How to take care of your windows in winter? A practical guide for the cold months.

How to Take Care of Windows in Winter? A Practical Guide for the Cold Months

Winter is the time when windows operate under the most demanding conditions. Low temperatures, moisture, snow, and significant differences between indoor and outdoor temperatures can affect their airtightness, the condition of the frames, and even the durability of the hardware. Proper winter window maintenance not only helps preserve their appearance but also improves thermal comfort and reduces energy loss.

In this guide, we present practical and proven methods for maintaining windows during winter, ensuring they work reliably throughout the entire heating season.

1. Regular Ventilation – the Key to Reducing Moisture

Even though people tend to avoid opening windows during winter, ventilating the rooms is essential to prevent condensation and mold formation. Short, intensive ventilation sessions a few times a day:

• reduce humidity levels,

• improve air quality,

• prevent moisture buildup on frames and glass.

The best technique is shock ventilation – fully opening the window for 3–5 minutes instead of leaving it tilted for long periods.

2. Checking Window Seals – Protection Against Heat Loss

Seals are one of the most important elements of a window during winter. They ensure tightness, eliminate drafts, and protect the interior from cold air.

To maintain them in winter:

• check whether they are cracked or detached,

• clean them with a damp cloth,

• apply a silicone- or glycerin-based conditioner to prevent hardening.

Regular seal maintenance can extend their lifespan by several years and significantly improve the thermal insulation of your windows.

3. Hardware Adjustment – So the Windows Close Perfectly

In winter, it’s important to ensure that windows close properly. If the handle is stiff, the sash rubs against the frame, or you feel drafts, the hardware may need adjustment.

Common signs include:

• drafts along the edges,

• difficulty closing the window,

• improper sash-to-frame alignment,

• noticeable looseness in the handle mechanism.

Well-adjusted hardware improves thermal comfort and reduces energy consumption. It’s best to inspect windows at least once a year, ideally before the heating season begins.

4. Cleaning Glass and Frames – More Than Just Appearance

During winter, windows accumulate dirt, dust, smog, and salt carried in the air. Regular cleaning:

• improves light transmission,

• prevents hardware corrosion,

• extends the lifespan of frames and profiles,

• supports proper seal performance.

Use gentle cleaning agents designed for PVC or aluminum windows. Avoid harsh chemicals, which can damage the surface of the profiles.

5. Removing Ice and Snow Around Windows

Accumulated snow and ice can cause:

• freezing of moving parts,

• difficulty opening windows,

• moisture buildup in frames,

• profile deformation.

To prevent this:

• regularly clear snow from exterior window sills,

• avoid forcing open a frozen window,

• use mild, window-safe de-icing products.

Never use sharp tools — they can permanently damage the surface.

6. Checking Air Vents and Ventilation

Many modern windows include ventilation inlets that can clog with moisture or dirt during winter. This disrupts airflow and increases condensation on the glass.

Make sure to:

• clean air vents from dust and buildup,

• check airflow,

• set the ventilation mode appropriately for winter.

Good ventilation helps prevent foggy windows and excessive indoor humidity.

7. When to Consider Replacing Windows with Energy-Efficient Ones?

If despite proper maintenance your windows still:

• let in cold air,

• have failing seals,

• are difficult to close,

• cause significant heat loss,

it may be a sign that replacement is needed.

Modern energy-efficient windows:

• reduce heating costs,

• improve comfort in both winter and summer,

• increase property value,

• offer better sound insulation.

For homes with major heat loss, replacing old windows is a cost-effective investment.

Summary – Proper Winter Window Care Means Comfort and Savings

Taking care of your windows during winter helps:

• prevent heat loss,

• extend window lifespan,

• improve home comfort,

• avoid condensation and mold,

• reduce heating bills.

Winter doesn’t have to be difficult for your windows — just a few simple maintenance steps will keep them functioning reliably all season long.