Concrete floor cracked over piping

carveone

Hi all,
There was a 'give' in the floor between the hall and the living room in this first floor flat. So I pulled up the carpet and cut away this rubber felt stuff to see cracked concrete. I could use a gloved hand to pull all the bits away - there are four foam clad plastic pipes underneath - heating at least plus hot water maybe - and I could just pull the concrete away for 1m+ above them - it was only a 2-3mm thick skim over the foam!

I'm just going to put a ply or metal plate over this but should I fill this trench with something first? - sand or insulation or some such? What is the usual process in under concrete piping? Thanks...

agusta

The usual process would be that the pipes would be 3 inches lower,insulated and then filled with concrete.In your case the pipes at nearly at the top of the floor.if you can put plywood or a metal plate over the pipes it will be perfect.If you want you can add more insulation around the pipes

carveone

Thanks! I think if I put them lower I'd drop into the apartment below! There was enough space on either side of the pipes that I thought I should try and put something solid like sand there - which might stop any plate above from flexing when I walk on it - but I have some marine ply handy and an awful lot of polystyrene from a new fridge so that should do the job... Cheers, Conor