Too large cut-out hole for supply ventilation? Fill with putty?

[goldfish1977]

The previous owner had cut out a hole that was too large for the supply ventilation by the windows, which makes the air supply devices a bit loose. Is it possible to use filler to "reduce" the hole, or should something else be done?

 

[Noseone]

A picture would have fit here....

 

[cecar33]

The pipe should be sealed against the vapor barrier in the wall, then you can apply filler with suitable spackle.

 

[goldfish1977]

cecar33: How do you usually seal against the vapor barrier? As it looks now, it's just drilled straight through... See the picture below. Grateful for tips.

Noseone: Now I'm attaching two pictures



Even against the outer wall it seems to be too big of a hole, but it's mainly against the inner wall I plan to fix now so it doesn't gap, as well as possibly the sealing against the vapor barrier.

 

[Barnrikehuset]

Hi!

Is there any plastic there somewhere? I think I glimpse something behind the plasterboard. Then maybe you should try to seal between the pipe and the plastic (though I don't know how when it looks like that, I assume you have to make even larger holes in the plasterboard and splice the plastic, like = complicated).

Aesthetically, this isn't visible when the valve is screwed into the wall, right? If the screws don't hold because the plasterboard hole is too large, you might be able to place a thinner piece of wood behind the plasterboard to screw into.

Edit: because there is also a pipe that you don't show in the pictures?