I was tooling around a while ago and noticed that there is an opening on both sides of the steps into the flooring.You can see insulation in there and have noticed since I have had the Airstream that dirt water and the outside enviroment is getting in there.I believe stopping this would possibly help a lot with things such as rotting floor,insulation becoming a house for some unknown creatures,wasps,bugs,mice,etc,etc.It is fairly large and seems to be there for no reason.I am wondering if there is a reason for it being like this.I would like to block it off but not completly closed.Just enough of a crack to let a little bit of breathing into the flooring.I will take a pic and post it here in a moment.Thanks.