Holz offers full after-sales customer support!

The modern production methods of wooden doors and window frames ensures their excellent quality and their unsurpassed durability through time. New varnishing methods have advanced considerably, so that wooden doors and window frames can remain forever pristine through simple care and cleaning. Through the years, however, dust, smoke and other pollutants accumulate on any exterior surface, something which can be particularly harmful to the finish on wooden surfaces if not cleaned off regularly. The cleaning of wooden surfaces should be done using special cleansing liquids, which are offered free of charge by Holz. It is worth noting that Holz offers complete customer support for all its products in case of wear and tear.


  1. This should be done four times a year on average, or more frequently if located in a coastal setting or one exposed to a high level of atmospheric pollution.
  2. Cleaning is done from the top down to the bottom of surfaces.
  3. Dust is removed using a simple soft nylon-bristled brush (a household broom will do).
  4. Preferably, cleaning of varnished wooden surfaces takes place at times when not directly exposed to sunlight.
  5. Cleaning of exterior surfaces and especially of connective elements (corners) should take place once a month.
  6. Components such as door knobs and mechanical parts (hinges etc.) should be cleaned as frequently as needed using domestic detergent.

Whether surfaces are varnished or lacquered, special liquids and cleansing agents offer not only protection, but also freshen up the colours by giving a new shine to windows. Through regular use (once a year), they not only extend the intervals between cleaning, but also increase the total lifetime of windows.


1)Clean varnished surfaces with special cleaning agents.

2) Spread the cleaning agent evenly with a sponge.

We wish you full enjoyment of the high-quality windows you have purchased.


You can participate actively in the preservation of a pleasant atmosphere in your home, for example, through regular ventilation. Many everyday household activities, such a showering, cooking, clothes washing etc., raise the humidity levels inside the home. What’s more, the human body itself produces moisture, on average a litre throughout the night. This moisture, if not removed, has a negative impact on the interior microclimate of the home. It not only affects wellbeing, but hides other particular threats. For effective prevention of fungal spread – for example, on wooden window frames – regular ventilation is recommended with as many windows open as possible. This should be done in winter three times a day for six minutes and at other times of the year for ten minutes.

παράθυρα κυκλικά