Hi! I have checked damp on alu-tech Bailey caravan with my moisture meter (10-20£). When I checked from outside, most of body show 100% damp, but rear pillars 0%. From inside, in the same locations, it is 0%. On the floor, 35% near toilet and front table, on further places, near 0%. I wonder if the moisture meters work on outer alu or GRP materials. I don't know how far 35% is from the professional check results. The rear outside right corner plastic has a filled crack, is that why toilet floor damp? Is this serious problem? The seller have serviced and damp checked every year from new. The last month's check doesn't show any percentage or damp comments, but one or two damp reports under 15% seven years back. The caravan looks good condition. Should I believe caravan service reports?