1970s house, replace aluminum windows / help / opinions

Hello,

I am usually a silent reader because I do a lot myself in our house.
A little about me, I am 28 years young and bought a 74 [Bungalow] 1 1/2 years ago. So this year the old aluminum windows had to go because they let in a lot of cold.

Alright, on the recommendation of a colleague, I decided on a window fitter (he apparently mostly does new builds, like with my colleague).

Setting aside the work attitude of the craftsmen, I just wanted to ask if this is the 'norm'. For your information, they didn’t meet their schedule and will come back in the next few days for the patio door and the trimming, sealing, and insulating the roller shutter box, which was simply forgotten until I mentioned that it should be insulated. This is contractually agreed.

Here specifically the connection to the windowsill, will probably be sealed with strips?



And just seen here, the strips to the windowsill are probably already coming off, so theoretically water could get in unhindered there


And here the strip on the outside is also already slightly coming off, and I looked directly inside, you can see up to the inner strip, accordingly poorly foamed? Who knows how it looks under the others.

Please don’t tear me apart, it’s a professional company, a self-employed master carpenter. And since the windows were replaced in an old building, no sealing tape is used inside and outside. Outside, rainproof with the strips and additionally silicone? And inside as well?

One can guess that it had to be done quickly. I think it will be "visually sealed," with strips and a lot of silicone. Not much more is to be expected there. I hope no standing water forms in front of the window.

That is frustrating, the boss is coming this week then everything will be discussed and [fir mängel] that I see as a defect. I don't trust the strips with the double-sided tape. If that comes loose, water will get in.

I have something again where I could use some advice.

Yesterday they were finally back and did the remaining work, adding trim and sealing.

So the guys wanted to finish for the day and I pointed out some expanding foam on 2 windows to them.
They scraped it off roughly from the windows with a utility knife and measuring tape, and then since it wasn’t gone yet, they used some kind of cleaner, but he already told me that if he uses too much, the white will show through afterwards.

He said he was finished, but there was still some visible, so he kept scrubbing. The end result looks like this.
See attachment.
You can clearly see how smooth the area was scrubbed and you can see that the expanding foam has embedded itself – it has already been on the window for 4 weeks.

It’s the same on a basement window.
The boss was here today and I showed him all the defects. 2 windows will be replaced because the manufacturer apparently had damage to the film. However, he said the window with the expanding foam will not be replaced and he also won’t refund the full price. We’d have to come to an agreement.
Oh yes, in the meantime he tried to convince me that a wider trim piece could be stuck on, but it would then be flush with the water drainage cover and even that would not be sufficient.

What do you think? Can you insist on getting it replaced?

I’d really appreciate some information.