ᐅ Insulation below vapor barrier moldy?

Hello everyone,

I accidentally drilled into the vapor barrier in the wall. At first, I thought the insulation looked a bit gray. However, when smelling it, there is no odor. It is also not damp. Shouldn't the insulation smell moldy or be damp if it were moldy?

Unfortunately, I can’t take a photo because I don’t want to damage the vapor barrier any further.

Best regards

Paulemann1

One more question. The hole is 3-4cm (1-1.5 inches) in size. Can it still be patched, or should the membrane be completely replaced?

Simply use a tape specifically designed for this purpose to patch it. This type of tape is also used to seal the joints of the vapor barrier.

Thank you for the help!

This only refers to the hole. Regarding the alleged mold, surely others can provide you with an answer.

This could be mold or simply dust. If it is dust, it means it was either introduced during installation or there is air leakage in the insulation. Air leakage would be a good sign, as it likely means it is not mold; however, insulation that allows air leakage does not insulate very well. Without a photo, it is difficult to say more.