Laying heating pipes in solid floors

[milou22]

Forgive me please if this has been covered on numerous occasions but I've just scrolled through a few pages and couldn't spy it so here goes...
Having built an extension with solid floors I am now at the stage when a 3 inch screed is all that remains to complete floor heights. I need to run central heating pipes to half a dozen radiators and would much prefer them to be 'buried' as opposed to visible. I am considering using either copper or plastic pipework but would be very grateful for info regarding current regs on boxing/wrapping/jointing of pipework under/through the screed.
Any help very much appreciated, thank you.
Milou22 (Paul)

 

[bengasman]

Plastic barrier pipe without joints, sleeve it in flexible conduit. Make sure you only have smooth bends

 

[milou22]

Thanks bengasman, most grateful.
Do I assume that you'd use 90's to bring pipes up directly beneath rad flow/returns and perhaps box around this for access?

 

[bengasman]

Do I assume that you'd use 90's to bring pipes up directly beneath rad flow/returns and perhaps box around this for access?

I wouldn’t. though you get up to 50 years warranty on the pipe itself, the joints are still the weak point. Relatively speaking. If half possible, you keep everything that is not accessible joint free. Prevention is better than a cure.