Using Angle Beads, Stop Beads & Control Joints
Here’s an explanation of the different types of beads and how to prepare them for microcement.
Because microcement needs a completely flat surface, it’s best not to use angle beads on corners. The microcement is very strong as well so there isn’t the same risk of it failing on the edges like plaster would.
If angle beads are already installed, then you will need to make sure they’re well glued and screwed in place and use a compatible filling compound or Microcement Base Coat to flush out the angle bead. If you use Microcement, you’ll need to leave it until its completely dry before priming & meshing the surface. We’d expect this to take around 24 hours.
Microcement is only 3-4mm finished, so often, installers will work up to a straight edge rather than using stop beads.
But in some cases you may want to use a stop bead to work up to. Dural offer a selection of 4mm stop beads. These will need to be well glued and screwed in place, then flushed out with a suitable filling compound, microcement base coat or epoxy and quartz sand.
If there are Control Joints (aka Expansion Joints) in the substrate, they must be carried through to the surface of the microcement. Dural have a selection of 4mm control joints in a number of different colours.
Again, these need to be well glued and screwed in place, then flushed out with a suitable filling compound, microcement base coat or epoxy and quartz sand.