consevatory floor

[dick turpin]

Hi all, i have a conservatory floor to tile (6m2), they want ufh. its on a conrete base, should there be some kind of board over the concrete before the ufh is laid?
cheers
Dick

[TheWrightTiler]

prime floor
lay mate and probe and secure with tape
self level

tile it

unless ur a spark connect it up to main

andy

[dick turpin]

I just wasn't sure if you have to insulate first to stop the heat from the mat going down into the floor.

[TheWrightTiler]

you could lay insulation boards on the crete to assist heating but if heights an issu i wouldnt bother, just tell them that it will take a wee bit longer to heat up

andy

[dick turpin]

cheers andy, have a nice day

[timeless john]

It will take longer to heat up as you will be heating up the 75mm below the mat as well.
You are right to think about an insulation board onto the concrete first as it will certainly make the UFH more efficient and save your customer a lot of money in the long run.

[dagger]

i always insulate over concrete, but not always over ply!

warm up times will be increasded dramatically with no insulation over concrete!! 2hrs ish!!!

[dick turpin]

what would be the rough cost of insulation board for 6 m2? what type of board would you recomend? sure it would save ££££s in the long run.

[Dave]

It will save money on the running costs...heating a full slab before you get any transference back to the tiles is very costly..

6mm or 10mm boards ain't that much height increase for the extra benefits it will give..

Uheat have some great prices on the their cement faced insulation boards..

Underfloor Heating | Floor Insulation | Uheat

and here is a nifty measument guide to how many you will need.

Underfloor Heating | Electric | Floor Insulation | Uheat

[dick turpin]

cheers dave, sounds like a silly Q but how would you stick the boards down?

[whitebeam]

A single part flexible adhesive, could prime the screed if it's dusty

[dick turpin]

cheers chaps, as always very helpfull,