Sealing around windows - afterwards

[Aneda]

Ok, but you probably won't be able to seal it 100% from the outside since it's hard to see the diffusion barrier from outside, and if you don't get it completely sealed, the idea falls apart.
If you want it sealed, you'll need to do it from the inside, even if it means a lot more work.
Personally, I wouldn't worry about the lack of a soft seal.

The diffusion plastic is visible when you remove the stuffing, so if you fill the gap with something suitable, you should be able to make it connect to the frame reasonably well.

 

[Aneda]

If it draws in air, then it is poorly packed..

Drev is not airtight, and that is poorly done.

 

[Anonymiserad 405730]

Drev is not airtight, and it is poorly done.

They are aluminum-clad wooden windows if I see correctly, to soft-seal 11.5cm in if it is 10mm in width will be difficult..
No, drev is not 100% airtight but if it is properly installed, you shouldn't be able to feel a draft...

 

[J Vos]

Negative pressure in the house tends to pull in both.

The air has to come from somewhere and will likely take the path of least resistance. It's worth considering the fresh air vents or settings on the fresh air fan.

 

[Aneda]

They are aluminum-clad wooden windows if I see correctly, to seal 11.5cm in if it's 10mm in width will be difficult..
No, the seal isn't 100% airtight, but if it's insulated properly, you shouldn't feel any drafts…

It's aluminum on wood, westcoast windows.
The thermal camera detects drafts!
But not between the frame and wall, also a lot between the frame and sash.

 

[Anonymiserad 405730]

It is aluminum on wood, westcoast windows.
The thermal camera detects drafts!
But not between the frame and the wall, also a lot between the frame and the sash.

How old are the windows?
What do the sealing strips look like?
Seems to be colder at the bottom than around the sides...

 

[Aneda]

How old are the windows?
What do the sealing strips look like?
It seems to be colder at the bottom than it is around the sides...

8 years old.
There is the same tendency on all the top-hung windows in the house it seems.
No noticeable fault with the sealing strips. Maybe the windows should be adjusted so that they press slightly more on the strip?

 

[Karl-Ove Qvarfordt]

Sounds easiest. Any downside to foam sealant? Feels like it has a bad reputation for some reason.

Can be sticky.

 

[Anonymiserad 405730]

8 years old.
It seems to be the same tendency on all top-hung windows in the house.
No noticeable fault on the sealing strips. Maybe the windows should be adjusted to press a bit more on the strip?

Have you opened up under the window? Because it looks like it is not insulated at all at the bottom or there is a construction mistake of some kind...

 

[Aneda]

Could be sticky.

Sounds manageable in that case.

 

[Aneda]

Have you opened up under the window? Because it looks like there is no insulation at all on the underside or that there is an error in the construction somehow...

I haven't removed the drip edges on the windows. But under the balcony door, there is packing, but no sealing, so I assume it's the same with the windows. The aluminum profiles on the outside of the windows are really completely open, so the only thing sealing against the cold is the wooden frame and packing outside the frame.

 

[Anonymiserad 405730]

Have not removed the drip edges on the windows. But under the balcony door there's insulation, but no sealing, I assume it's the same for the windows. The aluminum profiles on the outside of the windows are actually completely open, so the only thing sealing against the cold is the wooden frame and the insulation outside the frame.

Is there only a single layer of loose insulation?
Or is it packed with two 100mm wide insulation strips as it should be?

 

[Aneda]

Is there just one layer of loose drev?
Or is it packed with two 100mm wide drevremsor as it should be?

One drevremsa, plastic-coated.

 

[Anonymiserad 405730]

A sealing strip, plastic-coated.

There you have the problem, the plastic-coated sealing strips are not airtight.
My recommendation is to make a test window by sealing properly, that is, 2pcs of 100mm wide strips all around and then measure...

 

[Aneda]

There you have the problem, the plasticized sealing strips don't become airtight.
My recommendation is to make a test window by sealing properly, i.e., 2 pieces of 100mm wide strips all around, and then measure...

The plastic might instead lead in cold air? Yes, not impossible. Doesn't hurt to try. But it won't become vapor-tight.