Condensation in outer corner

[Karl-Ove Qvarfordt]

 

[Stene75]

Is it beneficial to supplement with insulating foam from the inside through the plastic if sufficient filling with mineral wool has not been achieved?

 

[Anonymiserad 405730]

In all corners (inner seen from inside) a geometric thermal bridge occurs, hence you get condensation first in the corners.
Use a dehumidifier.

Then it only gets worse as there are extra many studs in a corner…
Good illustration with the picture..

 

[Karl-Ove Qvarfordt]

Then it only gets worse as there are extra posts in a corner...
Good illustration with the picture...

Exactly, many posts also create a thermal bridge.

 

[Harey]

A silly question...
Will this phenomenon always occur during winter for me? So do I have to run a dehumidifier every winter or how should one reason to get rid of the problem and the geometric thermal bridge?

 

[Karl-Ove Qvarfordt]

A dumb question...
Will this phenomenon always occur for me in winter? So I have to run a dehumidifier every winter, or how should one reason to get rid of the problem and the geometric köldbrygga?

Nah, a bit later on you have ventilation and a dried concrete slab.

 

[Anonymiserad 405730]

A dumb question...
Will this phenomenon always occur for me in winter? So do I have to run a dehumidifier every winter or how should one reason to get rid of the problem and the geometric thermal bridge?

Probably not as long as you don't have pure thermal bridges in the walls..
If you dry out the house with a dehumidifier while you're finishing it. Once you're done, the supply and exhaust air takes care of the house...

 

[Harey]

Probably not as long as you don't have pure thermal bridges in the walls..
If you dry out the house with a dehumidifier while you're finishing it. Once you're finished, the air supply and exhaust will take care of the house…

Is there any way to check it at this stage? Thermal camera?

 

[Anonymiserad 405730]

Can you check it in any way already at this stage? Thermal camera?

Yes, a thermal camera works well, have you built the walls yourself?

 

[Karl-Ove Qvarfordt]

Not entirely easy to interpret what you see in the thermal camera. It can be difficult to determine what is one or several studs or if it is the absence of insulation.
Comparing the corners might be a way

 

[Anonymiserad 405730]

Not that easy to interpret what you see in the thermal camera. It can be difficult to determine whether it's one or more studs or if it's the absence of insulation. Comparing the corners can be one way

It sounds like this is part of your everyday life?

 

[Harey]

Not entirely easy to interpret what you see in the thermal camera. It can be difficult to determine what is one or several studs or if it's the absence of insulation.
Comparing the corners can be one way

Ok, but this is something that doesn't need to be considered at the moment then? Just put in a dehumidifier during construction, and then when the FVP is in place and the slab has dried there shouldn't be any problems?
But you mention the absence of insulation... could it be that there's a lack of internal insulation or do you mean external? If it's the external insulation in the framework that's meant, then this is a big problem and extensive intervention is needed... :/

 

[Karl-Ove Qvarfordt]

Ok, but this is something that doesn't need to be considered at this stage then? Just put in a dehumidifier during the construction phase, and then when the FVP is in place and the slab has dried, there should be no problems?
But you mention the lack of insulation... could it be that there is a lack of internal insulation or do you mean external? If it's the external in the frame, then this is a big problem and extensive work needs to be done... :/

The lack of insulation was mentioned by someone else earlier in the thread. I don't think that's the case.
Then the thermal camera was mentioned, I just pointed out the difficulty in interpreting what you see in it.

 

[Karl-Ove Qvarfordt]

I think you can buy a hygrometer, it's not too expensive. Set it up in a few different places in the house you're building. Then put it up where you live now and compare the relative humidity. Then you'll have a good answer on whether you need a dehumidifier.
Which I think you do.

 

[Utsliten och utdömd]

The moisture most likely comes from the material.
Nowadays, most skilled builders and designers are so aware of thermal bridges that it's probably not the problem. The same goes for the amount of insulation.

I think it's simply that air doesn't circulate as easily in the corners. This results in colder areas that aren't exposed to convection.

This won't be a problem at all once all the material has properly dried and you've adjusted the ventilation. I would avoid cladding the walls until the condensation stops, and if you want to continue working already, it goes much faster if you use a dehumidifier.