The best sub-base for your artificial grass

Ensure your synthetic grass is nice and even with the right sub-base

artificial grass

by Marina Avraam |

If you're tired of your grass changing from yellow to brown, only to spring up as a bright green when the weather is just right, then artificial grass might be just what you need. Synthetic grass is also great if you're looking to spruce up your outdoor patio, deck or garden, whilst keeping costs low.

However, as handy as artificial grass may be, the installation process is not as simple as you might think. Prior to rolling out the emerald green-ness that is your new lawn, it's important to ensure that you've created a stable, even and airtight base to increase the stability and durability of your grass - this is where sub-bases come in.

If you're planning on installing your grass on soil, then you'll need a layer of aggregates, otherwise known as a sub-base, for your synthetic grass to sit on top of. A sub-base is usually made of a type of stone, such as granite stone or limestone, which will provide your grass structural stability and can prevent sinkage in the case of footsteps or furniture being placed on top.

To help you figure out which sub-base is most suitable for your lawn, we've listed the best options on the market and answered a few commonly asked questions regarding fake grass installation and sub-bases.

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What is a sub-base?

A sub-base is a layer of materials used below your fake grass to ensure it is even and stable. Remember, a sub-base is only necessary for installing fake grass on soil - if you are installing your grass on a deck or concrete, then a sub-base is not required.

What is the best sub-base to use for artificial grass?

The two main sub-base materials include MOT Type 1 and/or granite or limestone chippings. For the best results, we recommend using a 50mm layer of MOT Type 1 and a 25mm layer of granite dust.

Sharp sand is also often recommended in replacement of granite dust, but keep in mind that this material can lead to drainage issues and is also prone to shifting underfoot.

Using a combination of MOT Type 1 and granite dust will help prevent drainage and levelling issues.

How do I install a sub-base?

First things first, you'll need to remove any existing turf from your garden. We recommend digging out around two inches of your soil and removing any stones and roots that might get in the way.

Next, after you've installed a weed membrane, it's time for the sub-base. Add a 50mm layer of MOT Type 1 and after the first layer is down, add up to 25mm of the granite dust. Then, make sure to even everything out using a rake or a screed.

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MOT Type 1

MOT Type 1 will serve as the first layer of your sub-base, and provides high strength and excellent load-bearing qualities.

Granite dust

A thin layer of granite dust will help prevent drainage issues and is especially recommended for houses with pets.

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Sharp sand

In some cases, sharp sand can be used instead of granite dust as an additional layer on top of MOT Type 1. We recommend a 15mm thickness and smooth compaction for the evenest results.

How to install artificial grass:

Marina Avraam is a Commercial Content Writer for What's The Best, and also writes for Grazia, Heat and Closer. She has a passion for psychology, reading and fashion writing.

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