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Tyvek

PostPosted: Wed Apr 12, 2006 4:40 pm
by rainjer
Has anyone tried using Tyvek as a moisture barrier under their skin/roof?

It seem it would be good insurance to help prevent leaks. It is breathable & water resistant.
More info:
http://www.tyvek.com/whatistyvek.htm

I was thinking of using it between the roof spars & the skin. It is light weight & I can get it for free.

Any thoughts.

PostPosted: Wed Apr 12, 2006 4:43 pm
by Chris C
Do a "search" on it and I think you'll find it's been discussed before.

Re: Tyvek

PostPosted: Thu Apr 13, 2006 6:25 pm
by Slayer
rainjer wrote:Has anyone tried using Tyvek as a moisture barrier under their skin/roof?

It seem it would be good insurance to help prevent leaks. It is breathable & water resistant.
More info:
http://www.tyvek.com/whatistyvek.htm

I was thinking of using it between the roof spars & the skin. It is light weight & I can get it for free.

Any thoughts.

All I know about it is it makes a great kite.

Re: Tyvek

PostPosted: Thu Apr 13, 2006 8:43 pm
by alaska teardrop
rainjer wrote:Has anyone tried using Tyvek as a moisture barrier under their skin/roof?

It seem it would be good insurance to help prevent leaks. It is breathable & water resistant.
I was thinking of using it between the roof spars & the skin.
Any thoughts.
    Rainjer,
    If your skin (wood, aluminum, ect.) and fasteners are sealed, I see no advantage in creating a barrier directly under the exterior. An interior vapor barrier or insulation choice would be more important in cold weather to protect the inner framing and insulation from moisture damage from within.
    Fred - The world's farthest North teardrop builder. :snow

PostPosted: Thu Apr 13, 2006 9:35 pm
by Chris C
rainjer,

One thought came to mind while I was out running errands this afternoon. If you put a vapor barrier (like Tyvac) down under your teardrop skin, what surface will you have to glue your skin to????? :thinking:

PostPosted: Thu Apr 13, 2006 9:37 pm
by rainjer
Chris C wrote:rainjer,

One thought came to mind while I was out running errands this afternoon. If you put a vapor barrier (like Tyvac) down under your teardrop skin, what surface will you have to glue your skin to????? :thinking:


I had not thought of that..... :thinking:

PostPosted: Thu Apr 13, 2006 11:43 pm
by asianflava
Check the search under "Vapor Barrier"

PostPosted: Fri Apr 14, 2006 9:09 pm
by Melvin
FYI: Tyvec is not a vapour barrier, it's a water and air barrier. Water vapour goes through it like a hot knife through butter.

PostPosted: Sat Apr 15, 2006 7:38 am
by cracker39
Chris C wrote:rainjer,

One thought came to mind while I was out running errands this afternoon. If you put a vapor barrier (like Tyvac) down under your teardrop skin, what surface will you have to glue your skin to????? :thinking:


That's why I didn't put any vapor barrier other than my foil-backed foam insulation. I wanted good wood to wood contact between the skins and frame. I put Tyvek on my previous house in Maryland when I replaced the old composite siding with vinyl siding.

PostPosted: Sat Apr 15, 2006 7:54 am
by Chris C
Melvin wrote:FYI: Tyvec is not a vapour barrier, it's a water and air barrier. Water vapour goes through it like a hot knife through butter.


You are quite correct...........my error. But the net result of him using Tyvek would be that he'd lose the neccesary requirement of good wood to wood contact for the gluing process.