Is too much insulation bad???

[pearl1]

Hi

My builders have left the required floor level in my new conservatory 150mm short of where it should finish. At present the concrete slab is 350mm below finish floor level, I will be putting down 150mm insulation, under floor heating and then a 75-100mm screed, this will leave a 100mm left to finish floor..... Can I simply put an extra 100mm insulation down??? This would give me 250mm in celotex, I know it's over the top but I get this stuff for pennies. Would there be any future movement? My builders seem to thinks its fine?!!!

 

[pearl1]

Same old problem on this forum..... never any responses!!

 

[noseall]

The only problem can think of is if the insulation boards do not sit flat with the sub-floor thus creating a void and a weak spot, otherwise crack on.

Same old problem on this forum..... never any responses!!

What did you mean by this?

 

[RedHerring2]

Same old problem on this forum..... never any responses!!

What did you mean by this?

I bet you don't get a response to this, noseall.