I just reached out to Dodomat and they have advi
View attachment 122379sed the SQ sound deadening should be fixed on the door and not the door card the only reason I mentioned this was because I saw this on the box -or have I got something different ?
I guess they say that generally for most applications anywhere else in a vehicle, you would put it on metal.
On the T6.1, there is very little interior metal work on the doors, the outer skin is obviously metal but you can't really get to that unless you remove the inner plastic panel with all the electric window stuff attached to it (there's some pics earlier in this thread). Personally, I wouldn't try that and I'm not sure putting stuff inside the door would have much effect anyway and possibly obstruct the window mechanism.
I've seen pics of T5 and T6's (which do have an metal inner door panel) with deadening on and I thought about putting some on the plastic panel, but again I'd worry because of all the stuff attached to it, wires etc. Once I got the door cards off and saw the only stuff VW had fitted themselves was to the cards, that seemed the logical option, and looking at other pics in this thread, that seems to be what others have done.
Dodo actually sell a very similar product as part of a kit where they say apply the roll to the doors and extra foam panels to the doors behind the speakers. I'm no expert, but in terms of sound deadening, you attach it to anything that potentially vibrates. All the stuff I've seen and read online shows insulation attached door cards as well as the doors themselves too.
It's worked for me anyway, and was by far the easiest and less messy option. As I've got some left over, I might put a bit on the metal door just behind where the speakers are (which you can get to when you take them out), but I'd be careful as it might interfere with the window going up and down.