mikeschn wrote:Len uses a rubber backed carpet on many of his builds. He'll probably be along to tell you more.
Mike...
Yes, Yes I do use a "Foam Backed Rug" on the walls on my "Bear Bones Trailers'
In fact I'm probably the biggest proponent of Foam Backed Rug on Teardrop side walls ever.
The first thing I do is use a Latex floor adhesive and I make the panels up well in advance so when I finally install them they have already dried in an open area instead of a closed (inside the tear) area.
I also make the floor and ceiling panels covered with rug (though my floors & ceilings/roof are insulated) well in advance.
By making these up in advance I find I get no "new tear smells" once its together.
As far as the side walls I find I can hide all my wiring in a notch I make with a router beneath the rug.
A rug will also hide a brad nail/staple.
As far as an insulation value goes no one has ever put "R" values on foam backed rug BUT, I'll bet (just a guess) a 3/4" plywood wall covered with a Foam backed rug vs. a 3/4" Styrofoam framed wall is pretty close. Even weight wise I'll bet its close.
Even if it isn't close, Its More than adequate.
Plus if you consider the ease and time saved in construction, the "R" values, weight and above all the "New Builders Skill Level"
I think a 3/4" Plywood side wall with a foam backed rug is the way to go for a new builder.
"R" values; A house should have R30 in the Roof and at least R11 in the side walls and that is considered ample insulation (conforms to Fed act 222)
I'm not an engineer and nor do I want to spend any time trying to figure this out, but the side walls on a house are about 66% less then the roof. And energy company's give that ratio a VERY GOOD rating.
My ceilings are at least R7, I would think that a 3/4"plywood wall covered by a foam backed rug is at least R3. ( a good sweat shirt is probably that)
Same ratio as your home.
However lets keep in mind that All R values on any RV, from a Tear to a Prevost Bus are grossly under housing industries standards.
That being said, The bottom line, anything is better than nothing.
Plus 48" is narrow enough without narrowing the inside anymore for a few more "R" points/pounds.
And it gives the cab a nice "quiet" sound, kind of cozy too.
Just my opinion and experience.
Happy Trails
Len