Help!! No grout spacers is that ok??

[Halfpint]

I originally asked for 1-2mm grout lines on these tiles.

Zurbaran Turquoise 11.2cm x 22.4cm Wall Tile

8 different texture patterns randomly packed. The partly handcrafted method of production causes shade variation and beautifully imperfect effects. Colour: Turquoise Material: Porcelain Finish: Gloss Size (cm): 11.2 cm x 22.4 cm Suitability: Wall Thickness: 8 mm N° of Tiles per Square Metre...

www.tiles-direct.com

Presuming you’d need to allow for thermal expansion and good watertight seal. But yesterday builder absolutely assured me (several times) that having no spacers would be fine and because of the natural bevel on the tile there would be enough space to grout. So we ploughed ahead. I’m just concerned that I may be dealing with shallow grout coming out and tiles failing.... what should I do? Am I worrying unnecessarily? He is finishing a small section today and grouting later today...

 

[Cris]

id say thats wrong..... grout wont stick very well to the glazed bevel. tiles need a gap to expose the side biscuit so grout can adhere to. tubbed adhesive on shower wall? no waterproof membrain?

 

[Cris]

plaster doesn't look like its been sealed either