You say the bath is going into an alcove? How deep is it? Is it possible to overboard or build out one side to make the bath a snug fit?
Your tile size is generally too large for tubbed adhesive. And you say you're running off a combination boiler so you'll have 1.5 bar pressure on both got and main supply (depending on what you set on the boiler but 1.5 is the normal mains pressure) so in my opinion although you may only use it once a week your shower will use a lot of water. Id say its a heavy wet area. You really should use a powder rather than ready mix in my opinion.
Your tile size is generally too large for tubbed adhesive. And you say you're running off a combination boiler so you'll have 1.5 bar pressure on both got and main supply (depending on what you set on the boiler but 1.5 is the normal mains pressure) so in my opinion although you may only use it once a week your shower will use a lot of water. Id say its a heavy wet area. You really should use a powder rather than ready mix in my opinion.
