Zero-energy Attefall. How would you have done it?

[Rabbithole]

It depends on what you want to achieve; if it's going to be a passive house, I find it hard to see that a standard door would work. What do you mean by centralized house layout and how do you do that with an attefallshus?

Clearly unnecessary to go with a standard door (U=1.2 type) if nothing else, when there are better options. You can also build a vestibule and airlock.

A centralized layout is just so you get the most usable floor space inside relative to how many square meters of floor/ceiling/wall there will be. In principle, a cube, but it can be difficult to utilize the width optimally if it exceeds a certain size.

 

[witten]

If you had followed the thread you would know that we are talking about a load-bearing timber wall on the exterior and internal insulation.
Then it won't topple over during a storm regardless. It depends on design and total mass. If you have it sealed at the bottom, there’s not much the wind can lift from. We're not talking about a caravan here.

I haven't followed the thread at all but it is a questionable foundation method regardless.

 

[Rabbithole]

I have not kept up with the thread at all but it is a questionable foundation method regardless.

It is not a foundation for the building but more of a floating interior floor. It is not strange in any way as it is the same basic principle as a decoupled slab, just that the slab is a wooden construction instead of concrete.

 

[Rabbithole]

I think the thread needs some pictures for the discussion

 

[Elegi]

It's clearly unnecessary to go for a standard door (U=1.2 type) if nothing else when there are better options. One can also build an entrance hall and airlock.

A centralized layout is just so that you get the most usable floor space inside relative to how many square meters of floor/ceiling/wall it becomes. Essentially a cube, but it can be difficult to optimize the width if it exceeds a certain size.

Building an entrance hall in an attefall house, how does that help? The purpose of an entrance hall is to block cold outdoor air when doors are opened and closed frequently, not to compensate for a poorer door. The building envelope boundary still goes at the exterior door.

Oh, you mean form factor. Yes, that's obviously important, but an attefall house usually has only four corners already so I find it hard to see any improvement that would compensate for a poorer door.

 

[Rabbithole]

Building a windbreak in an "attefallshus", how does it help? The purpose of a windbreak is to keep out cold outdoor air when doors are opened and closed frequently, not to compensate for a poorer door. The climate barrier is still at the outer door.

Oh, you mean form factor. Yes, of course, it's important but an "attefallshus" usually only has four corners so I find it hard to see any improvement that would compensate for a poorer door.

Absolutely.

A windbreak reduces the cooling effect around the area which gets more still air. Now it's super easy to insulate an outer door so maybe a dumb example. You should have a windbreak regardless, and an airlock isn't a bad idea, e.g., an unheated hallway/conservatory.

Roof overhang also reduces nocturnal radiation, noticeable if you look at condensation/frost on the outside of energy-efficient windows or park the car in a carport. Maybe it doesn't do much in total, I've never measured it.