Tile gaps

[bill0305]

I am almost at a point where I am going to start tiling my new bathroom and I am considering what grout gap I should use.
Is there a recommended gap for size of floor tiles or is it just personal preference? I shall be using 430x430 porcelain tiles and I will be putting underfloor heating down onto the sealed/tanked plywood floor. The floor area is around 3m x 2.5m.
I am also incorporating a walk in wet-room type shower.

Thanks.

 

[Martino]

Normally i go for either a 3mm or 4mm gap, your preference , lay a few down dry with both size spacers in and see what you like the best...or ask the boss (missus) lol

 

[Billy Hunt]

3mm minimum pal BS and all that!

 

[Lincoln-tiler]

2mm minimum on the walls and 3mm minimum on the floor. Make sure you don't grout your internal corners. This must be siliconed. Good luck!