Condensation is the quiet killer of comfort. One cold night, a closed vent and two people breathing can dump up to a litre of water into a compact van. Left unchecked, that moisture becomes musty cushions, black mould in window rubbers and swelling furniture boards. This guide gives UK-ready tactics for pop-tops and high roofs, so you stay dry, warm and worry-free. Need a winter health check, thermal screens or a roof fan? Explore Services , see winter-ready Vans for Sale , o