Artificial Grass Buying Guide
What Is PU Backing & Why Does It Matter?
When you're choosing artificial grass, it's easy to focus on the parts you can see. The pile height, colour and how soft it feels underfoot are often the first things people compare.
The backing doesn't usually get the same attention.
Although it's hidden once the grass has been installed, the backing plays an important role in how the lawn performs over time. It helps hold the fibres in place, supports the structure of the grass and can influence factors such as drainage, durability and everyday performance.
One type of backing you may come across is polyurethane, more commonly known as PU. If you've been comparing different Artificial Grass products, you've probably seen it mentioned in product descriptions or specifications without much explanation of what it actually means.
This guide explains what PU backing is, how it compares with latex backing and why it's something worth considering before choosing an artificial lawn.
Fibre Support
Helps keep the stitched fibres securely in place.
Flexible Structure
Supports the construction of the grass while remaining flexible for installation.
Everyday Performance
Works alongside the fibres, drainage system and prepared base.
What Is PU Backing On Artificial Grass?
PU backing is a polyurethane layer applied to the underside of artificial grass to help secure the fibres and support the structure of the lawn. It's commonly used because of its strength and flexibility, although the overall performance of any artificial grass also depends on the quality of the product and how well it's installed.
What Is PU Backing & Why Does It Matter?
Before looking at the differences between PU and latex backing, it helps to understand what the backing actually does.
Once artificial grass has been installed, you'll never see the backing. Even so, it's one of the components that helps the lawn perform as expected for years to come.
What Does The Backing Do?
Artificial grass is made up of more than just the fibres that create the appearance of a natural lawn.
Those fibres are stitched into a backing layer, which helps keep them securely in place while supporting the overall structure of the grass. Without it, the fibres wouldn't remain evenly positioned and the lawn wouldn't have the strength needed for everyday use.
The backing also works alongside the drainage holes built into the artificial grass, allowing water to pass through the surface and into the prepared ground beneath.
If you'd like to understand more about how artificial grass is made, our guide to What Is Artificial Grass Made Of explains how each layer contributes to the finished product.
What Is Polyurethane?
Polyurethane, usually shortened to PU, is a synthetic material used in a wide range of everyday products because it's both durable and flexible.
Within artificial grass, PU is used as the backing layer that helps secure the stitched fibres after they're tufted into the primary backing. Once cured, it creates a strong bond that supports the construction of the grass while allowing it to remain flexible enough for installation.
You don't need to understand the manufacturing process to choose the right artificial grass, but knowing what PU backing does can make it easier to compare products with confidence.
Why Is PU Used In Artificial Grass?
Manufacturers choose backing materials for the job they need them to do.
PU backing is commonly selected because it provides a durable layer that supports the fibres while helping the grass cope with regular use and changing weather conditions.
That doesn't automatically make every PU backed artificial grass the right choice for every garden. The quality of the fibres, pile density, installation and ground preparation all contribute to how the finished lawn performs.
Looking at the backing as one part of the overall construction, rather than the only feature that matters, gives a much better picture of the product you're considering.
PU Backing Vs Latex Backing
If you've compared different artificial grass products, you've probably noticed that PU backing isn't the only option available.
Latex backing is also widely used across the industry, which naturally raises the question of whether one performs better than the other.
The answer isn't always straightforward.
Both materials are designed to secure the fibres and support the construction of the grass. Rather than thinking about one as universally better, it's more useful to understand how they differ and what those differences could mean in everyday use.
Feature
PU Backing
Latex Backing
Primary Purpose
Secures fibres and supports the structure of the grass
Secures fibres and supports the structure of the grass
Flexibility
Designed to remain flexible during installation
Designed to provide flexibility during installation
Moisture
Commonly chosen for its moisture-resistant properties
Performance varies depending on the product
Drainage
Works alongside the drainage system within the grass
Works alongside the drainage system within the grass
Everyday Use
Built to support regular use when combined with quality construction
Built to support regular use when combined with quality construction
It's important to remember that backing is only one part of the overall product.
Two artificial grass products with the same type of backing can perform very differently depending on the quality of the fibres, the density of the pile and how well the lawn has been manufactured and installed.
Moisture Resistance
One of the reasons PU backing is often highlighted is its resistance to moisture.
Because the backing itself doesn't readily absorb water, it's commonly used in artificial grass designed for gardens where reliable drainage is important. That said, drainage is influenced by more than the backing alone.
The drainage holes within the grass, together with a correctly prepared sub-base, play a significant role in how effectively water moves away from the surface.
Fibre Retention
The backing is responsible for helping keep the artificial grass fibres securely in place once they're stitched into the lawn.
Both PU and latex backings are designed to do this, but the quality of the manufacturing process is just as important as the material itself. A well made artificial grass with a carefully constructed backing is more likely to retain its appearance over time than a lower quality product, regardless of which backing it uses.
When comparing products, it's worth looking at the overall specification rather than focusing on the backing alone.
Everyday Performance
Artificial grass needs to cope with everything from changing weather to regular foot traffic.
The backing forms part of the structure that supports the lawn through everyday use, whether that's children playing in the garden, outdoor furniture being moved or pets using the space throughout the year.
As with any artificial grass, the way the lawn is installed and maintained will also influence how it performs over time.
Why Many People Choose PU Backing
While the backing isn't visible once the grass has been laid, it can still influence how the lawn performs throughout its lifespan.
For many buyers, PU backing is one of several features they consider alongside pile height, density and the overall quality of the artificial grass.
Built For Everyday Use
Artificial grass needs to cope with normal life.
Whether it's a family spending time in the garden, children playing outside or regular foot traffic between the house and patio, the lawn should continue looking neat with routine care.
PU backing is commonly used in artificial grass that's designed for everyday use because it provides a durable layer that supports the fibres and the overall construction of the lawn.
Performs Well Throughout The Seasons
An artificial lawn stays outside all year, so it's exposed to changing temperatures, rain and everyday weather conditions.
The backing helps support the grass through those seasonal changes while working alongside the drainage system built into the product.
It's worth remembering that no backing can compensate for poor installation. A well-prepared sub-base remains one of the biggest factors in how an artificial lawn performs during wet weather.
Supports Effective Drainage
Good drainage is about much more than the backing material.
Artificial grass is manufactured with drainage holes that allow water to pass through the surface, while the prepared ground beneath carries that water away.
PU backing works as part of that overall system rather than replacing it. If drainage is a priority, it's just as important to prepare the base correctly as it is to choose a suitable artificial grass.
Straightforward To Look After
Artificial grass doesn't require mowing, feeding or watering, regardless of the backing used.
Keeping the lawn free from leaves and debris, brushing the fibres occasionally and cleaning up spills when they happen will help maintain its appearance throughout the year.
Routine maintenance is usually enough to keep a quality artificial lawn looking its best.
Is PU Backing A Good Choice For Pet Owners?
Many homeowners looking for artificial grass have one question in mind.
Will it stand up to life with dogs?
The backing is only one part of the answer, but it can still play a role when choosing the right product.
Artificial grass designed for pets is generally built to cope with regular use while allowing liquids to drain through the lawn efficiently. Combined with suitable installation and routine cleaning, this helps create a surface that's practical for everyday life with pets.
If dogs regularly use your garden, it's also worth thinking about the overall construction of the artificial grass rather than focusing solely on the backing. Fibre quality, drainage performance and correct installation all contribute to how well the lawn performs.
If you're comparing options, our Pet Friendly Artificial Grass collection offers products designed with busy households and pets in mind.
Does PU Backing Affect Installation?
The backing can influence how artificial grass behaves during installation, but it doesn't change the steps needed to create a successful lawn.
Whether the grass uses PU or latex backing, the surface underneath still needs to be prepared properly.
That means creating a stable, level sub-base with suitable drainage before the grass is laid.
Taking shortcuts during preparation is far more likely to affect the finished result than the choice of backing material itself.
Allowing the grass to settle before fitting, making accurate joins and securing the edges correctly all contribute to a lawn that looks natural and performs well over time.
If you're planning to install artificial grass yourself, our How to Lay Artificial Grass guide explains each stage of the process in more detail.
Choosing Between PU & Latex Backing
By this stage, you've probably realised there isn't a simple answer to whether PU or latex backing is "better".
Both are used throughout the artificial grass industry and both are designed to hold the fibres securely while supporting the structure of the lawn.
The right choice depends on the product as a whole rather than the backing material in isolation.
If you're comparing different artificial grass options, it's worth looking at several factors together, including the quality of the fibres, pile density, drainage, intended use and how the grass will be installed. Focusing on one specification alone doesn't always give a complete picture.
For example, a family garden that's used every day has different priorities to a decorative front lawn that's mainly there for appearance. Likewise, households with pets may place greater importance on drainage and ease of cleaning than someone looking for a low-maintenance feature in a quieter part of the garden.
If you're unsure which artificial grass is right for your project, taking a little extra time to compare the overall construction and intended use of each product is usually more valuable than choosing based on the backing alone.
PU Backed Artificial Grass FAQs
What Is PU Backing On Artificial Grass?
PU backing is a polyurethane layer applied to the underside of artificial grass to help secure the fibres and support the structure of the lawn. Although it isn't visible once the grass has been installed, it plays an important role in the overall construction of the product.
Is PU Backing Better Than Latex Backing?
Neither backing is automatically the right choice for every situation.
Both PU and latex backings are widely used, and the overall quality of the artificial grass depends on factors such as the fibres, manufacturing process and installation, as well as the backing itself.
Does PU Backing Improve Drainage?
The backing forms part of the drainage system, but it isn't the only factor involved.
Drainage also depends on the design of the artificial grass, the drainage holes within the product and, most importantly, the preparation of the ground underneath. A well-prepared sub-base is essential for water to drain away effectively.
Is PU Backed Artificial Grass Suitable For Dogs?
Artificial grass with PU backing is commonly chosen for gardens used by pets, particularly when it's paired with good drainage and regular cleaning.
When choosing artificial grass for dogs, it's worth looking at the overall specification of the product rather than the backing alone.
Does PU Backing Make Artificial Grass Last Longer?
The backing contributes to the strength and construction of the lawn, but it isn't the only factor that affects lifespan.
The quality of the artificial grass, how well it's installed and the level of ongoing maintenance all play an important role in how long the lawn continues to perform well.
Understanding The Backing Helps You Make A Better Choice
The backing may not be the first thing you notice when comparing artificial grass, but it's an important part of how the product is made.
Understanding the difference between PU and latex backing gives you a better idea of how artificial grass is constructed and what to look for when comparing different products. Rather than focusing on one feature, it's worth considering the overall quality of the lawn, how your garden will be used and whether the product is suited to your requirements.
If you're still exploring your options, our How To Guides and FAQs provide more information about how artificial grass is constructed and installed.
Choosing artificial grass is a long-term decision, and understanding what's beneath the surface can help you make it with greater confidence.
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