Window care: how to maintain PVC and aluminium windows for a longer life

Cleaning, seal and hardware maintenance, ventilation and a seasonal care schedule.

Quality windows can last for many years, but they still need a little regular attention over time. The good news is that you can do most tasks yourself, and they take just a few minutes each season. This article explains what to do, how to do it and what to keep in mind.

Why does maintenance matter?

A window consists of several parts working together: the frame, glazing, seals and hardware (hinges and the closing mechanism). If any part wears out, it affects the whole window: draughts appear, closing becomes harder or insulation deteriorates. Regular care helps you notice problems early and keep your windows working for longer.

1. Cleaning the frame and glass

PVC frames

Clean with warm water and a mild detergent, using a soft cloth or sponge. Avoid abrasive products, metal brushes and solvents, as they can damage the surface.

Aluminium frames

Aluminium resists the weather, but still needs dust and dirt removed, especially at joints and on tracks in sliding systems. Use a mild cleaner and a soft cloth.

Glass

A standard glass cleaner is suitable. Clean in the shade or on a cloudy day so the cleaner does not dry too quickly and leave streaks.

2. Checking and caring for seals

Seals have a major effect on thermal and sound insulation. Inspect them once a year:

A dedicated seal-care product or silicone lubricant can help maintain elasticity. Worn seals can be replaced, often at a much lower cost than buying a new window.

3. Hardware maintenance

Hardware (hinges, locks and the handle) keeps the window working smoothly and securely. Once a year, preferably in autumn:

Do not use too much oil, as it attracts dust.

4. Drainage holes (especially in aluminium windows)

Many windows have small holes to drain water. If leaves or dirt block them, water can accumulate and cause moisture problems. In autumn, check that the holes are clear and clean them with a soft brush or cotton wool if needed.

5. Ventilation and moisture control

Condensation on the inside of a window often highlights the need for regular ventilation. Airtight modern windows retain heat well, but also moisture. To avoid damp and mould around the frame:

6. A seasonal care schedule

In spring

Thoroughly clean frames and glass after winter, inspect seals and check for damage caused during winter.

In autumn

Lubricate hardware, check drainage holes and prepare for the heating season by checking for draughts.

From time to time

Notice whether the window closes easily and watch for condensation between panes or moisture around the frame.

When is maintenance no longer enough?

It is worth getting an assessment. Some problems can be resolved by adjustment or replacing parts, while in other cases window replacement is the more sensible option.

If you notice that:

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