What we manufacture

Insulated Composite Camper Bodies Built for Upfitting

Foundation Vehicles designs, manufactures and installs insulated composite camper bodies on van, cutaway and truck chassis. A Foundation composite camper body is an insulated, one-piece composite shell — the structural habitat we manufacture and install on a Ford Transit, Mercedes-Benz Sprinter, Ford E-Series or medium- and heavy-duty truck chassis. It arrives square, sealed, and build-ready, so you or your builder can finish the interior without framing out a cargo van or a wood box. The same body is used for four-season adventure campers, composite expedition vehicle bodies, and commercial and specialty vehicles.

Customers describe this product in different ways: composite campers, camper boxes, camper shells, box-style campers, cutaway camper bodies or purpose-built camper bodies. They all point to the same thing — a square, insulated composite habitat, manufactured in Golden, Colorado and integrated with the chassis by Foundation as the final-stage manufacturer. To see how a cutaway chassis with a purpose-built body differs from a cargo-van conversion, read about box van and cutaway camper bodies.

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The full length of a finished white composite body — bright, seamless walls, a locking entry door with window, and a glossy wipe-clean floor

At a glance

What’s true of every Foundation body

Construction: One-piece composite structural insulated panel (SIP)
Insulation: Continuous R11 (vans & E-Series) to R17 (trucks), with greatly reduced thermal bridging
Panel: 1.5" R11 on vans & E-Series; 2.5" R17 on medium/heavy-duty trucks
Materials: Fire-retardant composite — no wood to rot
Interior: 7′ tall × 80.5″ wide, flat 90° walls, integrated mounting
Cab-over: 36″ cab-over habitat with full cab passthrough
Mounting: Torsion-reducing subframe that isolates chassis flex
Compliance: Final-stage manufacturing to FMVSS & OEM requirements

One body, many chassis

The same composite body, installed on the chassis you choose

The body is the product; the chassis is the platform underneath it. We build it in standard sizes and install it on the chassis that fits how you drive and what you carry.

Blue composite camper on a Ford Transit AWD chassis, parked on a forest road in the Colorado high country

Ford Transit Transit 350/350HD cutaway. Nimble gas van, AWD available.

Matte-olive Mercedes-Benz Sprinter AWD composite camper at dusk with mountains behind

Mercedes-Benz Sprinter Sprinter 3500XD cutaway, including the Sprinter 170. Turbo-diesel range and torque.

White Ford E-450 4x4 E-Series composite box camper parked on a forest dirt road, front three-quarter view showing the cab, off-road bumper and beadlock wheels

Ford E-Series 4x4 E-350/E-450 cutaway. The go-anywhere expedition van.

Blacked-out Chevrolet 6500 4x4 expedition camper on a desert road at golden hour near Joshua Tree

Medium & heavy-duty trucks F-550, Ram 5500, Chevy 6500, LMTV.

How it works

What a composite camper body is — and isn’t

Is a composite camper body the same as a box van camper or cutaway camper?

They describe the same idea from different angles. A composite camper body is what Foundation manufactures — the insulated structural shell. A box van camper or cutaway camper is a vehicle that carries one on a cutaway chassis such as the Ford Transit, Mercedes-Benz Sprinter or Ford E-Series. For buyers considering a traditional van conversion, a cutaway chassis with a purpose-built composite body provides another approach: the driving platform remains familiar while the habitat is designed from the beginning as a square, insulated structure. See box van and cutaway camper bodies for the full comparison.

Who buys a Foundation composite camper body?

Do-it-yourself camper builders who want a finished, insulated shell to outfit; overland and adventure buyers who want a four-season habitat; commercial and specialty operators who need a clean, build-ready mobile workspace; and professional builders and manufacturers who build a repeatable product on a consistent body.

What does Foundation install versus what an interior builder installs?

We manufacture the composite body and install it on your chassis as a final-stage manufacturer — the structural shell, insulation, subframe, cab-over, passthrough, and the doors, windows, and hatches you specify. The interior — cabinetry, electrical, plumbing, HVAC, and furnishings — is done by you or your professional builder. We supply the platform; you or your builder complete the fit-out.

What chassis can the body be installed on?

Ford Transit and Mercedes-Benz Sprinter cutaways (see the Transit, Sprinter and E-Series pages), the 4x4 Ford E-Series (E-350/E-450), and medium- and heavy-duty trucks — 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.

Why composite instead of a metal or wood-framed body?

The body is a one-piece composite structural insulated panel: a rigid foam core bonded between composite skins. It carries load on its own, so it is light, square, and stiff. It is fire-retardant, with no wood in the structure to rot or absorb water, and no metal studs bridging the field of the wall to telegraph cold. See composite vs. aluminum camper bodies for the comparison.

How is it insulated?

Every body has continuous R11 insulation without metal studs bridging the field of the wall, and greatly reduced thermal bridging overall, so it holds temperature better than an uninsulated metal van — warmer in the cold and cooler in the heat. The core is closed-cell PIR foam, which delivers more R-value per inch and absorbs very little water. See PIR vs XPS vs EPS camper insulation.

What makes the interior easier to upfit?

The walls are flat and truly square, with integrated mounting built into the panel. Cabinets, benches, and equipment go straight in against a solid, 90° surface — you are not shimming a curved cargo-van wall or framing out a fiberglass shell before the real build can start.

How is the body isolated from chassis flex?

A truck or van frame twists over rough ground. We install the body on a torsion-reducing subframe that pivots between the two, letting the chassis articulate over the terrain while the subframe absorbs the twist — so far less of it is transferred into the composite body and the body stays square. That is what guards against cracked walls, sprung doors, and leaks over time. Read about torsion-free camper subframes.

Can I finish the interior myself, or have a professional builder do it?

Either. Because foundation completes the vehicle as the final-stage manufacturer and provides the documentation required for titling and registration, you can outfit it yourself or take it to any professional builder or upfitter. Our preferred builders can finish the whole interior — electrical, cabinetry, and everything inside.

Do you work with professional builders and production customers?

Yes — that is our builder program. Outfitters and manufacturers build on our standardized composite body as a repeatable starting point and keep their interior, brand, and customer, with private-label options and support from prototype to production.

How is this different from building inside a conventional cargo van?

A cargo van curves in at the roof and walls, has no real insulation, and has to be furred out before anything goes in. A Foundation body starts square, sealed, and insulated, with true standing room and full-width space — so the usable interior is larger and the build goes in faster.

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