Porch flooring

[Phil4242uk]

So having moved into a new home we need to renovate the porch. Simple enough except previous owners had simply laid carpet on these slabs. I want laminated flooring. I am in 2 minds. Do I raise the floor slightly with a wooden base and then door underlay and then laminate it or do I just put down a moisture resistant membrane onto the slabs with thicker underlay? The second option is the most cost eff3ctive but what is the right way? Any help would be great!
Thanks all

 

[Notch7]

If the door thresholds are high -they look to be, I would raise the floor up -then you benefit from having less of a step at each door

And the floor will be a bit warmer, so less risk of condensation.

the size looks like one sheet of 18mm plywood would be big enough (may need cutting to fit in).

 

[Tigercubrider]

could a single slab of celotex type insulation work?
Most porches are "outside" in that they are not heated or expected to be occupied.

 

[Phil4242uk]

That’s a great idea. I can grab some of that from wickes