You could try aircell permishield? Or maybe speak to an upholsterer to see if there's an insulated lining you could use.

Looking for a professional looking job?
If NOT, buy some 8mm closed cell foam sleeping mats from an outdoor / camping store (around $10-$12), and a tube or two of liquid nails (or kwik grip) and cut and paste. Get different coloured foam mats and get creative.

solar roof fan, 70$ on ebay, got one on my iload, works a treat (even in the shade for hours)

See if you can work in a mini disco ball and then send us some photos.

Clark rubber sell a load of different foams.Roof vent would be good to stop condensation especially if you've got wet gear in the van.

Have all the girls you have sex with in the van donate their underwear for the cause!..... no damp barrier required!
Should offset the smell of wet sailing gear.
You will also save money on adhesive...
Ooooh was that a bit rude......just an idea I had.

For self-adhesive insulation, suggest you try:

www.megasorber.com/

www.jenkinsrubber.com.au/?stg=657&view=657

stehsegler said..

I have used pink batts for that job in the past then covered them with light weight laminated wood sheets. I bought the wood sheets from a specialist Caravan shop.

The important thing with pink batts is that you need to install a damp barrier over the top. The damp barrier is basically a sheet of plastic taped down with tape. There are a number of different products on the market for that job. Go to Bunnings and see what they have.

If you don't install the damp barrier the fibres will collaps when they get damp / wet. Also make sure you wear a protective mask. The fibres are quite small and shouldn't be inhaled.

Just be mindful that the insulation value for these type of batts is dependent on maintaining its thickness. Once you compress pink batts (or yellow or any glass fibre material) say from the specified 70mm to say 20mm it's virtually useless as an insulator. Also as these batts rely on the air space between fibre particles to do the insulation, that air on a humid day with wet gear in the van usually has a very high moisture content and as the sun goes down the surface temp of your metal roof cools much quicker than the ambient air temp thereby creating condensation on the underside of the roof which over time will rust it out prematurely (hence stehsegler's comment regarding the sisalation / damp proof barrier). if that damp course layer isn't tightly fitted to the metal and air gaps exist you can still get condensation on the underside of the roof.

I reckon Sailhack's suggestion to use an Aircell foil product would be economical and effective.

Try Pink Batts R 3.5.

If you want insulation from road noise. Try a solid bulkhead to screen off the drivers cabin.

There should be a safety benefit. Your AC and sound system will work a treat.

If your van lives in the sun, you probably have no choice, but cargo bay insulation seems to create as many problems as it solves.

Revhead said..

try dynamat

Everybody seemed to ignore Revhead? Check it out, looks like the just the thing. The sticky back solution designed for the job. Why reinvent the wheel the hard way?
www.ryda.com.au/dynamat-11103-dynaliner-1-2