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Maintenance4 minUpdated

Window care: glazing, seals and hardware

Window care starts with gentle cleaning and a visual check of seals and moving parts. Products and lubrication points depend on the material, finish and hardware fitted: use their instructions. A stiff handle, rubbing sash or loose component calls for assessment rather than improvised adjustment.

BO Fenster practical guide
White PVC window in a kitchen

1. Keep the right instructions

Store window and hardware references with the installation paperwork. PVC, coated aluminium and painted timber do not necessarily use the same care products. Ask for the instructions matching the actual finish and record previous work. These details help you describe any problems later.

2. Clean without damaging surfaces

Kömmerling recommends lukewarm water, a soft cloth or sponge and a suitable mild cleaner. Avoid abrasives, solvents and tools that could scratch. Remove loose dust first and check compatibility with neighbouring surfaces. For timber and special finishes, follow the relevant manufacturer’s recommendations.

3. Look at seals and accessible areas

During cleaning, look for seals that have slipped out of their grooves, torn or collected deposits. Photograph anything unusual and identify its position on the window. Do not choose a replacement seal just because it looks similar. Ask for the compatible reference and care method; a hardware product is not automatically suitable for rubber.

4. Care for hardware as instructed

SIEGENIA distinguishes care of moving parts from adjustment and replacement. Its TITAN instructions specify suitable lubricants for particular points. This does not mean spraying a product throughout the mechanism. Confirm which points users can access and the applicable intervals. Frequent use and exposure are useful topics for a maintenance discussion.

5. Know when to ask for help

If the sash rubs, the handle resists or a part appears loose, describe what you observe without forcing it. Do not remove the sash or adjust hinges to experiment. Photograph the overall window and the detail, then request a check. If operation seems unsafe, stop using the element until it has been assessed.

6. Keep a simple maintenance record

Use the intervals in the instructions supplied for your elements and set a reminder. Record cleaning, products and observations. Dated photographs help track changes and distinguish one window from another.

  • Window reference and hardware identification if available.
  • Date, product used and work carried out.
  • Displaced seals, unusual marks, rubbing or closing difficulties.
  • The question sent to the professional and the response received.

Sources and documentation

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Frequently asked questions

Quick answers

Can one product clean everything?

Only after checking compatibility. Glass, seals, timber, coatings and hardware may need different products. Follow the instructions for the installed components.

Should every visible part be oiled?

No. The instructions identify the appropriate points and lubricants. Some work is reserved for professionals; do not apply products indiscriminately.

Does a stiff handle mean the window needs replacing?

Not necessarily. Several causes are possible. Describe the symptom and seek an assessment before deciding on adjustment, repair or replacement.

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