20mm thick marble

[ms.tiles]

hi all

been to look at a job and ive been booked in, 20m conservatory with undertile heating.
now they have had their heads turned by the marble work top fitter. he has said that in hampstead heath and other posh london places people are having slabs of marble cut into 1500x1000mm tiles and put down on the floors.
ive got the underfloor heating work there if they go for slate(i lay) or the marble. thing is the marble is atleast 20mm thick, would this effect the heating in anyway as its the only form of heating going into the conservatory or would it heat up fine.
obviously any effect on the heating would go in my favour.

any info would be appreciated

[Mike]

i didn't think ufh heating would be sufficient to heat a conservatory as a primary heat source regardless of what tiles were laid. the heat would still get through the marble, it just may take longer to heat up. why not suggest the customers looking for a better price on the marble elsewhere (you may then get the job)

[Thespanishtiler]

how many watts per m2

any insulation under the ufh

[Gall.B]

Once they are warm they will be fine.

[Dave]

If a 200w system , then that is sufficient for a primary heat source.

[deanotile]

i didn't think ufh heating would be sufficient to heat a conservatory as a primary heat source regardless of what tiles were laid. the heat would still get through the marble, it just may take longer to heat up. why not suggest the customers looking for a better price on the marble elsewhere (you may then get the job)

You have to be kidding m8 I’ve had ufh in my conservatory for years the radiators are useless so don’t even turn them on in there since the ufh went in.

[ms.tiles]

hi Mike
the marble work tops are all booked in ready to go this week.
with regards to the heating,warm up said that it should be warm enough with insulation boards.
i think i'll call them again tomorrow and get them to confirm it,they dont want tile warmers they want room heat.
their plumber said their boiler couldnt run another radiator off it so im not sure what their choices are now if warm up will not heat the room.
thanks for your reply

[hillhead]

I fitted 2300 x 1300 x 20mm marble lately with wet UFH.
Hard and heavy work and cost a fortune, I have to put a red rojo border around too.
No probs with heat there I can say.

[ms.tiles]

hi all
sorry you was all replying while i was writing.
there will be 10mm insulation boards under the warm up then below that is a 3inch screed with insulation below that.
it will be the 150 watt warm up single wire system.
does everybody agree that the marble will take longer to heat up and warm the room??
many thanks all

[jay]

[QUOTE=ms.tiles;568928]hi all
sorry you was all replying while i was writing.
there will be 10mm insulation boards under the warm up then below that is a 3inch screed with insulation below that.
it will be the 150 watt warm up single wire system.
does everybody agree that the marble will take longer to heat up and warm the room??

yes it will take longer to warm up ,but may i ask whats under the screed as far as substrate thanks (ufh is just to take the chill off the tiles not a main source of heating)

[Mike]

You have to be kidding m8 I’ve had ufh in my conservatory for years the radiators are useless so don’t even turn them on in there since the ufh went in.

My local tile shop used to supply warm up ufh and said it will be sufficient to heat an insulated new build but not an old house or conservatory. Maybe its warmer in brum than around here lol

tapatalk on my HTC

[Dave]

Do warm up not do a 200w system then..?

[jay]

Do warm up not do a 200w system then..?

yes they do Dave but isn't ufh just a primary source of heating not a main

[ms.tiles]

hi
im not sure whats under the screed,isnt it usually selotex or whatever it is,big foam(ish) type boards,its a new build by everest so should be to building regs and well insulated.solid end walls with small walls in front with glazed front on top and glazed roof. will have an extension to the kitchen into it and an island,not sure if hob or cooker will be in the room.
im not sure if cost was an issue with the 200w warm up but if they are buying marble then surely money shouldnt be an issue,cant be that much difference between the 150w and 200w.
just on another note,got to quote for a bathroom above a garage,has carpet at the moment,wants a price on underfloor heating and has just told me they want insulation as above garage,would the warm up boards be good enough for this?

[Dave]

200w systems are only for conservatory's and onto screed/concrete substrates...

They can be used as a primary heat source and not just ambient heat to warm the floor....i base this on Uheat's systems... hence why i asked if warm up do one and it states the same..

[timeless john]

Thermonet do a 200w watt system and it's sold as a primary heat source.
Although the additional thickness of the Marble will mean a slightly slower heat up, Marble has a better conduction rate than slate and so this should not be an issue.
For the size of the Marble slabs the worktop people are suggesting, that would only be approx 14 pieces and so the client will have to decide on a style choice!