Expansion joints in screed

[Joel DIY]

Hello fellow tilers forum community,
I have laid underfloor heating mats on top of insulation boards and poured screed over the top of the mats.
I forgot to add any expansion joints and am concerned about what to do.
Any advice will be appreciated before I move forward with tiling the floors.
Thanks
Joel

 

[bsc ceramics]

How big is the floor????🤔

 

[Joel DIY]

How big is the floor????🤔

Hi BSC, thanks for your reply.
I have two floors one is a small toilet 2m x 0.8m and the other is the bathroom 2.25m x 2.45m

 

[Dave]

Hi BSC, thanks for your reply.
I have two floors one is a small toilet 2m x 0.8m and the other is the bathroom 2.25m x 2.45m

Are the 2 areas separately heated zones

 

[bsc ceramics]

If they are conected then a soft expansion in the doorway if separate then you dont need to worry

 

[Joel DIY]

Are the 2 areas separately heated zones

Hi Dave,
They are separate rooms with there own mats running independently.

 

[Joel DIY]

If they are conected then a soft expansion in the doorway if separate then you dont need to worry

they are separate rooms not connected and running independently with their own mat and thermostat.
I will leave an expansion joint at the door way but am concerned about the screed has nowhere to move against the walls.

 

[bsc ceramics]

As long as its flexie screed you will be fine its a small floor.
Remember the rules for heating it up for the 1st time

 

[Joel DIY]

As long as its flexie screed you will be fine its a small floor.
Remember the rules for heating it up for the 1st time

Yes I will thanks. Turn it up slowly in increments after a couple of weeks?

 

[Dave]

Hi Dave,
They are separate rooms with there own mats running independently.

If they are zoned then you beed expansion joints in the doorways

 

[Joel DIY]

If they are zoned then you beed expansion joints in the doorways

Thanks Dave, that’s really helpful and good to know. I’ve been panicking a bit. I had such trouble with my builder and have been taking on the project for myself and doing a much better job, albeit a lot slower 😉