How to mix mortar

The type of mortar mix you need depends on the job at hand. For smaller projects, you can use premixed mortar bags. For larger projects, you’ll need to mix your own using sand, cement, hydrated lime, and water. A standard mortar mix generally consists of six parts sand, one part cement, and one part hydrated lime.

The colour of your mortar can also be adjusted based on the materials used. Standard grey mortar is made using regular brick sand and cement mix , while a lighter or cream-coloured mortar can be achieved by using white brick sand and off-white cement mix. If you're after a different look, you can also add oxides to change the colour completely.

You may also consider using mortar waterproofing additives to improve your mortar mix. A plasticiser helps make the mortar easier to work with, while a waterproofing additive helps prevent moisture absorption. Always follow the manufacturer’s instructions when adding these, as too much can weaken your mortar.

Start by adding the dry materials to a wheelbarrow. Use a measuring bucket or shovel to measure out six parts sand, one part cement, and one part lime. Use a shovel to thoroughly mix the dry ingredients together until the colour is consistent. This helps ensure that when water is added, the cement is evenly distributed throughout the mix.

Make a small well in the centre of the dry mix and slowly pour in water. Avoid adding too much at once, as this can make the mix too wet and difficult to work with. Use a shovel to fold the dry mix from the outside into the centre, combining it with the water. Continue adding small amounts of water while mixing until the mortar reaches the right consistency. It’s easier to add more water if needed than to try and fix a mix that is too wet, as this can throw off the correct ratios.

To test if the mortar mix is ready, pick up a small amount on a trowel and hold it upside down. If the mortar sticks without falling off, the consistency is correct. If it is too dry or crumbly, add a little more water and mix again. The goal is to achieve a smooth, workable paste that holds its shape when applied.

Too much water in the mix will weaken the mortar and make it difficult to work with, so it’s important to be patient and add water gradually. Take your time mixing to ensure a smooth and even texture. Only mix what you need, as mortar dries quickly, so working in small batches can help prevent waste.

With the right mix and consistency, your mortar will be strong, durable, and easy to apply. Now you're ready to tackle your next project!

Learn how to mix concrete.