Teardrops n Tiny Travel Trailers

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.

Do a "search" on it and I think you'll find it's been discussed before.

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.

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.

See publication EEM-00259: www.uaf.edu/coop-ext/faculty/seifert/publications.html

Fred - The world's farthest North teardrop builder.

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?????

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?????

I had not thought of that.....

Check the search under "Vapor Barrier"

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.

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?????

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.

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.