ᐅ Vapor barrier membrane damaged

Our electrician damaged the vapor barrier while installing some halogen spotlights. He simply cut out large sections corresponding to the size of the lights, so the insulation was visible from the side. After we complained, he temporarily sealed the areas with tape, but there is still air leakage. What consequences can we expect if this is left as it is? How can this issue be properly and professionally fixed?

So, it is essential to insist on proper remediation here, as just a bit of makeshift sealing is useless. It must be sealed airtight against vapor.

If it is not sealed correctly, your insulation wool can absorb moisture and eventually the entire material will need to be replaced, for example, due to mold growth.

I would also recommend having a repair done here, as once the insulation wool gets wet, it is very difficult to restore it properly.

This needs to be arranged by the electrician, as they caused the damage. It is especially important to ensure that the insulation is sealed properly. Simply taping it shut is ineffective because water can enter and damage the insulation wool.

I agree with that, and in this case, the electrician is responsible. Sealing it with tape is not a solution. Water can penetrate there, causing significant damage.

As the term implies, a vapor barrier must be airtight. Its purpose is to prevent moisture from entering the room. If it is damaged or only roughly patched, moisture can get into the room and mold may develop. If the electrician is not aware of this, they should consult their colleagues for advice.