Over a period of time, weathering causes the mortar between bricks to deteriorate.  As a result, holes begin to appear and allow moisture, cold and insects to penetrate the wall.  In addition, if not treated, the bricks around the deteriorated mortar will eventually begin to crumble.  Tuck-pointing is the removal of loose and damaged mortar, replacing it with new, carefully dyed mortar to produce the best possible colour match with the existing mortar.  We are fully experienced at using proper historical lime based mortar.