Renew windows / Is the offer fixed or negotiable?

Addendum: Test your window maker with the following...

DIN 1946-6 states that for all new buildings or renovations where more than 1/3 of the windows of the building are replaced, or in single-family houses where more than 1/3 of the roof area is sealed, a ventilation concept must be created.

Windows? No way from Poland.

Ok. Then you must have had bad experiences. For almost 20 years I have only been getting windows from Poland (installation either by myself or by specialist companies from Germany). I have never had any problems. Also, the contact with the producer was always very good. Interior doors preferably from CZ. Sapeli - great manufacturer.

What window sizes?
Which installation locations in the house?
Price including installation?
Price including removal and disposal?
How is the installation carried out?
Mullions inside or attached outside?
What does soundproof glass mean?
Which fittings, number of mushroom head locks, RC class?

Window sizes are listed above, approx. 130x95cm.
Price includes delivery, removal and installation as well as disposal.
Mullions are inside, as currently as well.
No fittings are specified for the windows; for the balcony door it says: Siegenia TITAN AF.
Since the windows are on the first floor, we said that we do not need a special RC class. I therefore assume "standard."

One can say very little about your offer. I would only assume the following:
- with the surcharge it does not matter whether normal or soundproof glass
- installation will be 100% defective
- soundproofing is not only about the glass. Installation is extremely important

How do you come to the assumption that the installation will be 100% defective?
Yes, for soundproof glasses there is a special soundproof installation.
Why should it not matter which glass is used with the surcharge? I do think that soundproof glass makes a difference.

What is "little heating"? With 25-year-old, leaky windows and cozy temperatures (20-22 degrees throughout the house), that is physically not possible.

The energy certificate of the house shows a value of approx. 80 kWh/(m²·a).
We only heat the living and dining rooms as well as the kitchen with the fireplace, in the bathroom with heating. I would have to check, but our gas consumption is extremely low for the living area.

That is no problem for anyone – only the question is whether inside or glued on. The window manufacturers buy the glass anyway from European companies. You get German profiles with French glass delivered to Germany from a Polish company. 600€ surcharge for 12x soundproof glass is initially a joke (price-wise). Or, as the saying goes, "you get what you pay for."

In the end, the manufacturer of the windows should be completely irrelevant to you (Poland obviously has a problem with warranty cases...). What you should be interested in is the person who carries out the installation. That is where the quality ultimately takes place.

As said, inside. The German manufacturer says it is not a problem; with the Polish manufacturer, double glazing including soundproof glass is not possible.
As mentioned, this is an experienced window fitter who made a better impression than one or the other carpenter. He was also the only one who told us about a "soundproof installation."

Then you are probably a major customer and are treated differently in Poland than the typical German walk-in customer? That should not be underestimated.

Poland especially has a problem regularly but not constantly with quality in general and/or consistent quality over a period X. You can be lucky or very unlucky. And then good luck if you are lucky enough to have a German outpost that tries to help... or if you have to talk directly with a Polish person who speaks German very poorly in Warsaw...

I would not buy in Poland. Instead, normally through the window manufacturer with the same Veka profiles as with the German manufacturer. Delivery, installation, warranty, etc. are exactly the same as with the German window manufacturer.

I didn't buy my mirror in Poland either, but from a German outpost in the Ruhr area. The idea that it was manufactured in Poland only occurred to me when it arrived 16 days after delivery via DHL Express, with about 6 stops in Poland... and when I inquired, all emails were answered in... let's say simple German with an email address ending in .pl ;)

I am sharing my experiences with work from Eastern Europe. Nothing more, nothing less. There are certainly people who were very satisfied, no question. The biggest problem you have is only when it comes to warranty or damages... when the window is leaking and your house is flooded during the first heavy rain. Then the clever window maker refers you to the manufacturers in Poland... and then... good luck...

The biggest problem you have is only when it comes to warranty or damages... when the window is leaking and your house is flooded during the first heavy rain. Then the clever window fitter refers you to the manufacturers in Poland... and then... good luck...

Now, this should not get out of hand here, but that is wrong. The window fitter is your contact and not a manufacturer in Poland. I have nothing whatsoever to do with the manufacturer in Poland. The window fitter does not refer you to the German manufacturer either if the windows are leaking.