Hundred year old lime mortar. If the load on a part of a wall made from such
mortar is removed, can the underlying section of wall heave upwards. So
later problems if load reapplied and spread over that section of wall and an
adjascent section that remained loaded.

If this effect exists, is it less likely to occur with modern mortar?


My appreciation of a local architect
http://www.diversed.fsnet.co.uk/hc.htm