Do it yourself

First you need to determine how bad the damage is. If you have a gap of a half in. or more maybe thy should be re-laid,or the foundaation should be checked. If this is a retaining wall check drain holes.If not we'er going to need some tools. You'll need a hammer, aajoint chisel, abrick trowel,a tuck-point,a striking-iron, and a stiff brush. Wearing gloves and eye protection remove a half to three quarters of an in. of cracked old mortar minimum with hammer and chisel. Clean joint with brush and water. When using pre-mixed mortar dry mix hole bag as it tens to separate with time and never by it on sale. Mix half a bucket at a time so you can take your time and be as neat as possible. Try to match existing work. With half in. of mortar on brick-trowel hold on edge of brick and push small slices of mortar into joint.Justlike scrapping a plate.Pack it tight.Smooth with iron making sure of a good bond on top and bottom. When mud has set use brick-trowel to slice off eases and brush with dry brush. Clean tools, wash hands and drink cold carbonated beverage, you've earned it. Cheers. Mike PS new mortar can be made to math old by adding die.