Is it worth breaking this old porch floor up?

[Ian H]

Its solid but not insulated, is it worth the effort to add 100mm of Celotex in a small porch? It’s 270mm thick so would think sand, visqueen, Celotex then concrete.

Otherwise I thought to cut it back a few inches and feed some Celotex vertically between the floor and new walls.

 

[noseall]

As with any structure, it's the quality of construction which dictates the future performance. Also, what do you want from it?
There is a risk of a mouldy (smelly) floor, if it becomes a condensation trap. If it just going to be somewhere to keep the rain off whilst you take wet outer clothing off, then don't bother.

 

[Ian H]

She will want it more of a fancy entrance so I think i’ll break it up. There’s 2 layers to it, brick and concrete, then broken roof tiles and concrete so probably is best off being done again. Thanks

 

[Ian H]

Breaking it up was easy, getting rid of all the crap will be a pain!!