Hello,
we want to replace the windows in a timber frame house—12 windows plus 1 balcony door. The current windows are 25 years old. Apparently, there were significant installation errors: the windows are not properly sealed or secured. As a result, it is quite noisy inside. Because of the close proximity to a street, you can hear every passing vehicle.
While searching online, you naturally find many affordable window suppliers. But without installation, that wouldn’t help. One online supplier offers installation services through local companies. We also obtained a separate quote from one of these highly rated local window companies, independently of the online supplier. The on-site consultation from three companies (1 window installer, 1 carpenter, 1 installation service) was by far the best and most professional from the local window company.
The windows currently have double glazing. We would probably stick with that. We already heat very little despite noticeable drafts around the windows and sills in winter, so I don’t see any advantage in triple glazing here.
The German window supplier offers Veka SL76 MD profile, white on white, insulated glazing with a U-value of 1.1 W/m²K (U-value 0.19 Btu/h·ft²·°F), with muntins, window dimensions about 130 x 95 cm (51 x 37 inches), and a standard balcony door. The price is about 12,200 euros. With soundproof glass, it is about 12,800 euros.
Alternatively, instead of the German supplier, the same local company offers Oknoplast windows with the same Veka profiles for about 1,000 euros less. According to Oknoplast, soundproof glass is not possible with muntins, whereas the German supplier can provide this without issues.
What do you think of this offer? Since we lack experience, are these prices usually fixed, or is there room for negotiation? Honestly, we had expected somewhat lower prices since there is no “extra” installed—just standard windows.
Best regards
we want to replace the windows in a timber frame house—12 windows plus 1 balcony door. The current windows are 25 years old. Apparently, there were significant installation errors: the windows are not properly sealed or secured. As a result, it is quite noisy inside. Because of the close proximity to a street, you can hear every passing vehicle.
While searching online, you naturally find many affordable window suppliers. But without installation, that wouldn’t help. One online supplier offers installation services through local companies. We also obtained a separate quote from one of these highly rated local window companies, independently of the online supplier. The on-site consultation from three companies (1 window installer, 1 carpenter, 1 installation service) was by far the best and most professional from the local window company.
The windows currently have double glazing. We would probably stick with that. We already heat very little despite noticeable drafts around the windows and sills in winter, so I don’t see any advantage in triple glazing here.
The German window supplier offers Veka SL76 MD profile, white on white, insulated glazing with a U-value of 1.1 W/m²K (U-value 0.19 Btu/h·ft²·°F), with muntins, window dimensions about 130 x 95 cm (51 x 37 inches), and a standard balcony door. The price is about 12,200 euros. With soundproof glass, it is about 12,800 euros.
Alternatively, instead of the German supplier, the same local company offers Oknoplast windows with the same Veka profiles for about 1,000 euros less. According to Oknoplast, soundproof glass is not possible with muntins, whereas the German supplier can provide this without issues.
What do you think of this offer? Since we lack experience, are these prices usually fixed, or is there room for negotiation? Honestly, we had expected somewhat lower prices since there is no “extra” installed—just standard windows.
Best regards
rennschnecke schrieb:
It only surprises me that Oknoplast says soundproof glazing with internal muntins isn’t possible, while TMP says it’s not a problem. One seller focuses on sales, the other on minimizing complaints. Internal muntins are, of course, also thermal and sound bridges. Personally, if I were replacing windows, I wouldn’t replicate the style that was fashionable at the time exactly.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
R
rennschnecke30 Sep 2025 11:1611ant schrieb:
Personally, I wouldn’t choose the style that was popular back then if I were replacing windows.In this case, there is no alternative because only the windows on the first floor (1st floor) are being replaced, so the muntins on the ground floor will remain. To maintain the overall visual appearance, the muntins have to be included again.rennschnecke schrieb:
The windows were installed during the house construction by a local master carpenter, whose business still exists today (now in its second generation). This leaves it unclear whether the windows are wooden...
rennschnecke schrieb:
For this property, there is no alternative since only the windows on the first floor are being replaced, so the muntins on the ground floor will remain. To maintain the overall visual impression, the muntins need to be reinstalled. ... if they are wooden, vinyl windows would clearly look noticeably different.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
R
rennschnecke30 Sep 2025 17:3711ant schrieb:
It remains unclear whether they are wooden windows...No, they are standard uPVC windows.
In der Ruine1 Oct 2025 06:55nordanney schrieb:
Addendum: Test your window installer with the following...
DIN 1946-6 states that for all new constructions or renovations where more than one-third of the windows in the building are replaced, or in single-family houses where more than one-third of the roof area is sealed, a ventilation concept must be developed. DIN standards are not mandatory and do not have to be implemented as a rule. It only becomes critical when authorities adopt and require them by law.
N
nordanney1 Oct 2025 07:29In der Ruine schrieb:
DIN standards are not mandatory and do not have to be followed.No. However, the Building Energy Act legally requires you to maintain a minimum air exchange to protect health and prevent moisture damage. This can only be ensured by following the recognized rules of technology, which can only be met by complying with the DIN standards. Therefore, what is originally a non-binding standard effectively becomes a legal obligation, since the Building Energy Act compels you to adhere to it.
If mold appears after the replacement, this chain becomes a problem.
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