UFH mat in bathroom | on ElectriciansForums

Discuss UFH mat in bathroom in the UK Electrical Forum area at ElectriciansForums.net

SSE

-
Joined
Apr 20, 2010
Messages
410
Reaction score
45
Was at a job yesterday & whilst running cables for lighting in a side attic space I came across something I’ve not see before (not surprisingly). The couple had a new bathroom installed last year & by the looks of it whoever installed the underfloor heat mat, they never measured the UFH mat correctly for the size of the bathroom. So from what I can see what they’ve done is when they got to the last tiled part of floor they’ve drilled a hole in the floor & stuck the heat mat wire under the floor & run the heat wire free in the void for about 300mm into the attic space & then have fitted a thick length of ply to joists, ran the excess cable out on top of the ply & then fitted another bit of ply on top of this. Doesn’t seem safe to me, should I notify the customer? I’ve been reading heat mat cable in air is a no no.
 
Was at a job yesterday & whilst running cables for lighting in a side attic space I came across something I’ve not see before (not surprisingly). The couple had a new bathroom installed last year & by the looks of it whoever installed the underfloor heat mat, they never measured the UFH mat correctly for the size of the bathroom. So from what I can see what they’ve done is when they got to the last tiled part of floor they’ve drilled a hole in the floor & stuck the heat mat wire under the floor & run the heat wire free in the void for about 300mm into the attic space & then have fitted a thick length of ply to joists, ran the excess cable out on top of the ply & then fitted another bit of ply on top of this. Doesn’t seem safe to me, should I notify the customer? I’ve been reading heat mat cable in air is a no no.

Sorry should have said excess is probably a good 5-6 metres on top of ply in attic.
 
I bet the customer knows about it, as the fitters would have convinced them it’ll stop pipes from freezing in the attic.


If MI says it’s not to be run in free air, then it’s likely, sometime in the future, the wire will overheat and melt through…

Is it really toasty in the attic? Too hot to near it, I imagine.
 
I bet the customer knows about it, as the fitters would have convinced them it’ll stop pipes from freezing in the attic.


If MI says it’s not to be run in free air, then it’s likely, sometime in the future, the wire will overheat and melt through…

Is it really toasty in the attic? Too hot to near it, I imagine.

Was in a quick look this afternoon & asked them. They weren’t aware of it. Was actually 5 years ago it was done, I’ve picked them up wrong re it being 1 year ago. I wasn’t back in the attic space today but will inspect the wire that’s in free air when I’m there next time. It’s turned off for now. I did wonder why they’re not meant to be in free air, I assumed it was so nobody got burnt but didn’t realise that the cable would melt.
 
im just assuming that they are designed to be surrounded by material, and would heat to a certain amount, spreading the heat into the material...

In free air, the heat might be too much, as its not being absorbed....

I might be wrong.... but think of an old kettle. You have to use it with water covering the element.... without water, the element can burn out
 

Reply to UFH mat in bathroom in the UK Electrical Forum area at ElectriciansForums.net

News and Offers from Sponsors

  • Article
Join us at electronica 2024 in Munich! Since 1964, electronica has been the premier event for technology enthusiasts and industry professionals...
    • Like
Replies
0
Views
381
  • Sticky
  • Article
Good to know thanks, one can never have enough places to source parts from!
Replies
4
Views
959
  • Article
OFFICIAL SPONSORS These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then...
Replies
0
Views
1K

Similar threads

The instructions tell you to test the insulation and you already know from the result of the previous test that the L and N are not insulated from...
Replies
4
Views
534
davesparks
D
  • Article
Rather than covering the issue, find where the moisture is coming from and address from that end, is the outside ground level above the inside, is...
Replies
1
Views
243

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top