Interior Heat Insulation

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Jul 24, 2012 | 08:32 AM

extechguy

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Joined: Sep 2011

Posts: 73

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From: New York

Interior Heat Insulation

I plan on putting in A/C on my 68 convertible and want to insulate the floorboards to help the efficiency of the unit. I see a number of different products on the market, I want something to go under the carpet that will not be too thick but still block the heat. I have the underbody transmission hump insulation in place already.
Thanks

Jul 24, 2012 | 09:28 AM

SIXFOOTER

Le Mans Master

Joined: Jan 2006

Posts: 9,192

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From: Boca Raton Florida

So a google seach for Home Made Lizard skin.
Its a paint with tiny glass ***** in it. Seems to work pretty well

Jul 24, 2012 | 10:29 AM

jcloving

Burning Brakes

Joined: Dec 2010

Posts: 945

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From: Winston Salem NC

I put hushmat (for sound deadening) and Reflectix (for heat) on my floorpans, tranny tunnel and firewall. It worked like a charm.

I used alumnum duct tape to hold down the refectix. It has held perfectly.

Last edited by jcloving; Jul 24, 2012 at 12:14 PM.

Jul 24, 2012 | 11:15 AM

REELAV8R

Le Mans Master

Joined: Apr 2011

Posts: 6,284

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From: Hermosa

I used the reflectix stuff too. Got it at a home improvement store and used 3M spray adhesive to hold it in place. I used it from the front firewall to the back wall behind the seats. Put it under the carpet.it is very effective for heat.

Jul 24, 2012 | 07:35 PM

great68

Instructor

Joined: Oct 2011

Posts: 138

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From: Point Texas

I too have a 68 427 with factory cast iron headers that generate lots of heat. I put reflectix reflective insulation (not the bubble type the foil type you stick on from lowes) on the outside firewall and the reflectix mat or bubble on the inside under the carpet and that stopped about 80% of the heat. My neighbor, who has his first vette from 1960 told me if I get some ceramic header and rap them the rest of my heat problem will be gone and my a/c will run on low!!!! The radiant barrier on the outside of the firewall seem to help the most cause it stopped the heat from getting in the cabin. Hope this helps.

Jul 24, 2012 | 11:24 PM

extechguy

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From: New York

What is reflectix normally used for if it is sold at home improvement stores??

Jul 25, 2012 | 05:36 AM

marshal135

Safety Car

Joined: Sep 2011

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From: Madeira Beach, FL

2024 C8 of the Year Finalist - Unmodified

2024 C2 of the Year Finalist - Unmodified

2023 C2 of the Year Finalist - Unmodified

2020 C3 of the Year Finalist - Unmodified

Used for HVAC.
Heating,ventalation,air conditioning plenums and ducts to insulate
and lower energy bills by reducing heat and A/C loss as it passes through the ducts.
It either keeps heat and A/C in or out depending where it is applied.
I'm planning on using it on the underside of my floorboards and then reinstalling my stone shields so it will be undetectable.
In our application for the cars we are trying to reflect or divert the heat away as cold air is drawn to warmer air.
Marshal

Jul 25, 2012 | 09:18 AM

jcloving

Burning Brakes

Joined: Dec 2010

Posts: 945

Likes: 10

From: Winston Salem NC

Yes, refletix is used for home insulating. I was leery about using it outside the cabin though. It is probably flammable....like everything else on this car.

Now on a long drive, the only thing that gets hot is the shifter shaft. It is a nice steel thermal conductor between the tranny tunnel and the cabin. It probably gets up to 90-95deg. or so. I will have to check. I haven't figured out yet how to insulate that.