Made from a hydrated lime and soft sand; proportions will vary from 1:4 to 1:6 depending on the sand and the type of bricks to be laid. Hydraulic lime may be used where resistance to weathering is required or there will be heavy loading on the wall. Lime mortars have good \workability"; good adhesion and the bed and cross-joints can absorb stress movement and so avoid problems caused by cracking that can result from the harder"