|
It could have been the temps, or also the moisture content of the two different mortars when they were applied, as well as the relative humidity on the different days.
What will fix it? Time. I'm sure the client won't want to hear that, but if he gives it 6-12 months, the two colors will match. That's what my mason told me when I freaked about the color matching of mortar done on different days on some work he was doing for me, and he was right.
|