Thanks for the input! Another layer of plastic on the inside of the sheel metal is a solid idea. I ended up deciding against the dynamat as a barrier, I don't think it would do a good job unless you made some closeout panels to fill the voids - and then you would still have the nightmare of servicing it if you ever had to.smwalker wrote: ↑Mon Jun 07, 2021 9:35 pm
Would not recommend Dynamat for a vapor barrier serviceability would be compromised big time. I would recommend a secondary interior shell barrier to channel the water to the interior of the door. The way our vapor barriers attach with butyl it's asking for trouble. Went into it a bit here. https://www.newcaprice.com/forum/viewto ... 219#p23210
So I ended up with 3 layers for water and sound control:
1. Interior liner to direct water to bottom of door. Clear plastic 8 MIL
2. Outer vapor barrier - Factory plastic piece - new butyl rubber along the bottom
3. Layer or Sound Dampening Mass Loaded Vinyl hanging from velcro strips at the top of the door panel so can be removed for service
4. Door Panel
I ended up using some new butyl in a few places, and then rolling it with the metal roller I was using for the dynamat installation. So it is very strongly adhered to the door. Then I went and did waterproofing tape over the lower half of where the vapor barrier adheres to the door, as a backup seal if it gets past the butyl. I don't think I'll be having any problems (fingers crossed).
Got a few other small things done on the car, but been busy in the shop/house with other priorities the past few days. Hopefully get back into it shortly.