New front door, who performs the sealing of the threshold?

Hello everyone! Our renovation is in full swing and last week the new front door arrived. It already looks good. During installation, the sides and the top inner edge were sealed airtight to the masonry. However, the threshold is causing me some headaches. Under the threshold, there is simply nothing except a few spacers. The installer said, logically, you should not step on it as long as these spacers are there and that concrete/screed should be poured underneath soon to make the threshold "walkable." Now I’m wondering: Is it correct that I have to take care of this or is it the installer’s/company’s responsibility? It was sealed on the sides and top, but just not at the bottom. Thanks in advance for the responses... Best regards

What a coincidence, today my new front door was installed. I haven't been able to see it in person yet, but everything was sealed and completely finished there since I already live in the house.

Whether this is normal, I can’t say at all. Personally, I wouldn’t be interested in pouring something like that. If you have never done something like that before, it’s a guarantee that something will go wrong. Afterwards, it might bulge up and the door won’t close anymore because the wrong material was used.

What I actually wanted to ask: The floor in the house also looks pretty scratched up. Who takes care of this part, can that craftsman also do the underfilling? Maybe your tiler?

So, by now you should have seen your new front door. How does it look there? The tiler can of course do that as well. He gave me the suggestion to have the "sealing" of the threshold checked and whether it might be the responsibility of the installation company. In the meantime, I have communicated with them, and a thermal break of wood (is that how it’s done?) will be installed under the threshold and a permanently elastic joint will be created in the exterior area. I’m curious...

The threshold was supported and screwed at several points and the rest was foamed. However, the cavity was only 1-2 cm in my case, as far as I can see in retrospect.

On the outside, the threshold fits nicely on the old floor or the old door construction in some way. It looks very clean and tight.

On the inside, the new tile covering must be properly slid underneath. The tiler was there briefly during the installation to discuss the correct height.

I am impressed that the installer managed to remove the old door and install the new door without damaging the facade or the already wallpapered interior walls. I assume that he also worked cleanly and carefully in the lower area.