ᐅ Window Seal Replacement Defective?

Good morning,

we had the joints of our wooden windows renewed and noticed that something was cut off, see the first photo. Is this a big issue?

In the second photo, there is still an existing joint (inside). Should this be renewed, or is the black substance mold?

Regards

The first picture is completely blurry, and I can't make out anything.
Photo 2: Black sealing material? That’s how every new (plastic) window looks in my house. Nothing more can be seen. Sorry.

I have attached another photo. It concerns the white area between the silicone seal.

Regarding photo 2: That is actually a gray silicone seal, but I’m uncertain whether it is just dirt or something more serious.

Here is the photo again.

Your pictures show too little context. By "joint," you apparently mean the sealing of the panes to the wooden frame.

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Honestly, these spots don’t look optimal. If something has been cut off at the edge seal, it can become problematic over time because that is exactly where the glass insulation protects against moisture and air. If this is damaged, condensation can eventually form between the panes – it might not happen immediately, but it’s definitely not ideal.

Regarding the dark spots: they could simply be dirt or discoloration due to aging, but it wouldn’t hurt to clean the area thoroughly and monitor whether the spots change or reappear. If it turns out to be mold (which is hard to tell clearly from the photo), that would rather indicate consistently high humidity or insufficient ventilation – so keep an eye on that as well.

If you are going to renew the seals anyway, I would recommend having the frame and panes checked at the same time, so you don’t have to deal with it again in a couple of years.

Best regards