Question Foam board insulate underbelly

[CMRobbins]

My 5er has a sealed underbelly, and I've considered attaching R-10 styrofoam board for the winter to help prevent water line freezing, which occurred last winter. Has anyone done this?

 

[Fish]

No I haven't and I wouldn't even consider it if you're talking about putting it on the underbelly. R10 is 2 inches thick. Well over $30 a sheet if you can even find it. Attachment would be very problematic as would removing it to move the unit.
Wedging it around the perimeter might work. I've seen people do this when I was living out of my fifth wheel for work in the winter.

 

[CMRobbins]

Thanks for your quick and thoughtful answer. You are correct about the cost.

 

[Gronk]

I agree with Fish. Using it as skirting would do just about the same thing and be way cheaper.

 

[CMRobbins]

Thanks guys, I'm going with your advice, and will move on to consider other options.

 

[Kevin D Pem]

Anything that reduces airflow under the rig helps fight the cold.
My plan this year is to put hooks along the edge and suspend/strap old hospitality sheets to the ground around the rig. This may well keep the mice at bay, will have to see.