How to prepare wooden windows for winter ?

Frosts, rainfall, and snowfall are a real test for wooden windows. In winter, wood works more intensively than in other seasons — under the influence of moisture and low temperatures, it can shrink, swell, or even slightly deform. Combined with strong wind or freezing rain, this poses a significant challenge for frames and seals, which may lose their elasticity over time. If the wood is not properly protected, it can absorb moisture, leading to cracking or peeling of the paint. In turn, leaks in windows mean heat escaping from the home, resulting in higher heating bills and reduced indoor comfort. That is why it is so important to take some time for window inspection and maintenance before winter arrives. The good news? All the most important tasks can be done by yourself — without calling in professionals.

Clean the frames and check the protective coating

Start by thoroughly washing the window frames — remove dust, dirt, and any remaining cleaning products. Use a mild detergent and a soft cloth. After the surface has dried, inspect the wood carefully: if you notice dull areas, chipped varnish, or micro-cracks, it is worth refreshing the protective coating. Lightly sand the damaged areas with sandpaper and apply a new layer of impregnation or varnish. This will restore the wood’s resistance to moisture and low temperatures.

Check the condition of the seals

They are responsible for the airtightness of windows and for keeping heat inside the home. Over time, seals can harden or start to come loose. If you notice that air is “drafting” around the frame, it is worth replacing them — a simple fix that significantly improves thermal comfort. In DIY stores, you can find various types of self-adhesive seals that can easily be matched to your window model.

Take care of the fittings and hinges

In winter, metal components are particularly exposed to corrosion. Therefore, before the frosts arrive, wipe the hinges and fittings with a dry cloth and then lubricate them with a suitable product — preferably a silicone-based lubricant or technical petroleum jelly. Regular lubrication will ensure that the sashes open smoothly and that the window remains properly adjusted and airtight.

Check the airtightness of the windows

A simple test can be done on your own — place a sheet of paper between the sash and the frame and close the window. If the paper slides out easily, it means the window needs adjustment. In many cases, it is enough to slightly tighten the hinges or adjustment screws.