Struck flush jointing is a masonry technique in which the joint is finished directly with the bedding mortar, without a separate pointing operation. While laying the bricks, the mortar that is squeezed out of the joints is immediately struck off flush, creating a smooth, sealed joint.
How does it work?
In struck flush jointing, the mortar that is pressed out from between the bricks is finished off with a trowel or jointer right after the brick is set. The joint and the masonry are made in a single operation, with no separate pointing mortar applied.
There are several variations:
- Struck flush — the joint is finished flat and smooth
- Recessed (raked) joint — the joint is finished slightly set back
- Bead joint — the joint is finished slightly proud for a decorative effect
Application
Struck flush jointing is widely used because it:
- Is faster — no second operation is needed
- Is cheaper — requires less labour and material
- Suits both internal and external walls — provided the mortar quality is adequate
Considerations
- Mortar quality — the mortar must be suitable for both laying and finishing the joint
- Weather conditions — in heavy rain, struck flush joints can wash out
- Aesthetics — for decorative work, separate pointing often gives a finer result
- Watertightness — a properly struck joint must be completely sealed
Related terms
Want to learn more about construction terms? Visit our knowledge base at fredsdiyplans.com.