Cleaning and caring for windows properly
For long-lasting Kömmerling quality
Well-maintained Kömmerling windows not only look good—they also remain airtight, easy to operate, and energy efficient. With the right cleaning and simple regular maintenance, you can protect frames, seals, fittings, and glass in the long term and preserve the value of your home.
Why cleaning and maintenance are so important
Windows are used daily: opening, tilting, closing, temperature changes, moisture, and dirt from outside—all of this affects the material and mechanics. If frames, seals, and fittings are not regularly maintained, they may become stiff, leaks may develop, or surfaces may deteriorate.
With just a few targeted care steps, you ensure that your Kömmerling windows continue to function reliably—and that you enjoy their appearance and performance for many years. Your windows deserve regular care.
Did you know?
Effective care for better living comfort – step by step
Gently cleaning PVC-U profiles*
For normal dirt, gentle cleaning is sufficient:
- Lukewarm water
- Mild dishwashing detergent
- Soft cotton or microfiber cloth
This reliably removes typical dirt without scratching the surface of the PVC profiles. Dry cleaning with a duster or using scouring agents or solvent-based polishes and cleaners—such as nail polish remover or “plastic cleaners”—should be avoided.
Caring for the seals
Seals keep drafts and moisture out—provided they remain clean and supple:
- Regularly remove dust and deposits
- Lightly grease them when needed
- Carefully press seals that have slipped out back into the groove with your thumb—avoid sharp objects
This helps maintain proper pressure and ensures your windows stay tightly closed.
Maintaining the fittings
Fittings are the heart of window mechanics:
- Lubricate all moving parts once or twice a year with resin- and acid-free oil or grease
- Take stiffness seriously—it often signals overdue maintenance
- Regularly remove dirt so dust and fine particles don’t enter the mechanism and cause premature wear
Complex fitting adjustments should be handled by a professional to maintain optimal function and tightness.
Cleaning the glass properly
For a clear view, all you need is:
- Warm water
- Good window leather
- Optionally a splash of dish soap
Abrasive or solvent-based cleaners should be avoided as they can damage glass and seals.
*Individual solutions for every surface
Depending on the window surface, the right cleaning method applies:
- White PVC profiles: Stubborn dirt can be removed with KöraClean extra.
- Laminated profiles in solid colors, metallic tones, or wood designs: KöraClean color is the right choice.
- Matt laminates surfaces (e.g., mattex, woodec): Clean with soapy water or a cleaner recommended by the foil manufacturer.
- proCoverTec and AcrylColor surfaces: Simply clean with water and a sponge—usually nothing more is needed.
Seasonal winter check – extra care for cold days
In winter, windows are exposed to special stresses. A quick check pays off:
- Inspect seals for cleanliness and elasticity
- Lubricate fittings if they feel stiff
- Clean frames so dirt doesn’t trap moisture
This keeps your home warm even during frost—and your windows easy to operate despite temperature changes.
Advice and maintenance from experienced professionals
Many care steps can be done yourself—but for adjusting fittings or professional maintenance, a window specialist is your best contact.
Authorized Kömmerling partner companies support you with:
- Selecting suitable cleaning products
- Regular maintenance
- Checking seals, fittings, and glazing
This ensures your windows function reliably for many years.
