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Old 08-14-2018, 09:18 AM   #1
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Question Dynamat then Reflectix then Thinsulate - ?

Hi all

Sound and thermal control - the best approach.

Looking to maybe buy a van (likely 2019 or 2020 Transit) and hire a company to do a minimal build in. I dont have the time or the skills to do it.

I’m researching the best way to dampen sound as much as possible, and also thermally keep heat out, and also keep cold out.

How about - From gas pedals to back, Visors to back. B pillars to back.

First (outer) later = Dynamat

plus Reflectix - same areas.

plus 3M Thinsulate - same areas.

Is the Reflectix a good idea?

If I use all three… should the Reflectix be next to the Dynamat ….or should the 3M Thinsulate be next to the Dynamat, with the Reflectix on the inside?

I have read that the Dynamat is a really good option for noise dampening…. does not dry out… works well… but am open to suggestion.

also - is this combo good for both walls + ceiling but also the FLOOR ?

thanks.
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Old 08-14-2018, 10:04 AM   #2
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Reflectix aluminized surface reflects infrared radiation, IR, heat. Due to its inner air bubbles it will provide some insulation but not much, any fiber or foam based insulations would be superior.

Reflectix placed directly against windows will reflect IR from outside, it is good.

Reflectix against any not IR transparent material is useless except its limited air bubbles providing some heat transfer flow restriction, not good.
Reflectix exposed to inside will reflect human generated IR and will help to retain heat during cold days.

A generic rule for Reflectix – it needs an air gap for it to work, minimum ½” or better.

Most common mistakes are using Reflectix sandwiched between IR non-transparent materials like some plastics, metal, carpet, fabric etc.

I built my van using Thinsulate only. The van is very quiet and reasonably comfortable in low and high temperature, no AC but good fan and Espar D2.
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Old 08-14-2018, 12:16 PM   #3
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There are some spirited discussions along these lines over on Sprinter Forum. I know you said Transit, but when it comes to things like insulation, a van is a van.
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Old 08-14-2018, 01:27 PM   #4
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.

You need an air layer for the Reflectix to work.
if the aluminum foil is pressed against the van side panel, it becomes useless.

You can skip the Reflectix and the Dynamat.
Thinsulate has sound deadening property.
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Old 08-14-2018, 06:30 PM   #5
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Make sure you have all of your windows (including windshield) tinted with 3M Crystalline (FitRV video review).

We had this done on our rv and it's made an enormous difference in the heat entering via windows. Down south, this tint is the difference between running the AC full blast and still being hot vs running the AC on low and being pleasantly comfortable.
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Old 08-15-2018, 01:22 PM   #6
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Default Lizard Skin ?

Anyone have real world experience with Lizard Skin Ceramic Thermal Insulation Coating ? https://www.lizardskin.com/car-ceramic-insulation.html
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Old 08-15-2018, 02:08 PM   #7
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Quote:
Originally Posted by dhuff View Post
Anyone have real world experience with Lizard Skin Ceramic Thermal Insulation Coating ? https://www.lizardskin.com/car-ceramic-insulation.html
I know someone who upfitted their Ford Transit with Lizardskin insulation, and swears by it, for both sound insulation and thermal insulation. It isn't cheap, but he said it was one of the best investments he has done with his conversion.
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Old 08-15-2018, 06:59 PM   #8
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I don’t have experience with it but a while back was trying to find an actual spec for insulation, found none. The coating is about 1mm thick, I wish to see some insulation numbers for such thin layer.
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Old 08-16-2018, 12:21 AM   #9
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I gather that it's more of a reflective sort of thing vs. insulation per se.
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Old 08-16-2018, 01:55 AM   #10
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Quote:
Originally Posted by dhuff View Post
I gather that it's more of a reflective sort of thing vs. insulation per se.
As they tell you in "Intordouction to Thermodynamics": There are three ways that heat is transferred: Conduction in solids; Convection in fluids; and radiation in space. You need different methods to stop each.
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