- Grand California 600
Thanks for that Rome, great information, shame the grey water tank is not insulated.The sales rep reply's something like this: " They did not explain the colors. It displays all insulated surfaces in wall and ceiling.
It may be that there are different materials in the walls and doors. Can also be so just to see the difference between what is wall and door. But all colored parts are insulation.
You also have about 4cm insulation in the floor, so the whole "cabin" is insulated to withstand winter use."