Fixing toilet to tiled floor with underfloor heating

[Vicdiy]

I have to fix a new toilet to my daughter's downstairs toilet.She has just had the floor retiled. The house has piped underfloor heating. I am just a bit concerned about screwing the pan to the floor and whether the pipes will be far enough down not to worry. The previous wc was plugged and screwed down in the normal way.Any thoughts please.

 

[rpm]

Shouldn't be any pipes under the pan so check it first.

 

[Rob Foster]

Car body filler mixed right sticks unglazed porcelain to surfaces fine style been doin it for years, basins bogs u name it having read Simon below his solution is probably better

 

[SimonG]

Shouldn't but wouldn't trust somebody else.

Drilled to wall and silicone to floor.

 

[Vicdiy]

Shouldn't be any pipes under the pan so check it first.

How can I check it, the pipes are under a tiled floor so I can't see if there are any there or not?

 

[rpm]

How can I check it, the pipes are under a tiled floor so I can't see if there are any there or not?

Turn it on, does it become warm in the area. If in doubt then don`t use screws however if the pan fixings use`s L brackets with horizontal screws I`ve seen blocks of wood stuck to the floor to replace the brackets.

 

[Sharp Point]

2nd that, ct1 blocks of wood to thefloor and screw the side mounts into that

 

[AMGasServices]

Epoxy resin. Or change the toilet to a wall mounted toilet.

 

[Vicdiy]

Epoxy resin. Or change the toilet to a wall mounted toilet.

Not easy to take out again if I epoxy it. Toilet already bought and wall mounting not possible anyway.

 

[Ben-gee]

I agree with simong and bogrodder; screw cistern to wall and then run a nice bead of silicone around base of pan (use leveling packers first to ensure no rocking of the pan - cut them off flush with the porcelain). I've done this many times, can easily take out in future if needed but is rock solid for normal use. DO NOT consider screwing into floor.

 

[Harvest Fields]

I have to fix a new toilet to my daughter's downstairs toilet.She has just had the floor retiled. The house has piped underfloor heating. I am just a bit concerned about screwing the pan to the floor and whether the pipes will be far enough down not to worry. The previous wc was plugged and screwed down in the normal way.Any thoughts please.

If there is a toilet there already surely you should be fine? I personally wouldn’t be too worried if there was a toilet there already.

 

[Ben-gee]

I really wouldn't. The previous pan fix could easily have just been a lucky miss of the UFH. If you know it's there why would you risk it when other viable alternatives exist?

 

[Harvest Fields]

Not every engineer has thermal imagery to hand.

 

[Ben-gee]

You could switch on UFH and use your elbow, it's quite sensitive.... or is that for babies' baths?

 

[Vicdiy]

If there is a toilet there already surely you should be fine? I personally wouldn’t be too worried if there was a toilet there already.

A joiner has put some boxing behind where the previous toilet was so the new fixings would be about 200mm away from the previous so I think it would be taking a big risk to drill new holes.

 

[Ben-gee]

This is the last time I'll say it , DON'T drill floor. Nothing to gain, lots to lose.

 

[Harvest Fields]

This is the last time I'll say it , DON'T drill floor. Nothing to gain, lots to lose.

What the alternative? No toilet or get someone that has a thermal camera

 

[Ben-gee]

Mentioned earlier in thread by myself and others. Basically silicone pan or glue blocks in to screw to etc

 

[king of pipes]

Don't do it silicone it down to the floor and screw it back to the wall . Cheers kop

 

[Harvest Fields]

Don't do it silicone it down to the floor and screw it back to the wall . Cheers kop

Seems a bit DIY to me mate. I wouldn’t except that in my house. So wouldn’t do it in a clients.

 

[Harvest Fields]

I posted this on purpose to see people’s responses. I know exactly what I would do (I posted it 2 posts down from this one) but there is another post on here still ongoing at the moment that is very similar to this one and the engineer and customer are debating it. Non of the professional engineers that commented on the other post have mentioned any of the ideas here. Just wanted to see how people would react

 

[ShaunCorbs]

Old school it cement pan down ?

 

[Best]

I will admit on some toilet pans I have solely fixed them to floor using silicone.
I sometimes won’t drill floor when pipes could be below.
Yes, if the pan ever came loose, then I could be accused of incorrectly installing it.
But on large pans on top of clean flat tiles and cistern screwed to wall, they are often very stable without any floor fixing, so silicone added will be very strong. In fact it is very difficult to remove.
Toilet pans are a big footprint so would be hard to pull loose if siliconed.
A basin will glue solid to a tiled wall if silicone used, so same on floor, but perhaps silicone might not grab to some types of tiles.

 

[SimonG]

Every toilet I fit gets a silicone bead ran around the base.

Otherwise when us laddies miss it doesn't run under the pan edge and start stinking of pi$$

 

[Sharp Point]

You could switch on UFH and use your elbow, it's quite sensitive.. or is that for babies' baths?

That method is flawed, heat spreads.....