I had to measure it . Its 1110mm to the top of the base then you have the mattress. Since we got ours you now can get retractable ladders as ben suggested which would be heaps better. Our ladder can be unstable at times depending on the ground we are camped on and it because of the shape it tends to take up a lot of room in the trailer.
Never argue with a fool! They drag you down to their level, and beat you with experience!
2007 Outlander, 2005 MODCON Redlander, 2003 DMH Overlander and four human Redlanders!