Just had van in for first service (for us anyway!). Routine checks all came up ok. Bit concerned as told of delamination to area in front of shower room. All I know is that floor creaks when I go to loo! Also given "water ingress report" with diagrams of caravan and damp readings in areas of van. Scale 6-15=ok,17-19=borderline, scale 20-60=water ingress. Areas of our van show readings of 15 generally but 20 and 22 to roof vents. Bit off-putting as dont fully understand them. Anything I can do to DIY remedy? Should I be worried? Van is 1995 sterling Europa 500l. Ta. On move to Wales tomorrow!