do i need insulation under the floor?

[Bigredbus]

Hi im nearly ready to put the ply floor in my camper project but when i took the floor out of my old van it had insulation under it do i need insulation on the floor under the ply?.If i do whats best to use at a reasonable price the insultion in the old van was just loft stuff but it was only running through the lower grooved bits on the floor any advice would be great thanks luke

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[Village Dave]

I think I would put something on the floor,

I ve seen vans with kingspan/celotex on the floor first, but you loose at least 1 inch,

Its a big area to loose heat from,

I ve gone for a good quallity carpet underlay, straight on the floor then ply, I'm sure its got some insulation propeties, and helps with sound proofing aswell,

another option I was looking at was multifoil roof insulation, but its very expensive for a roll, & I could not find any lying around

suppose a couple of layers of the thin stuff that goes under laminate floors might be ok dont think it has much insulation properties though

just some ideas

[zaphod79]

Ive used roll mat in the past, this time around i used laminate floor underlay (The silver stuff) I placed a damp proof layer over all of that, before i put in a wooden floor that i covered in vinyl last time, but have yet to put a covering on the new van yet.

[GBBiker]

I would first bitumen the steel floor to waterproof it (just in case).

I've seen people use 3/8" (10mm to the young 'uns) thick polystyrene sheet. You can get this stuff from places like Selco or Jewsons in 8'x4' sheets (2.4m x 1.2m kids ).

I've also seen, as above, foil cased laminate floor underlay used.


I wouldn't use Celotex as, contrary to popular belief, it will fall apart if it gets wet (trust me, I'm a Property Developer and I've had many arguements with Building Inspectors over that crap stuff!).

[jacka]

hair felt 60oz best sound proof you can get plus it takes the shape of floor i have been in flooring 25 years always used it years ago i used 2 stick it on my mk2 escort bonnet what a difference bonnet weight a ton any carpet shop will have a half roll about cheers,jacka

[zaphod79]

I would first bitumen the steel floor to waterproof it (just in case).

I did this first too