MORTAR JOINT BEDDING
Head joints in brick and block walls must be completely filled with mortar.
In Brick this is accomplished by fully buttering the ends of the brick before laying. In CMU the full width of each face shell should be mortared. Incomplete joints may appear full on the finished face of the wall,
but can allow water to penetrate. Proper mortar bedding is shown to the right for brick and block construction.
The tooling of mortar joints can have an impact on the weatherability of
masonry walls. There are many varieties of mortar joint tooling, but the only type of mortar joint that should be used in exterior walls is concave or vee.The concave and vee mortar joints, when done properly,
have the effect of compressing the mortar into the joint ensuring consistency and density. These joints promote water to shed off the joint without collecting.
To minimize cleaning, brush down the exterior during construction to
eliminate excess mortar adhesion.cleaning of masonry walls should be done 7 - 10 days after the walls are finished. Walls should be saturated with water first. Then using a chemical cleaner made for the job,
clean walls with a bucket and nylon brush and then rinsed again with water. Sandblasting wears away the surface of masonry and makes it much more absorbent. Power-washing can also do damage if done