Expansion joint - TilersForums.com

[chas]

Hi all i have expansion joints that are on the wrong side of door openings. Should i recut them or will 40mm makke a difference if i go over it. Its more of a issue as im using 1m×1m tile so not so handy to replace if they crack. Floor is also ufh.
Thanks charlie

 

[Deleted member 54066]

You need to follow the expansion from the subfloor up thru the tile. If you don't the tile WILL crack
Very often put in wrong place by the screeders (brainless idiots) and bad site management

 

[chas]

You need to follow the expansion from the subfloor up thru the tile. If you don't the tile WILL crack
Very often put in wrong place by the screeders (brainless idiots) and bad site management

The problem is it will look soooooooo wrong since they are large format should i not open up a expansion on the correct side of door frame instead?

 

[Deleted member 54066]

NO
Ufh pipes will be going through the screed and you will damage them!
It will look fine with a colour matched silicon as a cold joint. Should almost be invisible if done well.

 

[Deleted member 54066]

I take it you have layed this size tile before?
Ufh commissioned?
Uncoupling membrane being used?

 

[chas]

I take it you have layed this size tile before?
Ufh commissioned?
Uncoupling membrane being used?

Yeah all done.
Problem is aesthetically the client wont like the fact that i cannt run tile under door without a double cut. Got a 1.8m×0.9m wall tile to look forward to that has been asked to go brickbond i wonder how much of a bow will be on the tile ☹

 

[Deleted member 54066]

You'll need clips for them and a bloody straight wall
The floor tile will crack if you bridge the expansion. It really won't look bad with a colour matched silicon for the expansion joint.
Don't let the customer talk you into bridging the expansion, you will be back to change it and then you will have no choice but to do it right.
[automerge]1589540455[/automerge]
Would lay 1.8x.9 brick bond either. Probably say on the box max 1/4 bond, check.

 

[Ajax123]

When you say on the wrong side. Which side are they?
[automerge]1589555717[/automerge]

You need to follow the expansion from the subfloor up thru the tile. If you don't the tile WILL crack
Very often put in wrong place by the screeders (brainless idiots) and bad site management

Not necessarily brainless...2 things spring to mind. First at least there are joints in the screed and second the advice on joints in door thresholds says that the joint should go on the larger side so if you have a joint from a corridor into a room the joint will be placed on the room side of the threshold. The issue of course with that is that the tiles may want to extend to the corridor side of the threshold depending kn the placement of the the door itself. The screeder may well have got it right.

 

[chas]

When you say on the wrong side. Which side are they?

The expansion on a few doors is on the wrong side of the door frame but still within the door frame. So i was hoping a 40mm overhang shouldnt really effect tile as i also have anticrack matt installed aswell

 

[Deleted member 54066]

The expansion on a few doors is on the wrong side of the door frame but still within the door frame. So i was hoping a 40mm overhang shouldnt really effect tile as i also have anticrack matt installed aswell

Anti crack mat will be no good with horizontal movement only lateral movement. Bridging over the movement joint in the screed, which can and will have horizontal movement (if the two side of the joint have floors at different temperatures, as can happen for example) will crack the tiles running over them if fixed correctly.
I believe a good screeder in conjunction with the architect / designer should put the expansion joints in the floor under the doors, but what do i know I'm only a tiler, the person who ends up trying to may a floor look right, work correctly no matter what some muppet has done before me.