ᐅ Adding an Upper Floor to a Timber Frame House – Sequence of Construction Trades

Hello, I am a complete beginner in this entire field and would be very grateful for any help you can provide!

After completing all the appointments and having a rough idea of the costs involved, I now have questions regarding the sequence of work. Since my construction project is somewhat unusual, I’m not sure how much I can rely on Google search for this.

An extension is being added on top of an old timber-framed house, using a post-and-beam construction method and a concrete slab. The carpenter installs the slab (floor/ceiling slab) and erects the braced interior and exterior walls without insulation, then applies exterior render.

Now to my questions:
What other trades should I expect to be involved?
Are the windows installed before or after the rendering?
When are the pipes for gas, electrical, and water routed upwards?
Do any trades overlap with the carpenter’s work? If so, which trades?
When can underfloor heating be installed, and when is it recommended to lay the screed for it?
What needs to be completed to insulate the first floor and to close the installation cavity?
Is the screed applied only after closing the installation cavity?
From when can the bathrooms be installed (upstairs and downstairs), especially considering pipe routing up to the first floor? (The bathroom on the ground floor already exists and is only being updated as part of the renovation and pipe installation.)

Best regards and thanks in advance

Lacotto

To put it briefly, at least in my opinion, it would be wise to find someone who knows how to coordinate the various trades.

This is a task we would like to manage ourselves.
Therefore, the following questions arise for me.

These are very basic questions.
If you want to coordinate the trades yourself, you should be able to answer these questions on your own.
Otherwise, I agree with Sigi (@Neige).

In my experience, as well as from what I have heard from others who have tried this, I personally believe the project is doomed to fail because, based on your questions, it seems you don’t really know who does what, and when it needs to be done. With all due respect, this is going to go wrong. So you would definitely be wise to have a professional coordinate everything.

@Neige @Jochen104 I will, of course, discuss this with my architect and also my carpenter. You can also talk to the tradespeople. What is the typical sequence? That’s all I need to know for now.