Help!: which trowel size

[charlie-d]

I have tackled ceramic tiling in a bathroom before around bath and sink, I used a 6mm square notched trowel. I am now going to tackle my old shower which I have ripped out I have re studded the wall and sheeted it with green board Gyproc and tanked it. I have 300x300mm ceramic tiles. I intend to use bagged Bal flex adhesive for these tiles within the shower area. I have read several posts relating to trowel size and I am a bit confused. The walls are flat and plumb.
Do I need a thin bed solid bed trowel, if so which size, v - shaped, square notch or U- shaped, 5mm, 6mm, 8mm, 10mm etc.
Any help would be appreciated

[david campbell]

i tend to use 6/8mm soild bed trowel on shower areas depending on the condition of the surface and size of tile!
6mm should be fine for yours

[Dave]

8 to 10 mm for me..

[charlie-d]

Thank you both for the fast replies. I found a trowel on the internet
it states its a thin bed solid bed trowel its a v-notch 9mm x 5mm I assume the 5mm is the depth. would this be to shallow which type/make would suggest.
Thanx

[garretridge]

8mm for me only use 6mm for splashbacks were small tiles are used!

[foxman]

8mm for me as well

[Diamond Pool Finishers]

6mm for me

[whitebeam]

Perhaps your the only one with flat walls gooner

[doug boardley]

Thank you both for the fast replies. I found a trowel on the internet
it states its a thin bed solid bed trowel its a v-notch 9mm x 5mm I assume the 5mm is the depth. would this be to shallow which type/make would suggest.
Thanx

the 5mm might be the distance or gape between the points and 9mm the actual depth