They wrap buildings in this stuff for the vapor barrier.

I recently pulled a door panel, and the plastic, I think, was stock.

I was thinking of using tykek to replace it.

Thoughts?

Should work just as good as a glad bag. But stronger. Tyvek will keep out moisture and wind...

The stock plastic was both a moisture barrier and a way to keep the wind noise and drafts down ...

And then you can use sheetrock instead of door panels, put some mud on there with a nice texture, paint it eggshell white.... j/k

Might even cut noise levels a little more? If you have some extra on hand give it a try. We wanna see.

IIRC Tyvek is a more "breathable" membrane made for wood framing, so IMHO you'd be better off using standard poly-sheet "Visquene" as used under the concrete slab floors. Visquene is also available in roll stock & various thicknesses. 10-12 mils would suffice I would think.

We spell it "Visqueen" down here and I agree it would be better.

I agree. Tyvec is not a vapor barrier, it may be moisture resistant but it's not moisture proof.
You're looking at the wrong side of the studwall...6ml poly vapor barrier will do a better job and is what I've used for years in VW bug doors.

What's all this moisture proofing talk? Better block off those drain slots and silicone up all the window squegees, felt strips, door handles and block off that key hole, too!

I know you're joking, but the main purpose of the VB is so your door panels won't rot off. The backs are basically paper (masonite) and will turn into warped crap in no time flat without a VB.

tyvek is a wind barrier.
It is designed to let moisture escape from the building.

By design it will allow moisture to go through and wreck your door panels from behind.

To do it right, use plastic.

Rich

.......It sure will!

i've got stego you can use.

Question for the Tyvek experts... I thought it was a moister/vapor barrier?


Quoted from their site. http://www2.dupont.com/Tyvek_Weatherizatio...homeowners.html

So you're saying "air-transported moisture" doesn't really mean vapor proof, just water resistant?

Yes, the best analogy I can come up with is think of a water resistant watch compared to a water proof watch.

Quote from your link:

Tyvek will allow vapor (gas) moisture to travel through it in either direction but stops liquid water. This is beneficial to allow a homes wall system to breathe in both directions as the climate changes from winter to summer without a buildup of condensation which could dry rot the framing.
Plastic will stop both vapor and liquid moisture, but could lead to condensation which could create rust on the inner door.
Since the inner door panels aren't sealed, I wonder how much protection the plastic is really providing. But, if vapor damage to the inside of the door panel is a bigger problem than rust damage from condensation, I'd stick with the plastic. Seems like a toss up to me.

Interesting. I thought it was designed to prevent all moisture from getting in (including vapor, as I thought they meant by "air-transported moisture") but to allow vapor to escape... One-way. Which would mean it would matter which side you faced outward.

If it actually allows vapor to pass both ways, obviously it's not good for the door panel application.

Good discussion.

This is not to code.

The amount of vapor that is allowed to travel through any weather barrier is calculated as a perm rating. Tyvek has one of the highest perm ratings at 28, building paper about 6, plastic 0. If Tyvek only allowed vapor to travel in one direction you'd risk condensation and mold problems during part of the year. I'm still not saying it's the best answer for a 914 door, I think that would take some testing to determine. But, if you want to stop vapor, use plastic.

I think the real question is, would contractors pay all the 914world members for their used door plastic so they could wrap a building and save money?


Sounds like it's equally silly to use anything other than plastic in our doors. Kinda like sheetrock mud vs bondo.