How to install the door frame?

[Atom]

We are renovating a summer house. A bathroom will become a closet. The floor drain is gone. On this, we will just pour some leveling compound...

There is about a 22 mm glued-down chipboard floor...
NOT planning to tear it up.

The question is how the door frame should be mounted.
It's clear that the door should open outwards.

A thin laminate floor will be installed everywhere.
Should the frame be mounted after the floor is laid? Down to the lowest level?

We can cut and chisel away the small piece under the frame...

What do you think?

 

[Lenza]

I don't see the advantage of installing the frame after the floor is laid. I would prefer to calculate the final floor level and then attach the frame and threshold before the floor is laid. Laminate flooring should preferably not be under the threshold.

 

[kalle_lidköping]

When building new, we lay the floor first and then place the frame on top. The floor should extend under the frame for a neat appearance.

 

[Lenza]

When building new, we lay the floor first, then place the frame on top. The floor should go under the frame to make it look nice.

I suspected, of course, that there are those who advocate this variant. Personally, I'm actually a bit skeptical because:
1) The threshold can create pressure that causes the floor to be stressed, leading to unnecessary squeaking.
2) The floor becomes somewhat harder to replace in a room if a threshold stands on the floor.
Even if you're without a threshold, it can be good to have a joint to reduce tension in the floor between two rooms.
But please explain how the aesthetics override the above aspects, or suggest alternative solutions.

 

[lärjungen]

But if you install before the floor is laid, you will need some form of molding to cover the gap. Maybe not the worst problem, but a matter of taste. And not always so nice according to me.

Then it is also important that the door leaf does not end up too low so that it scrapes on the floor if you install the frame first.

 

[Atom]

I have tested both variants. It looks a mess if you lay the floor after the frame has been installed. Acrylic or silicone in floor color must hide the gaps. There will be a few, indeed.

The question is about the height. I think I'll cut out and remove the small piece under the frame and the door...

 

[Lenza]

Yes, the height is hard to go wrong with if you take a laminate piece under the threshold to get the frame at the correct height. That thing with gaps depends on how carefully the work is done, a small line of soft sealant near the threshold is what I would prefer.