I bought a 1994 ACE Jubilee last April what i found had damp at rear side of van , i resealed all of the roof fittings and replaced a section of ceiling board and 2 ceiling timbers, I check the area regular'y and no leaks now, Only problem i have is a damp smell at rear of van it is not as bad as it used to be but still there despite using a moisture mate container and replenishing granules when required any ideas if anything else on the market ?.