Why Insulation Matters in the UK
UK vans face: 1,500mm+ annual rainfall, 200+ days of precipitation, temperature range -10°C to 30°C. Proper insulation prevents condensation, reduces heating costs, and ensures year-round comfort.
Insulation Materials Compared
- XPS (Extruded Polystyrene) - £20-£30/m², R-value 5 per inch, moisture resistant, good thermal performance
- EPS (Expanded Polystyrene) - £15-£25/m², R-value 4 per inch, budget option, needs vapour barrier
- Mineral Wool (Rockwool) - £30-£45/m², R-value 3.3 per inch, fire resistant, excellent sound dampening, needs vapour barrier
- Sheep's Wool - £45-£65/m², R-value 3.5 per inch, natural moisture regulation, sustainable, premium price
UK Building Regulations
Part B (Fire safety) and Part L (Conservation of fuel and power) apply. Ensure insulation doesn't block ventilation. Condensation control: vapour barrier on warm side of wall structure.
Installation Order
- Clean and seal all surfaces
- Install insulation material
- Add vapour barrier (warm side)
- Install interior panelling
- Seal all gaps and joints
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Last updated: 26 August 2026