ᐅ Drywall construction/hallway for wooden staircase to expandable attic space

We are building a solid bungalow with an attic that can be converted later. Originally, a insulated folding attic ladder was planned. However, we have now decided to install a quarter-turn wooden staircase to the attic right away, to ensure that building materials can be brought up properly later on.

Since the attic will be insulated and finished at a later stage, a small hallway with a door needs to be created in the attic. What is the recommended wall structure here, and which types of doors are suitable? At this point, there must be an airtight and insulated separation between the ground floor and the attic.

@Nordlys knows what to do!

Wall construction is similar to a wooden ceiling, with stud framing, plenty of Knauf insulation wool, a vapor barrier, gypsum board (drywall) facing the living area, and OSB boards facing the floor. For the door, use a patio door. It is airtight and lets in light from above. Our floor already has Velux windows, which can handle the temperature differences between the cold roof space and the warm living area.
So, ask Nordlys. He knows a lot about attics. That’s how it is.

Patio door, sounds interesting. Are there any pictures or a thread showing how the project was carried out?

Nordlys schrieb:
Vapor barrier, drywall (gypsum board) on the living area side, OSB panels on the floor side in our case.

Encasing the insulation on both sides with vapor retarders is generally not recommended because any moisture that penetrates has no way to evaporate.

On the other hand, I consider a patio door to be a practical idea. It should also be significantly cheaper than a multipurpose door with a drop-down bottom seal.

Where did I say there was double foil inside? I don’t have a photo of the patio door. But you know what a white patio door looks like. We had a wooden door for 5 months inside that was warped so much it was almost impossible to seal it properly. Then the general contractor said, no experiments. I’m installing a patio door now. Since then, it has been working. C