Fixing a WC onto floor w/ under floor heating

[WaterTight]

Looked at a gutted cloakroom to quote for installing toilet and basin.

At the time was just bare concrete floor. Soil pipe connection from previous toilet was roughly standard height (180 ish from floor).

I thought they were going to tile it.

Now he says they are having underfloor heating installed then vinyl on top.

Please excuse my total ignorance for the following questions. I've replaced loads of toilets but all have been either back onto existing solid or floorboard floor with occasionally allowing for a few mm here or there is changing the floor covering.

What I'm worried about is a) how to get a secure fixing when there are UFH pipes running underneath and b) whether i'm going to come back to find the soil pipe connection is now 50mm off the floor. Especially as it's a back to wall pan so harder to muck about with.

I don't want to sound like an idiot talking to customer so any info would be appreciated. The cloakroom is off the main hall so presumably if the finished floor surface was much different it would look weird. So maybe the existing floor will be chased out first?

Thanks

 

[ShaunCorbs]

is it elec underfloor or wet ?

as the elec doesnt take much 10mm at most, and normally would run the under floor round the toilet (50mm space round)

 

[rpm]

What I'm worried about is a) how to get a secure fixing when there are UFH pipes running underneath and b) whether i'm going to come back to find the soil pipe connection is now 50mm off the floor. Especially as it's a back to wall pan so harder to muck about with. Thanks

I`m finding more and more of this for back to the wall pans with UFH, often with no screws just No Nails holding the wood to the floor.

 

[JCplumb]

I'd just be telling them not to put underfloor heating under where the toilet will be sited, and that if you have to fix it down without being able to put fixings into the floor then they are going to have a wobbly bog at some point in the future.
The ball's in their court that way, if you end up having to comprimise - they have been fore warned. Also point it out in the invoice/reciept.

 

[mfgs]

When I do bathroom with electric underfloor heating. I just mark out the floor where the anything will be or need to be fixed and the electrician just lays it around that. Just ask them for pictures with a tape measure in the shot measuring off a fixed point like a wall, before the screed goes down, so you can be 100% sure you are safe to drill. You can then also draw out in pencil where the underfloor heating is.

 

[WaterTight]

Great suggestions, thanks guys.

 

[oz-plumber]

If you're not sure of the UFH location, unfortunately, you may have to resort to just siliconing the pan in place.
Not flash, but having to rip up tiles and do repairs, the customer will end up blaming you.
Probably end up taking the cost of the repairs off your bill.

Had a few discussions over the years regarding matters like this with builders and homeowners.
Won some lost some - but never end up pleasant.

 

[Howsie]

You could always buy a FLIR or the add on for your phone.