Note there is still about a 2" gap left. I decided to use 3/4" plywood in the LP compartment floor. And this plywood will extend under the LP compartment cover and but up against the aluminum floor.
The aluminum decking is 1" thick. The orignal plywood on my 1978 coach was only 3/4". I tried but there was no way I was going to get the 1" thick decking underneath the LP cover without cutting up the fiberglass. I chose not to do that. Rather just to have a few inches plywood under the water tank. If it does get wet, at least it will be a lot easier to replace than the entire floor would have been.
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