The Cabby method
The chief reason for our comfortable indoor climate is the Cabby method, which offers by far the best insulation on the market.
The Cabby method includes well-proven technology used in the construction of all our caravans and is based on an extremely highly-insulating material (polyurethane) which creates a minimum of seams in the walls and ceiling. This construction keeps the cold out in the winter and the heat out in the summer. It also helps give the caravan increased stability and road-holding capability.
How the Cabby method works
The sides, floor and roof of the caravan are constructed in complete units. We inject highly-insulating polyurethane material between the outer and inner walls, in the roof and the floor. The polyurethane expands and hardens in every nook and cranny of the unit. A stable sandwich structure is formed, with plywood on the inside and strong aluminium panels on the outside. The construction is immensely strong with very few wooden joists, thus minimising the risk of thermal bridges.
Polyurethane consists of insulating, microscopic gas bubbles with a closed cell structure. These are resistant to moisture, an important property due to the fact that as little as one per cent of moisture in the material will reduce insulating capacity by 25 per cent. Damp insulation is also, of course, a breeding ground for micro-organisms and mould.
The insulation we use is proven to have good ageing properties.
Polyurethane insulation retains its essential qualities for well over 100 years and the technology is increasingly gaining ground as an effective insulation material, especially in the building industry where energy issues have come to the fore.
The superior insulating qualities of polyurethane are becoming increasingly in demand.
The type of polyurethane foam (PUR) used in Cabby caravans has a thermal conductivity of 0.024 W/m° K while insulation of the Ecoprim type has a thermal conductivity of 0.030 W/m° K. This means that Cabby’s PUR insulation has a 25 percent better insulating capacity (K value) than Ecoprim insulation.
A small comparison
Cabby has 32 mm PUR insulation in the walls and roof, and 36 mm PUR insulation in the floor. To highlight the difference, comparisons can be made with other materials used to insulate caravans and buildings. The conclusion is obvious – even though other caravan manufacturers use thicker insulation than Cabby, they do not have sufficiently thick insulation to approach Cabby's insulating qualities.