At what temp does brick mortar require an additive?
Our house should be all bricked by now, but we had a series of issues with the masons and, as a result, we've been without masons for many weeks now. We have quite a bit left that needs brick and, now that the temps are in the low 40's, I fear our mortar will need an additive. What temperature requires this? I'm hoping we don't need to use it since I hear it weakens the mortar, but we may have to. I also hope the new masons lay the brick well and we don't have one half our house looking like it was done with a new crew, though that's a whole other issue. thanks.