What does aluminum framed laminated floor and roof mean?

I don't mean to sound "dumb" but what does this mean in regards to the construction? I have searched the Heartland website and can't seam to find anything on it.

The wall framing is made of aluminum tubing. Like the 2x4 framing in your house although not 2x4. It is glued and sandwiched, along with foam insulation, between the outer skin and the inside skin. Then heated to set the glue. That is lamination.
The floor and roof are done the same way. OSB along with the ceiling material, and roof trusses form the roof.
The floor is OSB and foam.
Hope that clears it up some.
I'm no expert.

Peace
Dave

I did happen to find a picture of what the construction of the roof and floor look like so that helped me a lot to better understand.

Here is a nice video that shows the lamination process at the factory.

https://youtu.be/VWokMmlKmT8