Hi guys, after some more advice. Im about to start tiling new ensuite with 450x300x10mm ceramics. What size trowel do you recomend, vast majority of tiles are going onto unscimmed plasterboard ( except where ive tanked ) while the rest will be going onto a small scimmed concrete block wall.
Also in the corners, what size expansion joint do i need to leave for silicone, was hoping to keep it at 2mm same as the grout lines. Thanks

I would go with an 8mm.

Yes I would also be using an 8 mm on those ..

And yes to the 2mm joints in the corners.

Thanks for the advice guys, will treat myself to a new one in the morning the one ive got is a 10mm tapered 5mm deep at 12.5mm centres. Thanks again

as above 8mm and make sure you use a good primer if you are using cement based addy !

A nice Raimondi 8mm square notch with gel handle would be my weapon of choice

8mm sounds right to me and 2mm silicone joint in the corners is fine

Have a read of the link below, might help you out a little.

BAL Trowels

yep, 8mm from me too with 2mm silicone joint