Tile expansion gap - Tile Advice

[Deleted member 57709]

Hi guys,
I'm tiling a large floor area 30 square meters (rectangle shape room) using 600x600 porcelain floor tiles and leaving 3mm grout joints. I understand that I need to leave un-grouted expansion gaps around perimeter of the room and also understand that I need to leave un-grouted expansion gaps every so often in the floor area.
2 questions:
1/ How often or how many feet should you have an expansion joint or an un-grouted grout line?
2/ Can I use silicone sealant for these expansion joints between the tile which would have been for grout? So in other words rather than using grout which doesn't allow for expansion to use silicone instead which will allow for expansion?
Thanks in advance,
Gary.

 

[Dave]

On 30 mtrs. You should be fine without a joint in the tiling field. ( unless one is in the screed etc ) As for perimeter, is the skirting off or on ?

 

[Deleted member 57709]

Sorry it's 40 sq meters not 30 my mistake typo error. Floor is approx 11m x 3.7m and yes skirting is off so I'm leaving a 8mm gap all the way around the perimeter.

 

[Deleted member 57709]

Sorry it's 40 sq meters not 30 my mistake typo error. Floor is approx 11m x 3.7m and yes skirting is off so I'm leaving a 8mm gap all the way around the perimeter.

Crikey think my head is in a shed today as I forgot to say that I have installed Ditra Heat mat and electric underfloor heating all over the floor area so that's why I was asking about the movement joint requirements.
To confirm its 40 sq meters not 30 sq meters.

Thanks in advance,

Gary.

 

[Dave]

Ok. Then tile away, no expansion joints required within the tiles. Just perimeter 👍

 

[Deleted member 57709]

Ok. Then tile away, no expansion joints required within the tiles. Just perimeter 👍

Hi Dave could you confirm that I don't need any field movement joints even with electric underfloor heating in place under the tile?

Thanks for your help really appreciated.

Cheers,

Gary

 

[Dave]

Hi Dave could you confirm that I don't need any field movement joints even with electric underfloor heating in place under the tile?

Thanks for your help really appreciated.

Cheers,

Gary

Not on that floor with that matting. 👍

 

[Deleted member 57709]

Not on that floor with that matting. 👍

Thanks for the quick reply Dave you have been a massive help.
Really appreciate it matey,
Cheers,
Gary.

 

[Dave]

Thanks for the quick reply Dave you have been a massive help.
Really appreciate it matey,
Cheers,
Gary.

No probs, it’s a good system your using. Let us know how you get on. Maybe even share some pics, we love pics.

 

[Deleted member 57709]

Thanks for the quick reply Dave you have been a massive help.
Really appreciate it matey,
Cheers,
Gary.

Will do matey.