punctured vapor barrier with a screw that's too long

[gnuttisch]

Hello

I accidentally punctured the vapor barrier when I was fastening OSB against slats, in a hurry I used 42mm screws without thinking and may have slightly screwed through the vapor barrier. 12 + 28 equals 40, so how much damage could it cause?

Regards

 

[KiingCoong]

Are we talking about the outer wall, roof, or floor slab? It depends a lot on where it is about. It's not necessarily as dangerous as it might seem, but puncturing a vapor barrier is something you want to avoid.

 

[Avle]

Has anyone seen damage caused by a punctured vapor barrier?

I've personally never seen it. Of course, it's good to minimize the damage to the vapor barrier during new construction, but it usually doesn't end up being as tight as one might think...

 

[useless]

If the screw is still in place, it shouldn't matter much. Virtually all houses from the 70s when vapor barriers were introduced up until a few years ago when the 'connection space' became popular have the vapor barrier directly behind the wall cladding with a thousand screws through it.

 

[gnuttisch]

some in the ceiling towards the attic but mostly in the outer wall. on the other side of the plastic, there is loose fill insulation pressing against the stud.

 

[KnockOnWood]

Moreover, if it is a "modern" built house with FTX ventilation, the ventilation is adjusted to create a slight negative pressure in the residence. This is precisely to minimize the risk of warm, humid air "seeping out" into the insulation and causing problems.

 

[gnuttisch]

we have done a roof lift on a villa from -45, the new floor is built with today's regulations while the ground floor has no plastic.

We have installed an ftx unit yes, but it is not yet adjusted.

Hope that there won't be any problems, just feels so stupid when you've bought tape for thousands to make the plastic tight.

 

[KiingCoong]

As most people say, there should be no issues just because there are a few screws through it. The tape is mainly intended to repair larger holes and seams. There are probably few houses that have a plastic that isn't punctured anywhere at all!