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Artificial Grass Foam Underlay
At 10mm the Trulawn foam artificial grass underlay is intended for use on top of decking or patio to create a softer feel underneath the grass.
We recommend making sure the existing surface is in good condition before choosing your artificial turf underlay and fitting the grass on top.
For a thicker underlay for artificial grass make sure to check out our shock pad which is designed for use around play equipment.
Additional Information
Available in 2m width, price per sqm. 8sqm minimum order.
Foam Underlay FAQs
What is foam underlay for artificial grass?
Foam underlay is a thin cushioning layer fitted underneath artificial grass to make it feel softer and more comfortable underfoot. It is usually laid on hard surfaces such as patio, terraces or decking as it helps smooth out minor surface imperfections and adds a bit of extra protection between the grass backing and the base.
Where is foam underlay best used?
It’s best used for installations on top of decking, patios, balconies, terraces and other hard, flat areas where you want extra comfort beneath the grass.
Do I need foam underlay if I’m installing on soil?
Foam underlay is mainly designed for hard surfaces, so it isn’t necessary on soft, even surfaces. On surfaces such as soil, the priority is a properly prepared base (sub-base, compacted and level) rather than adding foam.
Does foam underlay replace base preparation?
No, foam underlay won’t fix an uneven, hard or damaged surface and isn’t a substitute for the materials that make up a traditional artificial lawn sub-base. Make sure the existing surface is stable, smooth and in good condition before fitting underlay and grass.
What’s the difference between foam underlay and a shock pad?
Foam underlay is a lighter comfort layer designed to make artificial grass feel softer on hard surfaces. A shock pad is typically thicker or denser and is used where extra impact absorption is needed such as schools and nurseries surrounding play equipment.
Will foam underlay affect drainage?
Foam underlay is designed for comfort, not to solve drainage issues so this depends on the surface. On surfaces such as decking and patios, water can only drain where the surface allows it so to ensure the underlay is not blocking any drainage channels or outlets. If drainage problems already exist, then foam underlay will not improve this in any way. It is best to make sure any wood underneath foam underlay has been treated for water resilience before laying.
How do I work out how much foam underlay I need?
Measure the area in metres (length x width) to get the square metre coverage, then order the same m² of underlay as your artificial grass area. Add a little extra if the space has lots of cuts, curves or obstacles to account for cutting in the underlay into those more hard to get areas.
