S
Sean SML Tiling
Tub adhesive is only required on small format tiles no larger than 300x300 as it used for thin bed only. Large format tiles recommend a thick bed adhesive especially on 600x300. As already stated tub adhesive using a 10mm trowel will get you roughly 3m per tub. The adhesive will take weeks to fully dry before grouting can be done. I guess as hes using tub adhesive the walls haven't been primed which is a no no with wall tiling especially onto plaster