UFH - Does this look right?

[brownjoe]

Hi All
recently had UFH installed in my house. Having a few problems as the system won't go above 22 degrees and at best feels luke warm. Standard porcelain tiles were fitted above the system in the pic.


Any ideas why this won't work properly?

Thanks

 

[Time's Ran Out]

It should have been covered during other works.
However it looks as the spacing is OK although unsupported on the edges.
I'am unable to see what insulation was done prior to laying the cables or where the floor sensor has been placed in the system.
On a normal insulated wooden floor when you switch on electric UFH it would register at about 18degrees before any power is used!
If you are only getting a 22 degree heat then I'd check the position of the sensor to see if it has not been pulled back through the conduit and away from the heat wires and thus not registering an accurate reading, however if it's only 22 then the system may not be receiving any power (ie a fault in the wiring).
Get the part 'p' qualified electrician back who connected it and check for resistance and continuity in the cables.
Still don't like the thought of people working over an unprotected mat - usually causes problems.

 

[brownjoe]

Thanks
I'm not sure there was an additional insulation - which is a worry. there was a hardboard floor put down - which is what the wire was laid on to.

 

[Gazzer]

Thanks
I'm not sure there was an additional insulation - which is a worry. there was a hardboard floor put down - which is what the wire was laid on to.

Hardboard ???? :yikes:

 

[Time's Ran Out]

Hardboard ???? :yikes:

Hardboard !!!!!!!!:yikes::yikes:

 

[brownjoe]

i'm not good with the icon thing - but i'm guessing you guys are saying that's not good?

 

[paul flight]

the programmer may be controlling this 22 degree setting , some new programmers pick up the ambient room temp and will hold the setting at what ever it has been set to . read the programmer instructions .it may be that you have to set it to work from therm probe only..

 

[Gall.B]

Is it hardboard indeed Joe?

Could do with more info & photos please of the prepared substrate & materials used.

Have you been in contact with the installers?

 

[White Room]

I would be sorting the hardboard floor before anything else, that is sure to cause failure when it's tiled..

 

[nybor62]

hardboard:yikes::yikes::yikes: omg

 

[nybor62]

I would be sorting the hardboard floor before anything else, that is sure to cause failure when it's tiled..

i thought it was tiled

 

[jay]

Wire spacing is a bit wide .surely its not fixed direct to hardboard

 

[White Room]

i thought it was tiled

Your right

 

[paul flight]

the pic looks like hardie backer then the wire the tiled.

 

[jay]

View attachment 37355

looks thicker than 6mm not many screws

guessing its chipboard

 

[Bubblecraft]

Hardboard!!! Just asking for problems. Very badly laid UFH too. No consistency with spacing & an unprotected over hang!

 

[paul flight]

its 12 mm hardie backer on top of chipboard flooring!!!!!!!!!!

 

[Time's Ran Out]

But why is the UFH only 22 degrees?

 

[Gazzer]

Thermostat probe could be in the wrong place and giving a low reading. From the look of the UFH I would treat the whole lot with caution, too much tape for my liking too !

 

[Time's Ran Out]

If the floor sensor (and I'am assuming their is one) is away from the cables then the floor would be very hot.
Of course the thermostat could be set at 22degrees for it to switch off at that temperature.

 

[Gazzer]

I tend to use a seperate thermometer to test the temp of the floor in various places and have seen the probe in some weird situations.....under the bath and under skirting. The floor will indeed be hot depending on the thermostat settings. We also do not knowthe wattage of the cable. I also agree that they look too far apart for my liking.

 

[brownjoe]

Thanks all. I'm sensing I've bought a turkey with this one on a number of levels
Some serious discussions to be had with my builder!

 

[Gall.B]

Very much so Joe the more info you can give the guys the better and photos please.

Any other questions ask away, did the builder do the Tiling?

 

[Uheat - Keith]

Agree with everyone above.

Spacing looks like what we would say for spacing on a ply floor base
At that spacing we would also say the system is only a Warm Floor (secondary heat) system, depending upon how well the dwelling is insulated & the heat loss figure for the area.
Also, you would not have had U/F heating under the units ( I hope ) so less output for your area, and you have some patio doors / lot of glass, so more heat loss there.

Warm regards, Keith

 

[jay]

Thanks all. I'm sensing I've bought a turkey with this one on a number of levels
Some serious discussions to be had with my builder!

Can you give us a bit more info if you don't mind