There is no “core” in my 2018 NL 8-11. It’s two prices fibreglass.
There is wood frame is to hold the floor up and wood frame for the walls, but they are not structural. I went on a tour of Northern Lite manufacturing and watched them build a number of units as they are all built on a line. Yes there is wood inside, but it’s to hold up the inter walls and floors cabinets etc..
I opened up the compartment where the dump valves are it’s fibreglass outer walls with no wood support.
Here is looking straight up the driver side outside wall towards the front of the camper.
The white box on the wall is the outside shower, the brown wall is the shower stall. The pipes are for the shower, toilet sink... no wood other than for floor support
