Insulating from below


#1

Has anyone insulated the floor from below? I don’t have a high top and I want all my headroom, polyiso from below seems to be the best solution. I know it’s potentially vulnerable to road debris and squirrels but I don’t see it being done much, there is only one video I found on youtube with it being used. Is there a nightmare story I am just not hearing?

Craig


#2

Hmmm… in all of the van life videos I’ve ever watched, I’ve not once seen, or heard, of anyone doing that. Do you have a link to that video? I’d love to see it!

Insulating confuses me a bit because I’ve heard people staunchly advocate it and others who say it’s overrated. I’m more inclined to insulate against the heat than I am against the cold.

Mice can be a big problem in van life. If nothing else, that would be my biggest concern since I plan to be very rural most of the time.

I get nervous when folks put their water tanks and/or propane under the van. That lowers their clearance and how do they not get damaged and punctured?


#3

Adding a layer of dynomat or truckbed liner under your floor is a good option if room is a concern of yours. I cut and added some to the inside of my wheel-wells to cut down on vibration and temperature.

I painted the entire floor inside with truckbed liner and added a can of Great Stuff under the sub-floor before I put it down. Filled in all of the empty spaces, waterproofed, and insulated it like crazy.

I have also mounted my water tanks up under the floor but I live in Los Angeles, where weather isn’t a thing. Having the extra room inside is worth the risk to them getting busted, which hasn’t happened, yet. Anything can be replaced or done better


#4

Is this the video that you found on YouTube? I’ve been trying to find more information for you but, I agree, this video isn’t much help.

After some searching, the only other info I found was this conversation and this one that at least talk about whether or not it’s a good idea.


#5

Yep that was the video that got me going on it.


#6

Well, you may just have to be the pioneer that does it and educates other van lifers on either the benefits received - or lack of necessity for - insulating the undercarriage.

Not being an expert by any means, my first thought is, “Yeah, I can see how that would help.” But the bigger part of me thinks it would be:

  1. A rodent/pest invitation.
  2. A possible fire hazard (depending on the type of insulation I guess).
  3. An unnecessary expense given that auto makers don’t do it already. Are there things under there that need the space to breathe to keep cool?

At any rate, I hope you’ll keep us informed on what you choose to do and the results!


#7

Greetings!

I think I’d stick to the original type thick felt pad that they use under the carpet in passenger vans.

Cheers!


"With age and experience comes wisdom and knowledge." ~ RoadWise