Laying mortar involves a process of applying and distributing the mortar onto a surface for bonding, typically between bricks, blocks, or other masonry units. Here is how to do it:
Preparing the Mortar Bed
Before laying mortar, prepare the substrate to be worked on. Ensure it is clean and free from loose debris.
Applying the Mortar
Step-by-Step Process:
- Keying In: Begin by applying a coat of mortar to the substrate using the flat side of your trowel. This is known as "keying in" the mortar and helps create a good mechanical bond. The goal is to press a thin layer firmly into the substrate.
- Adding More Mortar: Once the initial layer is in place, add more mortar on top.
- Combing: Use the notched edge of your trowel to comb straight lines into the mortar. Ensure that all lines go in the same direction. This combing distributes the mortar evenly and improves bonding.
- Combing in straight lines provides better mortar distribution.
Practical Insights:
- Trowel Technique: When using the trowel, aim for consistency in both the amount of mortar applied and the pressure used. This will lead to more uniform mortar joints.
- Consistency is Key: Mortar should have the consistency of thick peanut butter. If it is too runny, it won't hold the weight of the masonry. If it is too dry, it won't bond well.
- Work in Sections: It is best practice to apply the mortar in small sections at a time, so the mortar does not start to dry out before placing the bricks or blocks.
Common Mistakes
- Applying too much or too little mortar: In either situation it can lead to weak bonds.
- Allowing the mortar to dry out: Dried mortar will not form a proper bond, therefore, work in small sections.
- Uneven Combing: Inconsistent comb lines can result in poor distribution of the mortar, and ultimately cause a weaker bond.
By following these steps, you will be able to lay mortar effectively, ensuring strong and long-lasting masonry work.
