My First Build - E350 High Roof

JDB257

New Member
Joined
May 22, 2025
Posts
8
Location
SoCal
Hey Yall - I thought the day of owning a van to build out would never come but here we are. I got a lot of inspiration and info digging through these forums and I wanted to share my build with everyone in hopes it may help someone else out one day.

Here we go...After a long search, I found this local 04 E350 XLT V8 that had a past life as a mobility van. It was built out by a company in Los Angeles. They extended the rear doors, built in a frame for the high roof, put in the vinyl flooring, steel tie downs, bench seating, and did some custom interior fab'n like a wood/foam cover that molded into the factory trim paneling and a vinyl cover cargo area. It eventually was sold off to the guy I bought it from. He had dreams of building it into a camper van but ended up just sitting for years and decided to part ways with it. It needed a bit of work to be road-worthy but seemed like a good situation and checked most of the boxes. I jumped on it.

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First step was cleaning out the interior, and seeing what was under this floor. I started with the plastic paneling, and then worked my way down to the floor. The floor had some steel tie down strips that were bolted through the van so had to get under to unbolt them. I wanted to scrub down the rubber matting in teh cabin area so I unbolted the seats, pulled the mat and discovered the underlayment was a bit wet. I was a little worried what I was going to find when I pulled that up, but turned out to be not too bad, just a bit of some oxidation here and there. So after treating some potential leak points, I grinded away the oxidation and coated the areas with rustoleum. While I was at it, there were some other spots throughout the van floor that I treated as well. So after a handful of weekends, I had a gutted van.

The day I bought it:
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Paneling, flooring removed, helper hammocking:
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After grinding away some oxidation, treating with rustoleum, and cleaning:
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HALF of the junk pile that accumulated
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Hi All...I've been working on this thing alot so I will eventually get to post real time progress but here are some updates I completed some months ago.

Flooring:
I spent too much time trying to figure out a solution for the subfloor and how I wanted to insulate it. I am 6'2" and I had nearly 72" from the floor to the lowest part of the welded support frame in the roof. Having limited head room already, I decided to skip something like XPS/EPS/Polyiso foam insulation options and just do something minimal.

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My plan was to source some minicell foam sheets that were just thick enough that I could cut into strips to fill in the gaps between the corrugations in the stamped floor and lay a plywood floor down on top. One issue I came across was after removing the subfloor and tie down plates I had tons of thru holes that were blown out and created these localized high spots. So instead I thought I could just use a thin sheet on top to cover these protruding holes in addition to the strips for the gaps.

I was jussst about ready to buy some minicell sheets when I came across this company BedRug that made 1/2" pre-cut, vehicle specific floor liners made from closed cell foam. They even had the corrugations cut in them! It was more than double the price of the minicell foam but the time/labor savings in not having to cut all the strips/sheets and bonding them together was more than worth it for me.

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So after I bought the BedRug, I did my best to cover all the holes in the floor. I bought a rubber grommet kit that had various plug sizes and used a combination of these with silicone and JB weld to plug them.

BONUS - Sound Dampening:
While I waited for the BedRug, I decided to work a little on some sound dampening. I am doing 3M Thinsulate on the walls/ceiling so that will help with road noise reduction but I wanted to also attempt to reduce noise from vibrations with some butyl rubber mats. I ended up going with 80 mil KILMAT. I read 20% coverage is all you need so I did the best with covering the larger, non-ribbed areas first but had plenty extra so I just started putting it everywhere. Ended up covering the wheel wells too.

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Once the BedRug arrived (This is the last time I'll say the word BedRug, I promise I am not sponsored :D), I vacummed out the floor and did a test fit. I ended up having to do a little bit of trimming for the factory AC in the back but for the most part it was a good fit!
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More to come!
 
Wanted to ask if anyone happens to be local to SoCal and knows a reputable shop/mechanic that does general maintenance on Fords/Econolines/Vans? Since this vehicle sat for a couple years, I was thinking replacing fluids (oil, diff, transmission, brakes), maybe coolant lines, belts, spark plugs...what would you all suggest I do as far as a new owner maintenance reset? Currently at 109k miles
 
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I used the same floor for my Sprinter build. The sound damping is nice. I didn't glue mine; rather used the floor L track to hold it in place. The only issue with this is that with the barn doors open in the sun, it'll heat up and expand, making it a little wavy instead of tight to the floor. Only a minor nuisance; great otherwise.
 
img_9575-jpg.1315131

I used the same floor for my Sprinter build. The sound damping is nice. I didn't glue mine; rather used the floor L track to hold it in place. The only issue with this is that with the barn doors open in the sun, it'll heat up and expand, making it a little wavy instead of tight to the floor. Only a minor nuisance; great otherwise.
Oh sweet, glad someone has had a good experience with this. It seems pretty durable and has a nice texture to it. How did it hold up?
 
Oh sweet, glad someone has had a good experience with this. It seems pretty durable and has a nice texture to it. How did it hold up?
Not sure what happened to the image, but I'll drop it in again.
It has held up very well. As you noted, the texture is good, and it cleans up well. About once a year I wet it down and scrub with a push broom just to clean out within the texture. By the end of the camping season it has trapped a bit of dust and grime. Assuming the pic sticks this time, you can see some of this. That additional section of rug is a heated mat for the colder mornings.
I have a couple spots of higher use and expected it to show some wear or compression there, but no signs yet and I've had it for over 4 years now.
IMG_9575.jpg
 

Twindaddy-SMB - Good lookin setup! What I used it for is a bit overkill hah. I'm putting plywood down on top of it, and then finishing with Loncoin vinyl but good to know it can take the abuse as a permanent floor.
 
Might be too late to the game; but, some input if you’re open.
You need to Topcoat the red oxide primer. It will become porous. I’ve used OIL based Rustoleum with excellent durability. It dries to a Hard (shell) finish.
For filling holes, to avoid creating high spots seen through flooring: Ideally someone on bottom holding a ‘backing block’, regardless, tapping with hammer to as level as possible. Cut slightly oversized pieces of stainless or aluminum screen material for each hole, THEN apply the JBWeld.
 
Might be too late to the game; but, some input if you’re open.
You need to Topcoat the red oxide primer. It will become porous. I’ve used OIL based Rustoleum with excellent durability. It dries to a Hard (shell) finish.
For filling holes, to avoid creating high spots seen through flooring: Ideally someone on bottom holding a ‘backing block’, regardless, tapping with hammer to as level as possible. Cut slightly oversized pieces of stainless or aluminum screen material for each hole, THEN apply the JBWeld.
Shoot, appreciate the advice I did not have a chance to put a topcoat over the rustoleum in most of the areas...As for filling the holes, that is a good idea. What worked for me is I put down some thick tape on the underside of any large holes to bridge the hole so the silicone or JBWELD had a backing to bond to. Then just pulled off the tape after it was cured.
 
For some additional ventilation I threw in a MaxxAir Deluxe fan in the back of the van. I made a frame out of 3/4 baltic birch for the mounting screws to attach to from the topside and a bit of lap sealant to weatherproof it. Thankfully I had a few clamps around to assist.

I planned to use 3M thinsulate throughout the van and had ordered just enough to cover the high roof back to front including the cargo area above the cabin. Nothing too crazy here, 3M 90 seemed to be pretty popular for this application and worked out pretty well.

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That fan is going to be nice. I put two in my airstream trailer. One I used caulking, forget what it was called but I think it was for the joints. Pembro or something. The other I used VHB tape and then caulked around it with another type of sealant that was white. The first one ended up with a leak within a year. Took it off and re fastened it with the VHB tape and caulking around the edge to keep it from drying out. I like that insulatoin you are doing. Nice work.
 

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