The drywall screw perforates the vapor barrier

[maha20]

How bad is it with staggered joints between drywall and particleboard when you then perforate the vapor barrier with drywall screws?

 

[JOW]

There are 25mm drywall screws. If you don't drive the drywall screw in further than you should, it works.

 

[Matti_75]

There is no danger as long as you screw into the reglarna.

 

[b8q]

But the smartest thing is to have an installation layer inside the boards, so you don't have to worry.

 

[Alfred Jonsson]

Every person who puts up a painting or shelf with Mollys is perforating the vapor barrier so..

I personally consider the vapor barrier to be a completely unnecessary detail that we will probably stop using in a few years.

 

[Mugmaz]

Every person who puts up a picture or shelf with Molly's perforates the vapor barrier so...

Personally, I consider the vapor barrier to be a completely unnecessary detail that we will probably stop using in a few years.

d^_^b

 

[injonil]

Yes, it's a big problem if you perforate the diffusion plastic with the drywall screws. It has also been shown that even small things like picture nails, etc., that perforate the plastic can cause major issues. As mentioned, there should be an installation space inside the boards and then plastic.

Alfred, what are you basing your somewhat controversial opinions on?

 

[KnockOnWood]

...It has also been shown that even small things like picture nails, etc. that perforate the plastic can cause major problems...

Interesting injonil.

I assume that these problems related to picture nails are documented.

Could you please post links to the reports that have demonstrated these issues!

 

[Thomas Lundquist]

I would also like to see the investigation with tavelspikar.

 

[JOW]

Stop messing around.

If you have the option not to perforate the plastic, choose not to do it.

And if you hang up a painting with a nail, I don't think it's a big deal; you still have a slight negative pressure in the home if you ventilate correctly.
It's true that there are significantly more drywall screws than picture nails, so any comparison is flawed.

 

[Alfred Jonsson]

Yes, it is a big problem if you perforate the diffusion plastic with drywall screws. It has also been shown that even small things like picture nails, etc., that perforate the plastic can cause significant issues. As mentioned, there should be an installation space inside the boards and then plastic.

Alfred, what are you basing your somewhat controversial opinions on?

What do you mean by controversial opinions?

That plastic often can do more harm than good is known to anyone who has worked on houses built with diffusion plastic.

 

[b8q]

What do you mean by controversial opinions?

Everyone who has tinkered with houses built with diffusion plastic knows that plastic can often do more harm than good.

If you had written "That plastic WHICH HAS BEEN PUNCTURED can often do more harm than good", I would have agreed with you every day of the week.

 

[injonil]

Interesting injonil.

I assume these issues related to fasteners are documented.

Could you please provide links to the reports that have demonstrated these issues!

Not quite, but I’d be happy to share where I got this information from.

My father meets a lot of knowledgeable people in various fields and once had a conversation with someone from Skanska's research department. The researcher mentioned that they previously received many complaints due to perforated vapor barriers, particularly because of the sensitive construction where the vapor barrier is so close to the surface layer that nails/mollys, etc., make holes.

I don't have more details; it might, for example, be worse with such a construction in rented apartments that change owners often, but that a punctured vapor barrier can cause moisture and mold problems isn't particularly surprising, is it? Why else would they have completely abandoned that construction today?

 

[Snailman]

I read a few years ago that the total holes in the plastic wrap should not be larger than the equivalent of half a palm, and as I said, that was a few years ago, it should probably be even less today and definitely in passive houses (they should even be pressure tested).

 

[Alfred Jonsson]

And all the hundreds of thousands of houses that don't have any plastic foil at all, how come they haven't rotted away?

As a carpenter, I consider that I've seen so much more moisture damage in new houses that have plastic foil than in old houses that don't have it.