Resealing DRV A/C Dometic Penguin II Unit On Roof

Those lag bolts that hold a/c unit on to the roof on many of the new RVs with no visible means of attachment on the inside are a huge source of possible water as they are outside the a/c seal and/or shroud. Be SURE they are properly sealed.
Many a/c units are leaking into the roof on these types of a/c units unknow to the owner since it is not likely to show up on the inside due to the insulation and ceiling panel particularly if a vinyl/padded ceiling.