Insulation above floor level

johneym

Folks,

my plumber duly plumbed the house and has gone.I am filling in the channels he left.Lo an behold, they are very shallow.I filled them in but the insulation is visible level with,an in places protruding above, the floor. Not only this, but now all I filled in is broken up again as people walk on the channels and the insulation is soft underfoot.I am putting 6mm fiber board and 12 mm laminate on top. I did the test today and down the lenght of the coridor where he dug 1 in the middle, 2 boards will meet over the channel.
Now the laminate is thick but still its at a joint where all the trafic will be. Is there a danger of the laminate sagging here?
So I routed up all the channels again and remixed the concrete with a watery very strong cement content.Now Im finished. The insulation is as before clear to be seen but will the extra strong concrete mix be enough to withstand the weight? My worrry is , regardless of the concrete mix,it has no power as its only a few mm on insulation.

Any ideas,?

thanks in advance

John

johneym

any ideas?

yoshytoshy

Sorry ,but your plumber sounds like a pox. He should have allowed for plenty of cement.

What I'd do is get 8mm ply instead of the fibre board and you'll get some support.