Rule inside old "brick shell"

[Novisfixaren]

Is an eaves projection of 300mm from the wall suitable for this "smaller" building?

 

[justusandersson]

Absolutely!

 

[Novisfixaren]

How do I most easily arrange ventilation in the space? A cold attic can have two grilles on the gable. The cold attic gable is not insulated, I assume? Just cladding boards? Wind protection? Frame the cladding boards directly to the roof truss?

Ventilation in the bedroom, just a supply/exhaust vent in the wall the simplest?

Bathroom exhaust fan or just a wall vent?

 

[justusandersson]

Normally, an attic is ventilated with grilles on each gable. Since it is a corner building, there is only one gable. What does it look like in the main part? The execution of the attic must be matched to the amount of insulation in the attic floor. A little insulation and windproofing are not wrong. This would never have been done in the past, but they also burned for the crows. You need to supplement the truss in the gable with studs at c/c 600 mm, so you have something to nail into. A motion-controlled exhaust fan in the bathroom + an air intake valve in the bedroom would be a good investment, provided that the air can pass under the intermediate doors.

 

[Novisfixaren]

Okay, the studs on the gable, do you attach them on the outside of the rafter or do you have to embed them between the tie beam and the principal rafter?

 

[justusandersson]

It is easiest to fold them in.

 

[Novisfixaren]

Probably will need to raise the window in the bedroom. Should the window be installed flush with the outer wall or is it better to have about 10cm reveal?

Is it sufficient to cover the inside reveal sides with fabric + plasterboard to cover the mineral wool, or do I need to brick or use leca in the cavity where the mineral wool is?

 

[justusandersson]

The main rule is that windows should be installed as close to the facade line as practically possible, among other reasons to avoid water intrusion. In your case, it depends a bit on how the facade looks right where you will have the windows. The inside of the window reveal can be covered with plasterboard, wood cladding, or plastered. It depends a bit on how the inside of the wall will be treated. Will you have a window sill? And if so, in what material?

 

[Novisfixaren]

I'm imagining a wooden window sill.

I would like the window to be 10cm in from the façade to give the window a little extra protection.

So is it enough with plasterboard to cover the mineral wool, I don't need to use Leca or bricks there to cover the mineral wool?

 

[justusandersson]

I think a 10 cm recess is way too much. It creates more problems than it solves. In brick walls earlier, the window was set a quarter stone in, i.e., about 6 cm. It's important to seal the joint between the frame and the wall opening and to have a proper flashing at the bottom.
The mineral wool in the wall does not need to be covered with leca or brick.

 

[Novisfixaren]

Thinking of polishing up against the window frame on the outside, right?

 

[justusandersson]

OK with plaster. Deep-set windows have no tradition in Sweden. It just looks odd, aside from what I've said about moisture issues. A different situation in southern Europe with lots of sun, etc.

 

[Novisfixaren]

Ok is 6cm in best or edge in can with the putsen?

 

[justusandersson]

It depends a bit on how the transition between the facade and the window niche looks from the outside. If it is a new opening that you have to create in the brick wall, place the window flush.

 

[Novisfixaren]

How do you do the exterior casing? You should probably cover the frame somehow, right?