Raked Mortar Joints

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Raked mortar joints. Older brick and mortar walls commonly had raked joints which are flat mortar joints slightly recessed from the front edge of the brick. Effect the emphasis is laid on the horizontal aspect of the facade especially in combination with full vertical head joints or even no vertical head joints at all. The dry laid appearance can have nice shadow lines one way to install natural stone is to dry fit the pieces together and show no grout between the pieces. It has lower resistance to weathering than the other common joints so it is used when historical accuracy is important.

Many voids in the head joints were exposed when the mortar in this area was ground out so that the wall could be tuckpointed with a raked joint to match the rest of the house. Q i am working on a residence that has raked mortar joints. Mortar is recessed approximately 1 2 inch from the face of stone. Raking the mortar out can open up voids in the head and bed joints that increase water penetration.

Both are formed using a sharp angle to create a mortar slope in. For repointing purposes mortar joints should be raked out to a minimum depth equal to twice the height of the joint i e. 1 dry laid recessed or paper thin mortar joints. Modern masonry joints often bring the mortar flush with the.

Due to the fact that the mortar sits back from the face of the brick there is less cover between the face of the mortar joint and the top of the brick unit where the cores exist. Struck weathered joints. Raked joints are similar to flush joints but rather than aligning perfectly with the brick they sit back about 2mm. Because of a change in the design the first area was built with concave joints.

Instead the front portion of the mortar joint is scraped out. This gives the joint a depressed look and subsequently makes the bricks pop not recommended for external use. Double the gap between adjacent brick courses. The raked mortar joint is also a joint used mostly in historical restorations.

Mortar can be raked out or installed without pointing. Controlling dust throughout this process protects the operator other persons and assets in the vicinity and. This is an extra raked joint. In raked joints the mortar is not compact against the surfaces of the joint.

Think of the shape of this joint as being a flush joint that is raked back below the level of the surrounding masonry.