What do you lot think ?

[widler]

On a job at moment ,I've started tiling the bathroom walls.
Downstairs and upstairs Floor is anhydrite ,60mm ish,and been down a month,wet UFH is not on yet,that's all floors downstairs tiled and bathroom upstairs
I told them UFH has to be turned on to help dry and turned off then tiled,it's being tiled with 800x450 porcelain tiles.
Problem is,plumber on job has said underfloor heating does not have to be turned on,it can be tiled after 2 weeks of being laid and you just have to stick matting down and away you go,EVERY tiler he knows does it like this.
Now is he right,and me wrong,please put your thoughts down nicely as I will show the owner and plumber this thread wether I'm right or wrong
Cheers
Craig

 

[Spud]

The plumber is wrong and has no experience of anhydrite screed by the sounds of it ,I would get the customer to ring schluter as regarding installing ditra over an uncommisoned wet anhydrite screed which has not even been moisture tested I am sure they will tell you it is not advisable

 

[AliGage]

With a normal screed you can ditra and tile as soon as its dry enough to tread on without leaving any foot print.
I don't have any experience with anhydrite screeds i'm afraid but read up here and elsewhere about them and can be vety confident that the same rules do not apply.

 

[cam_low]

with regards to a normal (s&c) screed Ali, Alan Jackson told me when it contains UFH, the floor needs to dry for 28 days, then be commissioned to BS which can take three weeks.

I know a bit off topic, but is this as you know it too ?

 

[Ajax123]

http://gypsol.co.uk/7_Floor_Finishes_Flowchart.pdf

thos might help

 

[Ajax123]

With a normal screed you can ditra and tile as soon as its dry enough to tread on without leaving any foot print.
I don't have any experience with anhydrite screeds i'm afraid but read up here and elsewhere about them and can be vety confident that the same rules do not apply.

Ditra does not replace the need for commissioning the UFH though.

 

[widler]

Cheers chaps, i did advise the owner all of the above, and to be fair he has heard me and is going by my recommendation, BUT its the 1st time ive seen the plumber today, and i can tell he is going to cause problems ,but i will point him to alans link, cheers

 

[m3fitter]

On a job at moment ,I've started tiling the bathroom walls.
Downstairs and upstairs Floor is anhydrite ,60mm ish,and been down a month,wet UFH is not on yet,that's all floors downstairs tiled and bathroom upstairs
I told them UFH has to be turned on to help dry and turned off then tiled,it's being tiled with 800x450 porcelain tiles.
Problem is,plumber on job has said underfloor heating does not have to be turned on,it can be tiled after 2 weeks of being laid and you just have to stick matting down and away you go,EVERY tiler he knows does it like this.
Now is he right,and me wrong,please put your thoughts down nicely as I will show the owner and plumber this thread wether I'm right or wrong
Cheers
Craig

That's why he's a plumber, not a tiler ;-) I hope you told him how to do his job ;-)

 

[TJ Smiler]

Cheers chaps, i did advise the owner all of the above, and to be fair he has heard me and is going by my recommendation, BUT its the 1st time ive seen the plumber today, and i can tell he is going to cause problems ,but i will point him to alans link, cheers

Use his head as your new speed ball Craig :11:


Ps: Met Herald 'Bomber' Graham on Saturday night mate, what a good fighter that was......Was chatting to him for about 45 minutes before the fight. Right nice bloke and still in top shape.

 

[Andy Allen]

Plumbers.......enough said !!

 

[TJ Smiler]

Plumbers.......enough said !!

Yeah but they always know best mate as there's is a proper trade and ours is just DIY

 

[widler]

Use his head as your new speed ball Craig :11:


Ps: Met Herald 'Bomber' Graham on Saturday night mate, what a good fighter that was......Was chatting to him for about 45 minutes before the fight. Right nice bloke and still in top shape.

Top bloke was bomber,i was and still am gutted when jackson sparked him.

My daughter met joshua on sat night along with a few others, Mitchell, degale and mcdonnel, ive fell out with her
Cracking right hand by froch as well

 

[chris.tiling]

Do not tile the floor until the heating has been fully commissioned. I have had an issue recently with an alpha hemi hydrate screed (slightly different but pretty much the same principles). It was 45 mm thick and had been down for 50 odd days from July to Sept last year. UFH was never commissioned and I queried this on the day we started tiling, to be told that it was fine just get on with it. It was fine ... until late November when they commissioned the ufh and 100 m sq of 1m x 1m tiles went pop cos the floor was still wet.

Do everything Alan (Ajax) says. What he doesn't know about screeds isn't worth knowing not some plumber who knows a bit about tiling.

 

[White Room]

Do not tile the floor until the heating has been fully commissioned. I have had an issue recently with an alpha hemi hydrate screed (slightly different but pretty much the same principles). It was 45 mm thick and had been down for 50 odd days from July to Sept last year. UFH was never commissioned and I queried this on the day we started tiling, to be told that it was fine just get on with it. It was fine ... until late November when they commissioned the ufh and 100 m sq of 1m x 1m tiles went pop cos the floor was still wet.

Do everything Alan (Ajax) says. What he doesn't know about screeds isn't worth knowing not some plumber who knows a bit about tiling.

Who had pay for that to be put right [MENTION=5038]chris.tiling[/MENTION]

 

[Stef]

Just reading up on this, has the laitance even been removed from the top of this anhydrite screed yet?
I love it when these plumbers tell us how to do our job.
I feel I'm pretty clued up about calcium sulphate screeds now & it's all thanks to one man Alan (Ajax) Jackson..