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Our added value

Good products alone are not enough for us. We attach great importance to good service: starting with an individual consultation to the installation of all windows and doors by our qualified teams. However, the tasks for us are far from being fulfilled with the installation. Our exclusive maintenance service, which we are happy to offer our customers on request, carries out regular and professional control and care activities. And for all operations in between, we have our own in-house customer service.

Would you like to hear more about our products and our maintenance service? Then simply contact us – by mail, contact form or call us!


Maintenance service

No doubt you want to enjoy the natural beauty of your windows and doors from OST. For this reason, we offer you our maintenance service. At regular intervals, our customer service will carry out a professional fitting, seal and surface check. This check includes a professional function test, oiling and, if necessary, regulating the fittings, checking the seals and sealings as well as a general surface check with light care or retouching if necessary.

  • if maintenance is wished for windows plus a house door, the door counts as much as two additional windows
  • prices for more than 35 windows on request
  • the first date of maintenance in compliance with the contract must be carried out at least 1 year after the free maintenance or a chargeable initial inspection of the elements
  • in the case of price increases, the prices indicated are subject to change without notice
  • our maintenance service ist exclusively for OST products only!
NumberServiceFixed feeTotal w/o VATTotal incl. VAT
1 front door only59,79 €12,00 €71,79 €84,00 €
1-5 windows59,79 €12,00 €71,79 €84,00 €
6-10 windows85,44 €12,00 €97,44 €114,00 €
11-15 windows105,09 €12,00 €117,09 €137,00 €
16-25 windows120,48 €12,00 €132,48 €155,00 €
26-35 windows146,12 €12,00 €158,12 €185,00 €

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