Van Insulation Calculator
Gear to insulate your van
Armaflex first layer on metal (built-in vapor barrier), Thinsulate on top for thermal resistance, aluminum tape to seal seams. What I used on my 3 vans.
Independent and free thanks to your clicks
Links marked with * are affiliate links. If a purchase is made through them, I receive a commission at no extra cost to you. The editorial selection and product evaluation are not influenced by commission rates. Your click helps fund this free tool.
Armaflex AF 19mm
The vanlife insulation standard. 19mm closed-cell elastomeric foam, R≈3.3, vapor-tight.
3M Thinsulate SM600L
Premium lightweight insulation. Breathable, hydrophobic, non-settling. R≈4.3 for 1 inch.
Reflectix reflective insulation
Radiant barrier with bubble foil. Supplements insulation on windows and roof.
Aluminum foil tape 2"
Seal insulation seams and create a continuous vapor barrier. Essential.
Why insulate your van properly?
Good insulation reduces condensation, improves thermal comfort in summer and winter, and lowers your heating energy consumption. It's the most important step in your van conversion.
FAQ
What's the best insulation for a camper van?+
Thinsulate SM600L (R=1.14, λ=0.035) is the most popular: breathable, anti-condensation, easy to install. PIR (R=1.36, λ=0.022) offers the best thermal performance per cm. Armaflex (R=0.58, 19mm) is ideal as a first layer on bare metal thanks to its built-in vapor barrier.
How much does van insulation cost?+
Budget ranges from €180 (XPS, ~23 m²) to €575 (Thinsulate) for a Ford Transit L2H2. The price depends on the material chosen and zones covered. Ceiling and walls represent 55% of the total area.
What thickness of insulation for a Sprinter?+
40mm of Thinsulate or wool for a good comfort/space compromise. 30mm PIR to maximize interior space (best R per cm). Combined: 19mm Armaflex on metal + 25mm Thinsulate on top.
Do you need a vapor barrier in a van?+
It depends on the material. Armaflex has a built-in vapor barrier. Sheep wool requires a separate vapor barrier (mold risk). Thinsulate is breathable and manages moisture naturally. XPS and PIR are waterproof.