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TRUSTAV installation

Window and door installation from preparation to handover

The replacement is carried out by our own installers. We agree the course of the work, the preparation needed and the date with you in advance, so you know what to expect during installation.

  • Our own installers We are responsible for the quality of installation
  • Up to 7 windows a day Under standard installation conditions
  • Usually 2 days Replacing the windows in one apartment
  • Installed from the inside The main work takes place inside the building
Montáž oken

Precise installation is the highlight of the whole service – we can also help you obtain a grant and handle a large contract for an entire housing cooperative or owners’ association.

How window replacement works

From covering the interior to taking away the old windows. Before we start, we agree the scope and sequence of the work together.

  1. 01.

    Covering the interior

    We prepare the work area and cover the floors and furnishings around the windows. The extent of protection is adapted to the conditions in the apartment.

  2. 02.

    Removing the original windows

    We take out the original windows with care for the surrounding structures and prepare the openings for the new ones.

  3. 03.

    Fitting the new windows

    We set, anchor and seal the new windows. We check opening, closing and the adjustment of the hardware.

  4. 04.

    Making good and finishing

    We carry out the agreed making good around the windows and the finishing work. Its scope is confirmed before installation begins.

  5. 05.

    Cleaning the work area

    We clean the area where the installation took place and remove any leftover material.

  6. 06.

    Removal and handover

    We take away the removed windows and related waste. At handover we show you how to operate the new windows and explain basic maintenance.

See installation in practice

The videos show how window replacement goes, so you can see in advance what installation in your building involves.

  • Výměna oken v bytě

    Replacing windows in an apartment

  • Osazení špaletových oken

    Fitting casement windows

  • Začištění a předání

    Making good and handover

4.8/5

Our work through our customers’ eyes

Read all reviews
  • Trustav is a textbook example of how a successful company should work: from the first contact with the lovely owner to the final installation of complex wooden windows in a historic building, everything went in a professional and exceptionally pleasant atmosphere, to our complete satisfaction. I recommend Trustav without the slightest hesitation.

    Jana Budinská

    18. 2. 2026

    Translated from Czech

  • Very satisfied – a professional approach, speed, quality. Recommended!

    Jaroslav Hrabák

    17. 2. 2026

    Translated from Czech

  • Dear Director, on behalf of myself, my family and the other co-owners, I would like to thank you for replacing the courtyard box windows in 2023, and the box windows and balcony units in 2025, in the apartment building at Šmilovského 1495/4 in Prague 2, Vinohrady. In particular, I would like to thank Mr Syrový for his approach and conduct: already during the tender he convinced me of your company's reliability and quality, and he confirmed it in his approach, his dealings and in securing all the work. I would also like to thank all your staff who removed the old windows and installed the new ones, as well as Ing. Koc, Ing. Šetele and Mr Veselý, who managed the replacement. Your company proves that even today a Czech firm can deliver solid, honest, high-quality products and work to its customers. Thank you. With kind regards and respect, Ing. Miloš Jiřikovský, majority co-owner and building manager

    Miloš

    11. 2. 2026

    Translated from Czech

  • We had the ancient box windows in our small apartment building replaced – after all those decades they were held together by sheer willpower. The Trustav windows look great and there are no draughts any more. You can see honest craftsmanship in them, and the company was pleasant to deal with as a bonus. I can only recommend them. David Železný

    Dave Steel

    8. 6. 2026

    Translated from Czech

  • I was very glad they were willing to come up with a non-standard design and fixing, including fine-tuning the details. Quality and speed. I can warmly recommend them.

    Emily Polanská

    19. 5. 2026

    Translated from Czech

  • I would like to take this opportunity to thank Trustav for the thoroughly professional work on replacing the box windows during the renovation of our flat. From the very first contact it was clear that they deal fairly and have extensive experience with this type of work. I especially appreciate the very helpful communication, their willingness to advise and their patience in sorting out every detail of the job. The work itself was done quickly and exactly to the agreed schedule. The new box windows look truly beautiful and fit the character of the building perfectly. We were also very pleasantly surprised that Trustav kept exactly to the price agreed in advance, without any hidden extra costs or unpleasant surprises. Sadly, that is more the exception than the rule these days, which makes us value it all the more. Overall, I have to say we were completely satisfied in every respect – the quality of the work, the speed, the communication and the professional approach were all first-rate. We can recommend the company with a clear conscience to anyone looking for a reliable supplier of box windows who wants to be sure the job is done well. Thank you once again for the excellent cooperation!

    Max Bauer

    18. 5. 2026

    Translated from Czech

  • An amazingly client-focused approach – they explained everything to me in detail and I am absolutely satisfied 👍

    Adam Nehasil

    14. 4. 2026

    Translated from Czech

  • Completely satisfied!

    Kristina Hotova

    13. 4. 2026

    Translated from Czech

  • Thank you, highly recommended! 👌

    Lenka Fialová

    13. 4. 2026

    Translated from Czech

  • Thanks for the cooperation, great 👍

    Andrea Lacina

    12. 4. 2026

    Translated from Czech

  • Trustav did truly exceptional work. The replica wooden windows in our 1902 school building are beautiful, finely detailed and fully respect the original historic appearance. The result exceeded our expectations – the windows look authentic and elegant and fit naturally into the architecture of the whole building. Slim wooden frames, replica brass handles, wooden sills and a superb colour finish that brings the historic building to life. At the same time they are fully functional and meet today's technical standards. In the classrooms and the school corridor we feel a huge difference in thermal comfort – the ice-cold classrooms have become pleasantly warm rooms! A professional approach, craftsman's precision and a feel for history make Trustav a true specialist in listed buildings. We were also very happy with the installation of the windows and the great cooperation with all the craftsmen. Thank you – we recommend them without reservation.

    Kateřina Vávrová

    10. 2. 2026

    Translated from Czech

  • Thank you for the great cooperation – I highly recommend Trustav!

    Adéla Ficek

    10. 2. 2026

    Translated from Czech

What to prepare before the installers arrive

Clear space and agreed access help the work start smoothly. We will go through the specific preparation with you in advance.

  1. (01) Clear access

    Make sure there is access to the apartment and to each window. If windows are being replaced in several apartments, arrange access with the residents.

  2. (02) Space around the windows

    Clear the window sills, take down curtains and move furniture out of the work area. We will tell you in advance how much space is needed around the windows.

  3. (03) Arrival and parking

    Talk to us about parking the installation van at the building. Let us know about any access or unloading restrictions.

Before we start, we always confirm access to the windows, protection of the interior and the scope of finishing work. That keeps installation running smoothly and without unnecessary delays.

Vedoucí montáží Marek Dvořák Head of installation

Do you like our work? Please contact us.

Leave us your details and we will get back to you. We will go through your enquiry and tell you what we need in order to give you an indicative price.

Enquiry

Do you have photos of your current windows or doors? You can upload them here, or simply send them as a reply to the confirmation e-mail you will receive after submitting.

What you ask us most often