Underfloor heating insulation

[Dallypro]

Hi All

Hopefully a nice straight forward question.

Note I am a DIY-er!

I am in the process of having a kitchen extension built and have left 80mm for installing an underfloor heating system.

I understand that often the 100mm celotex floor insulation as required by building regs is left above the slab, however ours has been put underneath - so I need something to reflect the heat and give me something to clip the pipes into. What do I use?

The system will be a single zone kit that is branched off of the existing combi-boiler powered radiator system. One of the kits that comes with a mixed/pump unit.

Total area of the UFH will be around 12m2.

Appreciate any help

Cheers

Dallypro

 

[endecotp]

I understand that often the 100mm celotex floor insulation as required by building regs is left above the slab, however ours has been put underneath - so I need something to reflect the heat

No you don’t.

The heating will warm the slab, which will slowly release the heat into the room. The insulation will prevent the heat from warming the ground underneath.

 

[Dallypro]

Thanks for the reply. Perhaps I have been misinformed, but I thought that the aim was to heat the screed that you put over the top, not the actual concrete foundation slab?

I have not seen any system where the pipes are laid directly onto the slab, they always have some form of insulation under them so that the heat goes up not down?!?

If the pipes do go directly onto the slab, am i correct in thinking I would need to use a rail clip system to keep them in place?

Thanks again