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

[oliven1]

Well. It's not that critical. A low-story building with solar panels can easily become plus-energy.

But I agree otherwise that it is important to build a well-thought-out climate shell with minimal thermal bridges.

Yeah, but I think it's easier said than done.
Most people have no idea how to build and minimize thermal bridges.

I've seen all sorts of strange constructions, even passive houses/zero-energy houses in the shape of a U.

 

[fribygg]

have seen all sorts of strange constructions, even passive houses/zero-energy houses in the shape of a U

Well, the TS is showing a picture of a rectangular house, which isn't too bad; obviously, a square house would be more efficient but perhaps more difficult to combine with the Attefall rules?

 

[oliven1]

Well, the TS shows a picture of a rectangular house which is not so bad, of course, a square house would be more efficient but maybe harder to combine with the Attefall rules?

Yes, but on the other hand, he shows a log house which would never work.

 

[Ulltand]

jo men å andra sidan visar han ett timmerhus vilket aldrig skulle fungera

Why wouldn't a timber frame work? With 250 mm PIR on the inside, I think it would be equivalent to 500 mm mineral wool. You write that regular materials work just as well, and that's true if you disregard the area loss in the house. 15 sqm inside and 24 sqm building area.

 

[Rabbithole]

One can build a passive house wall and clad it with timber as a facade.

The floor plan is important. A good space-efficient floor plan allows for building a smaller area while planning it in such a way that the envelope surface is minimized.
1, 1.5, 2, or 3 floors depending on size

 

[fribygg]

well, on the other hand, he is showing a log house which would never work

What do you mean?
Of course, a log house can work, but it's hardly the natural easy choice if you want to build an attefallare as a Zero Energy House since the living space would suffer.

 

[oliven1]

Why wouldn't a log frame work? With 250 mm PIR on the inside, I think it would be equivalent to 500 mm mineral wool. You write that ordinary materials work just as well, and that's true if you disregard the loss of area in the house. 15 sqm inside and 24 sqm building area.

sure, everything works of course, but it should also be reasonable.
then you could just ignore all construction techniques and build really poorly, just have a bunch of suspenders and belts so you'd manage anyway.

what are you going to have inside the PIR insulation then?
a 45 frame?

 

[oliven1]

What do you mean?
Of course a log house can work, but it is hardly the natural simple choice if you want to build an accessory dwelling unit as a Zero Energy House since the living space will suffer.

Of course it's possible, but it's unreasonable especially for accessory dwelling units but also common.

 

[fribygg]

of course it's possible, but it's unreasonable, especially for attefallare, but also common

yes, but on the other hand, he shows a log house, which would never work.

Now you're contradicting yourself.

 

[Ulltand]

Sure, everything is possible, but it has to be reasonable too.
Then you could skip all building techniques and build really poorly, just have a lot of suspenders and belts and still manage.

What are you going to have inside the PIR insulation then?
A 45 frame?

Why would I ignore all building techniques just because I use PIR? First, you say it can't be done, then you say it can but would be awful. Have you tried designing such a solution? Seen lots of failed constructions with PIR and wooden facades? I'm not saying it definitely works, but I find it hard to see why it wouldn't.

 

[oliven1]

Now you're contradicting yourself.

???

I was obviously exaggerating when I said it would never work.
Everything is possible but it's completely unreasonable.

Log houses have so many built-in thermal bridges that you still have to build a passive construction inside the logs, so the logs will practically only serve as something aesthetic as cladding.

There is no advantage in building with logs.

 

[oliven1]

Why would I disregard all building technology just because I'm using PIR? First, you say it's not possible and then that it is possible but becomes bad. Have you tried designing such a solution? Seen lots of failed constructions with PIR and wooden facades? I'm not saying for sure that it works, but I find it hard to see why it wouldn't.

what function does the timber serve when you have to build an entire passive house construction inside?

Instead, use the cm the timber adds for something that contributes to the house's function.

 

[fribygg]

I obviously exaggerated by saying it would never work.

Stop doing that, it doesn't contribute anything constructive.

 

[Jochi]

I'm considering this cabin as the basis for the project. Halvtimmer or whatever it's called allows for the frame to be erected quickly and built on as you go.

[image]

I would never choose a house like the one in the picture, called halvtimmer..
It absorbs moisture inside. Exterior walls and frame are the same thing. When the exterior wall is shot and needs to be replaced, the whole house is gone.

 

[Ulltand]

Log houses have so many built-in thermal bridges that you still have to build a passive construction inside the log so the log will practically only serve as something aesthetic as cladding.

Of course, a 250 mm construction with PIR on the inside is necessary if you choose that.

I was thinking the log structure would support the roof and serve as the facade. This house, if it comes to fruition, will be near a main building made of logs.