Nov 05, 2021 · Campervan Insulation and Ventilation: Foam Boards, Roof Vents & Condensation. Your camper van insulation and ventilation is integral to the comfort level of your van life. A well ventilated van will help remove hot air, cooking smells and water vapour so will smell fresh. A well insulated van will be warm and cosy in the cold and cool in the heat.