40 m² of Armaflex ChezMoi calculated to insulate your Citroën Jumper L3H3

This kit brings together all the Armaflex ChezMoi you need to insulate a Citroën Jumper L3H3 for a campervan conversion: 1 roll of 10 mm, 5 rolls of 19 mm, 4 rolls of Tape and 1 Cleaner, with a pair of gloves and a utility knife included free. Quantities are calculated for the Jumper L3H3: order everything at once, with no need to estimate the area or add missing items.

Armaflex ChezMoi is an elastomeric foam made in Europe using Armacell technology. Its self-adhesive side sticks directly to cleaned metal bodywork, with no extra glue needed. The closed cells also act as a vapour barrier (μ> 7 000): there’s no separate vapour control layer to install, and less condensation on the metal bodywork.

With a thermal conductivity of 0.035 W/(m·K) and a service temperature range of −50 °C to +85 °C, it insulates against both cold and heat, whether your Jumper becomes a campervan, a work van or a motorhome-style van conversion. The A+ rating (ISO 16000, VOC-free) and Microban® antimicrobial treatment integrated into the material matter in a space where you sleep. Its fire performance follows the FMVSS automotive standard, and the manufacturer guarantees the material for 10 years.

Using the kit is straightforward: the 10 mm goes on the floor and pillars, the 19 mm on the walls and ceiling, the Tape seals the joints, and the Cleaner cleans the metal bodywork before installation.

Armaflex ChezMoi 19 mm: insulating the walls and ceiling

The 19 mm version is the standard thickness for large areas. It provides the most insulation where space allows: the Jumper’s side walls, doors and ceiling. The kit contains 5 rolls, covering 30 m².

• Thickness: 19 mm
• Roll size: 6 m² (6 m × 1 m)
• Thermal conductivity: λ = 0.035 W/(m·K) at 0 °C
• Vapour barrier: integrated, μ> 7 000
• Service temperature: −50 °C to +85 °C
• Fire performance: FMVSS automotive standard
• Air quality: A+ rating (ISO 16000), VOC-free
• Antimicrobial treatment: Microban® integrated into the material
• Warranty: 10 years (manufacturer)

Armaflex ChezMoi 10 mm: insulating the floor and pillars

The 10 mm version fits where space is tight: the floor, deep structural reinforcements, wheel arches and pillars. It preserves headroom while insulating the metal bodywork. The kit contains 1 roll, covering 10 m².

• Thickness: 10 mm
• Roll size: 10 m² (10 m × 1 m)
• Thermal conductivity: λ = 0.035 W/(m·K) at 0 °C
• Vapour barrier: integrated, μ> 7 000
• Service temperature: −50 °C to +85 °C
• Fire performance: FMVSS automotive standard
• Air quality: A+ rating (ISO 16000), VOC-free
• Antimicrobial treatment: Microban® integrated into the material
• Warranty: 10 years (manufacturer)

Tape, Cleaner, gloves and utility knife: preparation, cutting and sealing joints

The Tape seals the joints between sheets to limit thermal bridging, while the Cleaner degreases the metal bodywork for good adhesion. The kit contains 4 rolls of Tape, providing 60 m of tape, and 1 Cleaner. A pair of gloves and a utility knife are included free for handling and cutting the insulation.

• Tape: 15 m × 50 mm adhesive roll, 4 rolls in the kit
• Cleaner: solvent-based Armaflex cleaner, 1 L bottle, applied with a cloth, 1 included in the kit
• Gloves: 1 pair, included free with the kit
• Utility knife: 1, included free with the kit

Compatibility: Citroën Jumper L3H3

The kit is sized for the load area of a Citroën Jumper L3H3 panel van (from 2006): 3 705 mm long, 1 870 mm wide and 2 172 mm high, with 1 422 mm between the wheel arches. These dimensions are indicative: measure your vehicle before installation, especially if it has already been converted.

Please note: The partition separating the cab is not included in the kit’s coverage.

The closed cells of Armaflex ChezMoi already act as a vapour barrier, so no additional vapour control layer is needed.

The Jumper L3H3 shares its bodywork with the Fiat Ducato and Peugeot Boxer: see the Fiat Ducato L3H3 and Peugeot Boxer L3H3 kits. Other Jumper sizes: L1H1, L1H2, L2H1, L2H2 and L3H2.

How do I install the Armaflex ChezMoi kit in a Citroën Jumper L3H3?

Armaflex ChezMoi is self-adhesive: it can be installed without glue, using a few simple tools, and requires no special skills. Just follow the steps in order. Our blog article on installing Armaflex explains each step in detail.

1. Prepare the walls. Identify the areas to insulate. If you plan to fit wood panelling, install the fixing battens first.
2. Clean the walls before installation. Dampen a clean cloth with Cleaner and wipe down all the metal bodywork: it must be clean and free of grease for the adhesive to bond. Cleaner contains a solvent and gives off fumes: wear a mask and work outside if possible.
3. Mark out. Mark the dimensions of each area on the non-adhesive side of the insulation, starting with the floor and pillars (10 mm), then the walls and ceiling (19 mm).
4. Cut to size. Put on the gloves included free and cut the sheets to shape with the kit’s utility knife, or with an Armacell knife kit if you prefer. The foam cuts cleanly.
5. Stick in place. Peel back the protective film as you go, pressing the sheet onto the metal bodywork from the centre outwards to push out any air.
6. Seal the joints. Apply Tape over every join between two sheets to limit thermal bridging.

Kit technical specifications

The kit also contains 4 rolls of Tape (15 m × 50 mm), 1 solvent-based Cleaner (1 L bottle), plus 1 pair of gloves and 1 utility knife included free.

Frequently asked questions about insulating a Citroën Jumper L3H3

How can I tell if my Jumper is an L3H3?

The size combines the length (L1, L2, L3) and roof height (H1, H2, H3). Measure the usable length of the load-area floor: approximately 2 670 mm for an L1, 3 120 mm for an L2 and 3 705 mm for an L3. Then measure the interior roof height: approximately 1 662 mm for an H1, 1 932 mm for an H2 and 2 172 mm for an H3. For an L3H3, allow for 3 705 mm by 2 172 mm.

Do I need DIY experience to install this kit?

No. The insulation is self-adhesive and can be cut with the utility knife included free in the kit: clean, cut, stick, then seal the joints with Tape. The six steps in the installation section are all you need, and the video shows how it’s done.

Do I need to add glue?

No, the self-adhesive side of Armaflex ChezMoi sticks directly to the metal bodywork. The Cleaner is only used to degrease it so the adhesive bonds properly.

Is this kit suitable for a Jumper-based motorhome?

It is designed for an L3H3 Jumper panel van being converted into a campervan or motorhome-style van. For a coachbuilt or low-profile motorhome, the living area has different surfaces: measure them before deciding how much Armaflex you need.

Can I double the thickness for very cold conditions?

Yes, you can layer two sheets in exposed areas if you travel in very cold conditions. You will need to add rolls of Armaflex ChezMoi 19 mm to the kit.

Armaflex ChezMoi or Armaflex AF: what’s the difference?

Armaflex ChezMoi is the successor to Armaflex AF for vehicle conversions: the same self-adhesive foam, with fire performance in accordance with the FMVSS automotive standard. Our article compares the two ranges point by point.

Is there a kit for a Ducato or Boxer of the same size?

Yes: the Fiat Ducato and Peugeot Boxer each have their own L3H3 product listing. See the Fiat Ducato L3H3 kit and the Peugeot Boxer L3H3 kit.

Complete the insulation and interior finish of your Citroën Jumper L3H3

This kit insulates the metal bodywork in one go. To take the insulation further with fibrous materials, explore our campervan insulation kits.

For the floor, add a layer of 4 mm cork underlay on a roll beneath your floor covering: it reduces the feeling of a cold floor and reduces vibrations and road noise. Explore the full cork insulation range.

For the wall finish, start with a stretch carpet lining sample: you can choose the colour (light grey, dark grey, anthracite, black or beige) right inside your van before ordering the van carpet lining.