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 The image shows freshly mixed mortar with the right consistency ready for application.

Overview

Mixing mortar correctly is essential for strong and durable brickwork, paving, or repairs. Whether you're using a premixed mortar bag for small jobs or making your own from scratch, getting the right consistency is key. Follow this step-by-step guide to ensure your mortar is mixed properly and ready to use.

Tip: Always wear the appropriate safety equipment (safety glasses, gloves, ear muffs and a mask, for example) and always follow the instructions for the product or equipment.

Steps

1Choose the right mortar mix

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.

A variety of mortar mix, including cement, sand, lime, oxide color powders, and a bonding agent, are neatly arranged on a covered floor.

2 Mix the dry ingredients

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.
A person is mixing dry mortar mix ingredients in a wheelbarrow using a shovel

3Add water gradually

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.
A person is adding water slowly to the dry mix and mixing it with a shovel until the mortar reaches the right consistency.

4Check the consistency

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!

A person in a red shirt and black gloves is holding a trowel upside down with a small amount of mortar mix on it

5Now that you’ve mixed mortar…

Health & Safety

Asbestos, lead-based paints and copper chromium arsenic (CCA) treated timber are health hazards you need to look out for when renovating older homes. These substances can easily be disturbed when renovating and exposure to them can cause a range of life-threatening diseases and conditions including cancer. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page.

When following our advice in our D.I.Y. videos, make sure you use all equipment, including PPE, safely by following the manufacturer’s instructions. Check that the equipment is suitable for the task and that PPE fits properly. If you are unsure, hire an expert to do the job or talk to a Bunnings Team Member.