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Old 07-04-2011, 08:14 AM   #1
1 Rivet Member
1994 34' Excella
Greenbank , Washington
Join Date: Mar 2010
Posts: 14
Vapor Barrier under trailer

Good Morning!

Our Excella 1000 sits on a large "pad" we made from solid cement blocks.
An airstreamer we know suggested putting a vapor barrier below the trailer, and we have thought about using "Tyvek" or some brand of vapor barrier to do this.

Any thoughts on usig this material, or is there something better? I need something that "breathes."

How would we connect this barrier fabric to the underside of the trailer?

Any ides would be appreciated...

Thanks in advance!

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Old 07-04-2011, 08:36 AM   #2
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2006 25' Safari FB SE
St. Cloud , Minnesota
Join Date: Aug 2003
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The biggest contributor to excess moisture buildup down amongst the nether bits is grass growing up around a parked coach. I sure don't think I'd place any impediment to good air circulation up against the belly wrap. That area is meant to be self draining and, like a good roof, natural ventilation will take care of everything else if you have good flow away of water.

Check out that you have an intact rubrail where the sides meed the belly pan -- especially at the junction with the bumper. Avoid silicone at all costs!

jcanavera was my source on pointing out that long-term parking on concrete draws oils out of tires. Not that tires last much beyond a handful of years anyway. But you might consider rolling your tires onto small rectangles of heavy plastic.

5 meter Langford Nahanni

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