I wonder if someone can advise?
My house was built in 1963, and has very light-coloured cement mortar pointing around the brickwork - very light grey, almost white in a certain light.
I recently had a window opening bricked up. In an attempt to match the colour of the pointing, the builder added a small amount of lime to the mortar. This lightened it a fraction, but didn't have the desired effect - it's still a darker grey than the original. Adding lime didn't seem the best approach to me, at the time. I now need to brick up another, more conspicuous opening, and want to get it closer this time. Should I be suggesting (a) a greater amount of lime in the mix, (b) whiter sand or (c) whiter cement?
Regards Richard