gleninsandiego

Doing the interior firewall and tunnel insulation now on my 69

Is the exterior insulation needed if I do the interior right?

I have already sprayed lizard skin on the interior
and going to put more insulation on top of that

If I do need exterior, what is the call for that? DEI floor and tunnel shield?

Thanks
Glenn in San Diego

Richard454

Depends on what you want-

Sitting in traffic and long drives- definitely. NCRS event- Nope!!!

You've spent a couple hundred bucks on the lizard skin- why not spend a little more and make a big difference-

Look at every new car the past 20+ years and they use all sorts of heat-shielding outside the passenger cabin...The space shuttle uses heat shielding on the exterior too!!!

I used the "zero clearance" adhesive backed heat shielding- and did the Lizard Skin on the interior too-

https://www.thermalcontrolproducts.c...zeroclearance/







I used some goof-off to remove the logo/lettering-

OldCarBum

Would it pay to just spray lizard skin on the interior and the exterior or is it best to use a zero clearance type product on the exterior?

ddawson

I would max everything out. Using aluminum to absorb to dissipate heat on the outside. Lizardskin is an insulator which works great but I would still top it with a another barrier.

I didn't use Lizardskin but at some point I'll add it. Just doing the outside made a huge difference.

Goody

Are you insulating for sound reduction or heat reduction?

gleninsandiego

Thanks for all the replies so far

I am mainly insulating for heat

Right now everything is gutted with the engine out so I have free access to do anything
I am mainly concerned with the firewall and forward floors at this minute

Putting in a Vintage Air evaporator this week so I need to make some decisions soon

How far up the firewall did you bring the exterior insulation

Glenn

ddawson

With the engine out the whole tunnel and a little of the firewall then left and right as high as I could go until you start running into other things in the way of the sheet.

gleninsandiego

What brand did you use on the exterior?

ddawson

DEI floor and tunnel, please wear gloves.