Ford Transit Build Guide

Pick the wheelbase and roof height from your floor plan, not the other way round.

Decide on the drivetrain. AWD costs payload and height but buys you access.

Choose the window layout around where your bed, galley and seating will go.

Add the factory electrical prep — upfitter switches, a second battery and a high-output alternator where offered.

Check payload on the actual spec before ordering. Every option eats into it.

Order your paper patterns while you wait, so the layout is settled when the van arrives.

Measure your actual van. Wheelbase, roof height, and body trim vary — confirm before ordering anything cut to size.

Chalk or tape the full layout onto the cargo floor. Bed, galley, seating, door swings, and the walking aisle.

Sit in it. Lie down where the bed goes. Open the slider and check nothing blocks it.

Lock in window and fan locations now — they drive the framing and the wall kit cuts.

Build a weight budget: water, batteries, cabinets, gear, people. Compare against your payload sticker.

Order paper patterns so you can test-fit shapes before committing material.

Pull the cargo floor, wall liners, and any factory shelving. Work back to front.

Remove plastic trim panels and set the fasteners aside in labelled bags.

Vacuum and degrease every surface. Insulation and adhesive won't stick to shipping wax.

Treat any surface rust or bare scratches now — you will never see this metal again.

Photograph and mark every factory threaded hole. Those become your no-drill mounting points.

Mark openings from a fixed body reference, then check diagonals before you cut.

Drill relief holes at the corners, then cut with a jigsaw and fine metal blade.

Deburr, prime, and seal every cut edge. Let it cure.

Set windows per the manufacturer's method — bonded or clamp-ring — and support them until cure.

Cut the roof fan opening and dry-fit before sealing.

Add trim rings once everything is cured and leak-tested with a hose.

Confirm fan and A/C positions between the roof bows, clear of the rack feet and solar.

Fit the fan adapter or flange and bed it in butyl tape.

Seal the exterior with self-levelling lap sealant and let it cure.

Mount rooftop A/C to its frame, or route the line set if it's a split unit.

Pull power to both units now, while the ceiling is open.

Leak-test with a hose before any insulation goes up.

Clean panels with isopropyl so the adhesive bites.

Cut tiles and apply to the centre of large unsupported panels — doors, side walls, roof bays.

Roll every tile down hard. Air under the foil means it isn't damping.

Do the wheel wells and rear doors — the loudest two areas on a Transit.

Dry-fit the subfloor panels and confirm they sit flat with no rock.

Mark and cut any penetrations for wiring, plumbing, or undercarriage tanks before fastening.

Fasten down using factory threaded points where possible rather than drilling new holes.

Add L-track now if you want floor tie-downs — it has to go in before the finish floor.

Let the vinyl acclimate flat in the van overnight before you lay it. Laid cold, it will relax and move on you later.

Dry-fit the finish floor and check the cutouts land on your L-track and floor penetrations.

Adhere from the centre out, working air toward the edges.

Fit step and trim at the slider and rear to close the edges.

Cover the finished floor with hardboard or ram board for the rest of the build.

Fill ribs and cavities first, lightly — compressed insulation loses most of its value.

Cover the large wall and ceiling areas, working around your window and fan openings.

Leave factory drain paths and wiring channels clear.

Insulate the floor cavity before the subfloor goes down.

Check your window and fan flanges are still accessible before you close anything in.

Set the location of the power system and confirm ventilation and service access.

Run all cable in loom through furring channels, away from sharp edges and heat.

Grommet every pass-through and every hole in metal. No exceptions.

Label both ends of every run before it disappears.

Drop any floor-level runs now — the subfloor goes down next and covers them.

Mount solar brackets and run the roof penetration with a proper gland.

Energise and test each circuit before any panel covers it.

Mount wall furring to the factory threaded points, checking depth as you go.

Run ceiling furring, keeping it parallel and consistent — panel seams will show any drift.

Add the wall-to-ceiling supports where the two planes meet to kill ripple at the joint.

Add furring around the A/C or fan opening if you're running rooftop air.

Photograph the full layout with a tape measure visible in frame.

Fit the front trim kit to close the compound curve at the bulkhead.

Cover the B pillar blobs.

Fit rear and D-pillar trim at the door thresholds.

Add the bulkhead piece if you're separating the cab.

Dry-fit every panel, working ceiling first, then upper walls, then lower.

Confirm cutouts land on your windows, outlets, and switch locations.

Upholster panels off the van on a clean flat surface — contact adhesive, worked from the centre out.

Hang the ceiling first so the wall panels can support its edges.

Fit wall panels, then the wall-to-ceiling supports to close the joint.

Stand back and look down the length of the van for ripple before final fastening.

Hang the headliner shelf and curtain rod once the ceiling panel is home.

Sleep in it — at least one night, mattress on the floor.

Note where you reach for light, power and storage. Adjust the cabinet plan to match.

Check every window, fan and penetration after rain or a hose test.

Re-torque seat bases, rack feet and anything you bolted to the body.

Clean out, inventory parts, and order what's missing for the next phases.

Mount unistrut runs to the van structure at your cabinet heights.

Cap the unistrut edges — the raw channel is sharp.

Hang upper cabinets first, while you still have floor space to work in.

Set the galley run: sink, fridge, pantry, drawers. Level as a set, not one at a time.

Build the bed or sleeper platform and check your door swings.

Connect plumbing and electrical to the fixtures and test everything.

Fit swivel seats and table mounts last, once the aisle is clear.

Mount the power unit and battery in their cabinet with ventilation and service access.

Land the main battery cables and fit the main fuse and disconnect.

Connect alternator charging through the DC-DC charger or the kit's alternator input.

Wire the solar input and check polarity before connecting.

Connect the shore power inlet.

Bring circuits up one at a time and check every fuse and connection under load.

Label the panel so anyone can kill power in an emergency.

Mount tanks and confirm fill, vent and drain routing clears the cabinet runs.

Mount the pump on a bracket with isolation — hard-mounted pumps transmit noise through the whole van.

Run supply and drain lines, supported every couple of feet so nothing sags or chafes.

Pressure-test and leave it overnight. Check every joint in the morning.

Insulate any line that runs where it could freeze.

Confirm heater location, then check exhaust and intake routing all the way out before drilling.

Install the fuel pickup per the manufacturer's procedure.

Mount the unit, route combustion air in and exhaust out, supported at spec intervals.

Fit the seat base trim to close out the install cleanly.

Commission the heater and run a full cycle before anything covers it.

Fit rear and slider door storage panels.

Cut and fit window covers, labelling each one to its window.

Hang the privacy curtain behind the cab.

Fit bug screens at the slider and rear.

Mount the roof rack to the factory roof points, sealing every fastener.

Fit the rear or side ladder.

Mount the side steps.

Mount the awning and any exterior lighting; run the wiring through sealed glands.

Move the solar panels to the rack if they aren't on brackets.

Measure and post the finished clearance height in the cab.

Torque-check everything after the first 300–500 miles.