Van is here! Floor insulation question - Ford Transit USA Forum
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post #1 of 16 (permalink) Old 05-04-2019, 01:06:PM Thread Starter
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Van is here! Floor insulation question

Based on input from many of you (Thanks to all of you, especially Ed), I placed my order on January 25th and took delivery on 4/26. Here is what I ordered:

- 2019 Ford Transit 250 High Roof Extended with dual sliding doors (R3U)
- 3.5L Ecoboost (99G)
- Ingot Silver Exterior Color (UX)
- 3.31 Limited Slip Diff (X3L)
- Heavy Duty Alternator (63C)
- Dual H.D. Batteries (63E)
- Passive Anti-Theft System – PATS (66P)
- Perimeter Alarm (59D)
- 12V power in rear (87A)
- Reverse Sensing System (43R)
- Power-Folding Heated with Turn Signals, Short-Arm (542)
- Trailer Brake Controller (67D)
- 16" Aluminum Wheels (64S)
- Fixed rear door & Driver / Passenger sliding door glass (17D)
- Privacy glass (includes rear defogger, 57N) (92E)
- D-Pillar assist handles (66C)
- 2 Additional keys (86F)
- Power inverter (90C)
- Cruise Control (60C)
- Auxiliary Fuse Panel with High Spec Interface Connector (it includes modified vehicle wiring system 53K) (87E)
- Front / Rear Aux A/C & Heat (57G)
- Audio #22 – AM/FM, 4”, SYNC, USB port (58Y)
- Charcoal Black Leather (21S)
- Heavy Duty Tow Package (53B)
- Remote Keyless Entry (52C)

I'm a cyclist so my goal is to put 5 bikes in the back (using fork mounts on L-Tracks) a bed above the bikes and two sienna seats (also using L-Tracks) by the sliders.

I have started construction on the floor - see pics. I have a layer of 2mm thick soundproof material (quiet barrier MD from soundproofcow.com) to put down and then I'd like to put down some thermal insulation. Is there something thinner with a better R-Value (~3.5) than 0.5" thick polyiso sheathing?

Thanks!
Jeff
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post #2 of 16 (permalink) Old 05-04-2019, 11:27:PM
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Welcome to the dual slider club! I've got the F4U body style.

2018 T350HD Dual Slider Dual Window 3.5EB 3.73 LSD

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post #3 of 16 (permalink) Old 05-05-2019, 12:13:AM
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Hello and welcome to the DIYvan fun.

You can use 3M Thinsulate(TM) AU4002-5 under the floor. It is an acoustic and thermal insulator engineered for vehicles so you wouldn't have needed to use the quiet barrier product. Also highly suggest you use Thinsulate(TM) SM600L for the walls and ceiling. You won't need any other noise control at all. You will be amazed how quiet your van will be if you use Thinsulate(TM) throughout.

Here is a link showing how to use Thinsulate in the walls and ceiling: https://www.impact3d.com/Thinsulate_installation.html

And a photo below of the AU4002-5 for the floor before the plywood goes down. There are some details that I need to share with you.


Please call on Monday and we can go over the details. If you want to install a vent then you will need one of our patent pending adapters. We are here to help with a lot of things regarding to your van build so please give us a chance to do that for you before you proceed much further.

All the best,
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post #4 of 16 (permalink) Old 05-05-2019, 11:48:AM
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Hein you seem to have become super aggressive in pushing your product.

Has anyone here gone full-Hein and used nothing but straight thinsulate as their do all be all material, worthy of blood sacrifice and rituals of worship?
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2017 Transit CV, MR LWB, 3.5 EB, LS 3.23, Silver Ingot, Lthr 10-pt, Al whls, HD alt, Trlr Tow
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post #5 of 16 (permalink) Old 05-05-2019, 04:15:PM
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Dont know about the blood sacrifice and rituals of worship, but I used 600 thinsulate 1 layer in floor, 2 layers in ceiling, and working on 2 layers in the walls,will use 1 layer in a rear wall, and possibly 1 layer of 400 for the curtains behind the seats. Kind of pricey but it only will need done once. As much as all the other items add up to,this don't seem too bad.
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post #6 of 16 (permalink) Old 05-06-2019, 02:49:PM
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Sounds very similar to my build
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post #7 of 16 (permalink) Old 05-06-2019, 03:13:PM
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Hi,
Nothing is going to give you any better an R value per inch than Polyiso. It also has enough bearing strength to support foot traffic as long as there is a thin sheet of plywood over it.


My van has 1 inch polyiso with only 1/4 inch plywood over it and works fine -- you could go down to half inch polyiso and still have descent insulation. This could give you a floor that was only 3/4 inch thick with insulation.



This link has a table or R value per inch for common van insulaiton materials: https://www.buildagreenrv.com/design...ll-insulation/
https://www.buildagreenrv.com/our-co...sion-flooring/ This is a ProMaster, but don't see why it would not work in a Transit.


Gary

Gary

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post #8 of 16 (permalink) Old 05-07-2019, 02:55:PM
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Originally Posted by michenfelder View Post
Based on input from many of you (Thanks to all of you, especially Ed), I placed my order on January 25th and took delivery on 4/26. Here is what I ordered:

I'm a cyclist so my goal is to put 5 bikes in the back (using fork mounts on L-Tracks) a bed above the bikes and two sienna seats (also using L-Tracks) by the sliders.

I have started construction on the floor - see pics. I have a layer of 2mm thick soundproof material (quiet barrier MD from soundproofcow.com) to put down and then I'd like to put down some thermal insulation. Is there something thinner with a better R-Value (~3.5) than 0.5" thick polyiso sheathing?

Thanks!
Jeff
I filled the gaps between the floor corrugations with 2 layers of 1/4” cork. I put one full layer of 1/4” cork over the corrugations, for 1 total layer of cork over corrugations and 3 layers over the non-corrugated valleys. Cork is between 3.6-4.3 R value per inch, so a bit more than thinsulate (3.3, variable depending on the product). Nominally cork is R-4 per inch. I put 1/2” polyiso over the cork, then a 5/8” sheet of plywood over that. I was curious about the compression of both the polyiso and the cork. In effect, neither have compressed, or have compressed very little, as far as I can tell. The cork is a very good sound-deadener.

I used Roxul AFB insulation in my walls and ceiling as well as polyiso and a minor amount of cork to fill in gaps. I filled the gaps with cork, then used spray adhesive to place a 1” layer of polyiso, the AFB, 1” polyiso, then the wall panels. I glued thin strips of polyiso to help hold the AFB in place so between the polyiso supports and compression from the wall panels, the AFB does not move. Roxul AFB is the best fill sound deadener and does a good to great job through a spectrum of frequencies. It does not spall as much as fiberglass but to be thorough I lightly sprayed 3M 90 adhesive to the outer surface to prevent spalling. I’m really happy with the sound in the van. For your design, I think the cork floor would work great, but perhaps you want to save a few inches on the sides to accommodate your gear.
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post #9 of 16 (permalink) Old 05-08-2019, 08:39:PM Thread Starter
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Y'all are great. Thanks for the input. I'm going to go with 1/2" polyiso for the floor insulation. Pics to follow.
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post #10 of 16 (permalink) Old 05-08-2019, 09:25:PM
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If it burns you are breathing cyanide.
https://en.m.wikipedia.org/wiki/Polyisocyanurate
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