Commercial & specialty vehicles
Foundation Vehicles manufactures insulated composite box bodies — engineered structures for commercial, fleet and specialty vehicles — and installs them on van, cutaway and truck chassis in Golden, Colorado. It is a structural composite body, not a generic dry-freight cube or a conventional aluminum delivery box.
You may know it as a composite box body, insulated box body, van box body, truck box body or custom vehicle body. The idea is the same: a purpose-built body, integrated with the chassis, that arrives ready for your fit-out.
The definition
An insulated composite box body is a vehicle body built from structural insulated composite panels — a rigid foam core bonded between composite skins — instead of a metal or wood frame covered with sheet. Foundation’s body carries continuous insulation through the wall and is installed on the chassis on an engineered subframe.
Compared
| Feature | Foundation composite box body | Conventional metal- or wood-framed box |
|---|---|---|
| Wall construction | A structural insulated panel: closed-cell PIR foam bonded between composite skins | Framing members (aluminum, steel or wood) covered with a skin, with insulation added between or behind them, if at all |
| Thermal bridging | No metal stud frame runs through the wall, and a thermal-break extrusion joins the edges | Framing members can carry heat through the wall |
| Surfaces | Non-porous, wipe-clean composite with no wood in the structure | Varies by build; wood framing and linings can absorb moisture |
| Interior | Flat walls and true 90° corners with integrated mounting | Depends on the body and where its framing sits |
| Chassis integration | Installed by Foundation on an engineered subframe, with final-stage manufacturing to FMVSS and OEM requirements | Varies by body maker |
A general comparison — individual conventional boxes differ, and the right choice depends on the mission.
Why composite
Continuous insulation is part of the structure, not added afterward: R11 in the 1.5-inch panel on van and E-Series bodies, R17 in the 2.5-inch panel on trucks. That supports efficient heating and cooling and a stable interior for crews and equipment.
The body is composite with no wood framing, so there is no wood to rot and none to absorb spills, odors or grime.
A non-porous, wipe-clean interior suits work that has to be cleaned every day, such as grooming, veterinary and medical use.
With no metal stud frame running through the wall, there is less of a path for heat to bypass the insulation than in conventional metal-framed construction. See thermal bridging explained.
Entry doors, dual-pane windows, access hatches and skylights are specified to your layout. See the windows, doors & hatches catalog.
Foundation installs the body on a torsion-managing subframe and performs final-stage manufacturing, so the body and chassis are designed to work together. How the subframe works.
A standardized body gives fleets and outfitters a consistent starting point from the first unit to the tenth. See builder and production programs.
Chassis and sizes
Foundation installs its composite body on cutaway vans and on trucks. Van and E-Series bodies come in standard sizes from 72.5 to 95.5 square feet of walkable floor, with a 7-foot interior height. Truck bodies are custom-sized to the chassis, with a thicker 2.5-inch panel. If you already run a chassis, we can usually build on it.
Where it fits
The same body suits mobile grooming and pet care, veterinary and spay/neuter clinics, medical and dental clinics, fiber and utility field labs, survey and inspection, mobile showrooms, command and communications units, and other mobile work. Foundation builds the body; the layout, equipment and systems are fitted to your mission.
These are applications the platform is built for, not a claim of past builds in every one. Specialty uses are engineered project by project, and not every application is a standard production product — tell us the mission and we will say plainly whether the body fits.
See commercial and specialty use casesScope
Outfitters and manufacturers can build on Foundation’s standardized composite body as a repeatable starting point and keep their own interior, brand and customer, with private-label options and support from prototype to production. See builder programs for how it works.
Common questions
A composite box body is a vehicle body made from structural insulated composite panels rather than a framed metal or wood box. Foundation’s panel has a closed-cell PIR foam core bonded between composite skins, so the wall is insulated, stiff and square.
Foundation’s wall is a structural insulated panel with continuous insulation and no metal stud frame running through it, joined at the edges with a thermal-break extrusion. Conventional metal-framed boxes have framing members that can carry heat through the wall. Foundation builds engineered bodies for commercial and specialty use rather than a generic dry-freight cube.
Ford Transit 350/350HD and Mercedes-Benz Sprinter 3500XD cutaways, the Ford E-Series E-350/E-450, and medium- and heavy-duty trucks including Ford F-450/550, Ram 5500, Chevrolet 4500–6500 and military-grade LMTV/FMTV. If you already run a chassis, we can usually build on it.
Yes. Every body has continuous insulation: R11 in the 1.5-inch panel on van and E-Series bodies and R17 in the 2.5-inch panel on trucks, around a closed-cell PIR core.
In Foundation’s standard scope, electrical, HVAC and mission-specific systems are installed by you or your integrator. If your project needs provisions planned into the body, tell us what you need and we will confirm what we can accommodate.
No. The platform suits many kinds of mobile work, but each specialty application is engineered project by project and is not necessarily a standard production product. Describe the mission and the chassis and we will tell you honestly whether it is a good fit.
Start a project
Tell us the mission and the chassis you run — we'll spec a body that holds up in daily service, and send pricing for your build. Prefer to talk? Call or email us directly.
The message form is loading. You can also email info@foundationvehicles.com or call 720-610-1562 any time.