Hi,
I am doing a bottle cap floor and have come to the resin stage.
I have a room of 4.5m2 and have purchased 15kg of glasscast 3 to cover this.
The question is do i have enough? I have grouted around the caps but I am concerned about the grout not being at the level of the cap which may affect the level of resin. The floor is level and I have grouted as level with the caps as i can possibly get it. 
I have looked at the calculation for the penny floor for 6sqm and it says 12kg for a 2mm coating and figured i will need at least 15kg for a 2-3mm covering but I want to check before I start to mix and pour. Is there a calculation for a bottle cap floor with grout?

Kind regards

Neil