Understanding Shock Pads: Do You Need One Beneath Your Turf?

When planning a synthetic turf installation, most of the conversation tends to focus on the turf product itself. Pile height, colour, fibre weight, backing type. What often gets less attention is what sits beneath the turf, and in particular, whether a shock pad underlay is part of the specification.

For some installations a shock pad is essentially non-negotiable. For others it adds cost without meaningful benefit. Understanding where you sit on that spectrum makes for a better purchasing decision and a surface that performs the way you actually need it to.

What Does a Shock Pad Actually Do?

A shock pad is a resilient foam or rubber underlay installed directly beneath the synthetic turf layer, above the compacted aggregate base. Its primary function is to absorb and dissipate the energy of impact, reducing the force transmitted to the body when a person lands, falls, or runs on the surface.

In technical terms, shock pads are measured by their HIC (Head Injury Criterion) performance and Gmax values, which are the impact attenuation standards used by sports governing bodies worldwide to protect players from injury. But beyond the engineering numbers, the practical effects of a shock pad are straightforward:

• Softer underfoot feel during walking, running, and standing
• Reduced joint stress during extended physical activity
• Better impact protection for falls, particularly relevant where children play
• Reduced noise transmission through the surface, which matters in multi-level buildings or facilities adjacent to neighbours
• Additional thermal insulation that slightly moderates surface temperature in warm conditions

Shock pads do not affect the appearance of the turf surface or how it drains. They add thickness to the installation profile, typically between 10mm and 40mm, and they add cost. Whether they are worth that cost depends entirely on what the surface will be used for.

Sports Applications: When a Shock Pad Is Required

In sports facility applications, shock pad specification is often not a choice. It is a requirement.

New Zealand sports governing bodies, aligned with international standards, specify minimum impact attenuation levels for competition and training surfaces. FIFA Quality Programme requirements, World Rugby’s performance standards, and Athletics NZ guidelines all include surface deceleration and energy restitution parameters that, on synthetic turf, typically require a shock pad to achieve.

Sports where shock pad installation is standard practice:

• Rugby and football: World Rugby and FIFA both specify Gmax and HIC requirements for certified pitches. Most certified synthetic pitches in New Zealand are installed with a shock pad.
• Hockey: Particularly on water-based and sand-dressed hockey surfaces, shock pads are standard for player protection during sliding and falling.
• Athletics and multi-sport facilities: Where surfaces need to meet a range of impact standards across disciplines, a shock pad is the most reliable way to achieve consistent compliance.
• School sports grounds: Many school facility upgrades specify shock pads to meet duty-of-care obligations for younger players whose developing bodies are more vulnerable to impact stress.

For sport-specific turf specifications and surface performance standards, see TigerTurf’s range of synthetic turf sports surfaces.

Residential Applications: When It Adds Value and When It Does Not

In residential settings, a shock pad is an optional upgrade rather than a code requirement. Whether it is worth including comes down to an honest assessment of how the space will be used.

Residential scenarios where a shock pad is recommended:

• Children’s play areas: Young children spend a lot of time at ground level. Falls from play equipment and general tumbling are part of normal play. A shock pad beneath a children’s turf zone meaningfully reduces impact forces and is worth the added cost, particularly for families with younger children.
• Home gym installations over concrete: Turf laid directly over a concrete slab creates a noticeably firmer surface underfoot than turf over an aggregate base. For training involving plyometrics, Olympic lifting, or simply long periods standing, a shock pad takes the edge off and reduces joint fatigue over time.
• Elderly or mobility-limited users: Where the turf surface will be regularly used by people with balance concerns or joint issues, a more cushioned surface provides a meaningful safety benefit.
• Noise-sensitive environments: Apartments or properties where the turf is above a living space or immediately adjacent to neighbours benefit from the sound-dampening effect of a shock pad beneath the surface.

Residential scenarios where a shock pad is not necessary:

• Decorative front lawns and kerb appeal installations with minimal foot traffic
• Courtyard or entertaining areas where the primary use is walking, seating, and light activity
• Balcony installations where weight loading and installation depth are constraints
• Low-use garden feature areas

For most standard residential backyard installations where the turf is being used as a lawn replacement with light to moderate foot traffic, a good aggregate base provides adequate performance without a shock pad.

If you are planning a home gym installation where a shock pad is likely to be relevant, our detailed guide on artificial grass for home gyms covers underlay specification alongside pile weight and drag resistance recommendations.

Shock Pad Thickness Options: What the Numbers Mean

Shock pads are available in a range of thicknesses, and the right choice depends on the performance target you are trying to hit.

Common thickness ranges and their applications:

• 10mm to 15mm: Entry-level residential cushioning. Provides a noticeable improvement over no underlay on hard substrates but does not meet sports performance standards. Suitable for general family use over concrete.
• 20mm to 25mm: The most common specification for residential sports areas and backyard play zones. Meaningfully improves impact protection and feel for a range of activities. Often specified for school play areas and informal sports zones.
• 30mm to 40mm: Sports facility specification. Achieves the Gmax and HIC values required by most sports governing body standards. Required for FIFA, World Rugby, and other certified competition surfaces.

Thicker shock pads add more to the overall installation depth. On sites where finished levels are tightly constrained, particularly in renovation projects or areas adjoining existing paving, this is worth factoring into the design from the outset.

Foam and rubber compositions also differ. Closed-cell foam pads maintain their compression performance more consistently over time. Rubber crumb pads offer excellent durability and are common in sports facility applications where longevity of the full system is prioritised.

Cost vs Benefit: How to Weigh the Decision

A shock pad adds to the total installed cost of a synthetic turf project. As a rough guide, expect shock pad supply and installation to add $15 to $35 per square metre to the total project cost depending on thickness and material specification.

Weighed against that cost:

• For sports facilities: The ability to certify the surface to governing body standards is often a contractual or funding requirement. The shock pad is not optional.
• For family play areas: The cost per square metre over a fifteen-year installation lifespan is modest. On a 30m2 children’s play zone, a mid-spec shock pad adds around $600 to $900 to the project total, spread over the life of the installation.
• For home gyms over concrete: The improvement in daily training comfort and long-term joint health is difficult to quantify but real. Most gym users who have trained on padded versus unpadded turf over concrete report a meaningful difference.
• For decorative or low-use areas: The benefit is minimal and the money is better directed at a higher-quality turf product.

For a full breakdown of what drives synthetic turf installation costs in New Zealand, read our guide on the cost of artificial turf installation in NZ.

Explore TigerTurf’s full range of artificial turf products and speak with your nearest installer about whether a shock pad is right for your project.