes, coatings, and the overall comfort of the accommodation.

Prepare the Interior Before Closing

Winterizing always starts with a complete cleaning of the accommodation. Surfaces must be cleaned and perfectly dried before closing. Textiles, such as linens, cushions, or carpets, should ideally be removed or stored in dry conditions.

The refrigerator should be emptied, defrosted, and cleaned, then left slightly open to prevent any condensation. Similarly, leaving cabinet doors slightly open helps to promote air circulation and prevent unpleasant odors.

These simple actions, often overlooked, greatly facilitate the spring reactivation process and contribute to maintaining a quality image of the accommodation.

Anticipating the Restart

Winterization is part of a sustainable maintenance approach. By anticipating, monitoring, and regularly maintaining your accommodation, you secure your investment and extend the performance of your facilities season after season.

For any questions related to maintenance, winterization, or operation of your accommodations, the Nordic House team is at your disposal.

Do not hesitate to contact us to discuss your project and your specific needs.

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