Wall Insulation

[HiJoeSilver]

Originally Posted by ericpeltier

Has anyone used prodex between the subfloor and bellypan?

I didn't, reflectex and the prodex are for radiant heat transfer, didn't think there would be much of that on the bottom of the trailer.

Of note, on my AS tour a few months ago I noticed that the insulation they are doing in the belly is putting a single layer of reflectex on top of the frame before they drop the floor and gramp on it. Like they did with the fiberglass originally but now only the reflectex down there.

[TheGreatleys]

Originally Posted by HiJoeSilver

Of note, on my AS tour a few months ago I noticed that the insulation they are doing in the belly is putting a single layer of reflectex on top of the frame before they drop the floor and gramp on it. Like they did with the fiberglass originally but now only the reflectex down there.

So, you're saying Airstream has been reading my blog, then?

[Wabbiteer]

Reflectix is built around air pockets, they have no/low resistance against crush force the way 5mm of dense foam like Prodex displays, a continual sheet would be a vapor barrier and provide about R-0.7 minimum insulation before the tricks of radiative/reflectance properties, and remove the need for any/many additional fasteners to hold it in place.

Note: there were no belly wraps in place during the following experiment...

When I tore out the one-sheet-thickness-of-air-gap Prodex the moisture content underneath was saturated, smelled of mold too, I'd prepped the floor underside with kilz sealer paint and gasket sealed the Prodex tightly with vulkem... and it ended up trapping moisture anyhow.... anyhow, I made the sheet 'drain' towards the center by a double thickness standoff and used a nail to chew weep holes there to encourage liquid water to drain if it ever was present... maybe if the wraps were on I'd have seen something different when tearing it out.

EDIT: added photo

[HiJoeSilver]

Originally Posted by TheGreatleys

So, you're saying Airstream has been reading my blog, then?

Maybe
They pointed out several times that it was developed for the space program!

[TheGreatleys]

Originally Posted by HiJoeSilver

Maybe
They pointed out several times that it was developed for the space program!

Good to know that's an option now, if I ever choose to travel to space with my Airstream.

[ericpeltier]

Originally Posted by HiJoeSilver

I didn't, reflectex and the prodex are for radiant heat transfer, didn't think there would be much of that on the bottom of the trailer.

Of note, on my AS tour a few months ago I noticed that the insulation they are doing in the belly is putting a single layer of reflectex on top of the frame before they drop the floor and gramp on it. Like they did with the fiberglass originally but now only the reflectex down there.

..and they are pinching the reflectex between the fram members and subfloor?

(I assume they are, for production ease)
thx

[HiJoeSilver]

Originally Posted by ericpeltier

..and they are pinching the reflectex between the fram members and subfloor?

(I assume they are, for production ease)
thx

Yep just like the way the old fiberglass was put down.

[ericpeltier]

Originally Posted by HiJoeSilver

Yep just like the way the old fiberglass was put down.

I wonder if I need to worry about condensation buildup, when the subfloor is warm and the outside is cold? I do live in a very dry climate, CO.

Thoughts?