Old plasterboard with silver foil backing?!

[Manberg]

I wonder what function it has, is it some type of vapor barrier. I can attach an image if necessary! It is located against the outer walls, it has also been found in the middle of the house from -64. Grateful for an answer!

 

[baljbalj]

I don't have aluminum on the drywall but rather on a cardboard sheet (aluminum on one side) just behind the drywall. Not intended as a vapor barrier I think (nothing in the ceiling, for example). I believe it's some idea about heat radiation but I'm not sure.

Definitely puts stud finders out of play anyway!

 

[Joens]

The colleague has that at home. Zero reception on the mobile, wonderful!

 

[Manberg]

Thanks for the answers, I was also thinking about that thing with heat radiation, but then it should mainly be behind the radiators I think. We haven't experienced any problem with mobile or reception. I would need an answer from someone who definitely knows what it is for and what to replace it with.

 

[slaskman]

Had that throughout my house from -65, the foil against the insulation. No radio in that house....