I have owned an old house is the south of England where we bought proper lime mortar to use with old "soft" bricks to reduce the damage caused by modern cements.
We have just moved to an old mas and some of the stonework seems to have suffered frost damage while the mortar in places looks like hard cement (and none of the mortar seems particularly soft). The house was renovated/extended from the original farm house in the 1970s as we understand it (by a wealthy "household name" family who did not appear to skimp on anything).
Do people use lime-putty based mortars at all in France? What should I try to get and from what sort of builders' merchants?
Many thanks. Alan