Synthetic Grass Installation in NZ: Complete Step‑by‑Step Guide
Synthetic grass has become one of the most popular landscaping solutions in New Zealand, offering a clean, green, low‑maintenance alternative to natural lawns. Whether you’re upgrading your backyard, creating a play area, or transforming a muddy, uneven space, synthetic turf provides a durable, long‑lasting surface that stays green all year.
This comprehensive guide walks you through every stage of installing synthetic grass, from preparing the ground to laying the turf and maintaining it long‑term. With the right approach, you can achieve a professional‑quality finish that looks great for years. Learn more about installation options here: unreallawns.co.nz/artificial-grass-installation
Why Synthetic Grass Is a Smart Choice
Synthetic grass is designed to withstand New Zealand’s harsh UV levels, heavy rainfall, and varied soil conditions. It offers several advantages:
- Stays green year‑round
- No mowing, watering, or fertilising
- Safe for kids and pets
- Ideal for shaded or high‑traffic areas
- Works on soil, concrete, decking, and rooftops
- Reduces mud, mess, and maintenance
- Long lifespan with minimal upkeep
Modern synthetic turf is engineered to look incredibly realistic, with multi‑tone fibres, soft textures, and strong backing systems that mimic natural grass.
Preparing the Area for Installation
A successful installation starts with proper preparation. This ensures your synthetic grass drains well, stays level, and lasts as long as possible.
1. Measure the Area
Accurate measurements help you calculate how much turf and base material you need. Measure the longest length and width, then add a small margin for trimming.
2. Clear the Surface
Remove all debris, including:
- Rocks
- Sticks
- Weeds
- Old edging
- Loose soil
A clean surface prevents bumps and unevenness later.
3. Remove Existing Grass
If natural grass is present, remove it to 100mm using a shovel or sod cutter. Removing the roots prevents regrowth under the turf.
4. Check Drainage
Good drainage is essential. If your area tends to hold water, consider:
- Slightly sloping the base
- Adding extra gravel
- Installing a French drain
- Improving soil permeability
For best practice, refer to New Zealand’s Ministry for the Environment guidance on water and drainage, which outlines how proper sub‑surface drainage supports long‑term outdoor performance: https://environment.govt.nz/
Choosing the Right Synthetic Grass
Not all synthetic grass is the same. The right choice depends on your space, usage, and preferences.
Colour
Choose a natural‑looking shade that suits your home. Multi‑tone fibres look the most realistic.
Pile Height
- 15–30mm: Best for high‑traffic areas
- 30–40mm: Ideal for residential lawns
- 40mm+: Luxurious look, softer feel
Material
- Polyethylene: Soft, realistic, UV‑resistant
- Nylon: Extremely durable and heat‑resistant
- Polypropylene: Budget‑friendly for low‑traffic areas
Blade Shape
C‑shaped, S‑shaped, and W‑shaped blades spring back better and resist flattening.
Backing & Drainage
Look for perforated backing that allows fast water flow. High‑quality turf drains up to hundreds of millimetres per hour.
UV Protection
NZ’s UV levels are among the highest in the world. UV‑stabilised turf prevents fading and brittleness.
If you need help choosing the right product, visit: unreallawns.co.nz
Tools and Materials You’ll Need
Before starting, gather:
- Utility knife
- Shovel
- Rake
- Compactor
- Geotextile cloth
- GAP20 base gravel
- GAP7 top layer
- Turf adhesive
- Joining tape
- Infill sand
- Gloves and safety glasses
Having everything ready makes the installation smoother and faster.
How to Install Synthetic Grass (Step‑by‑Step)
Follow these steps for a professional‑quality installation.
1. Excavate 100mm of Soil
Remove the top 100mm of soil to create space for the base layers. This ensures stability and proper drainage.
2. Install Timber Edging
Secure treated timber around the perimeter. This keeps the turf tight and prevents shifting over time.
3. Lay Geotextile Cloth
Place geotextile fabric over the soil to prevent weeds and improve drainage.
4. Add GAP20 Base Layer
Spread GAP20 gravel evenly and compact it firmly. This forms the structural foundation of your synthetic lawn.
5. Add GAP7 Top Layer
Apply GAP7 to create a smooth, even surface. This layer ensures the turf sits flat and looks natural.
6. Compact the Surface
Compact again to remove air pockets and ensure long‑term stability.
7. Check for Level
Fix any dips or bumps. A smooth base is essential for a clean finish.
8. Lay the Synthetic Grass
Roll out the turf, ensuring the grain runs in the same direction across the entire area.
9. Trim the Edges
Use a sharp utility knife to cut the turf neatly along the timber edging.
10. Join the Seams
Use joining tape and adhesive to bond seams securely. Proper seam work ensures the lawn looks seamless.
11. Secure the Perimeter
Staple or nail the turf into the timber edging to keep it firmly in place.
12. Brush the Turf
Brush the fibres upright using a stiff broom or power brush. This helps the turf settle and look natural.
13. Apply Infill Sand
Spread silica sand evenly to:
- Add weight
- Support the blades
- Improve drainage
- Keep the turf cool
This completes your installation.
How to Use Zeolite During Installation
Zeolite is most effective when used as an infill, especially for homes with dogs. Because we import high‑quality zeolite specifically for synthetic grass, it’s an excellent upgrade for long‑term odour control and hygiene.
Zeolite as an Infill (Recommended Method)
After brushing the turf upright, apply zeolite as part of your infill mix. It replaces the silica sand and provides continuous odour‑absorbing performance. Zeolite’s natural honeycomb structure traps and neutralises ammonia, helping keep pet areas fresher for longer.
Best for Pet Areas
If your installation area is used regularly by dogs, zeolite is one of the most effective infill upgrades you can include. It reduces odours, improves hygiene, and minimises the need for frequent rinsing.
Maintaining Synthetic Grass
Synthetic grass is low‑maintenance, but a little care keeps it looking great.
Brush the Grass
Brush twice a year (more often for pets or heavy use) to keep the blades upright.
Remove Debris
Use a leaf blower or broom to clear leaves and dirt.
Rinse Occasionally
Hose the turf monthly to remove dust and pollen.
Pet Care
For dog owners:
- Remove solids daily
- Rinse urine areas
- Use pet‑safe deodoriser if needed
Learn more about turf for pets here: unreallawns.co.nz/artificial-grass-for-dogs
Stain Removal
Use warm water and mild detergent for spills or marks.
Installation Costs in NZ
Typical installation costs range from $65 to $200+ per m², depending on:
- Turf quality
- Pile height
- Site access
- Drainage requirements
- Ground preparation
- Project size
DIY installation saves money, but professional installation ensures perfect drainage, seam strength, and long‑term durability. Explore installation options: unreallawns.co.nz/artificial-grass-installation
Heat Management for Synthetic Grass
While synthetic grass stays green year‑round, it can warm up in direct sunlight — especially during the peak of summer. The good news is that modern turf technology has significantly improved heat performance, making synthetic lawns far more comfortable than older generations of artificial grass.
Cooling Yarn Technology
Many premium synthetic grass products now include cooling yarn technology, which is engineered to reflect more sunlight and absorb less heat. Several of the turf options we supply use this advanced fibre design, helping the surface stay noticeably cooler underfoot compared to standard synthetic grass.
Cooling yarn works by:
- Reducing heat absorption in the blades
- Reflecting more infrared light
- Keeping the surface temperature lower on hot days
- Improving comfort for kids, pets, and outdoor use
If heat is a concern for your space, choosing a turf with cooling yarn fibres is one of the most effective solutions.
Light‑Coloured Infill
Infill plays a major role in heat management. Light‑coloured silica sand reflects more sunlight than darker infills, helping to keep the turf cooler. It also supports the blades, improves drainage, and adds weight to keep the lawn stable.
Shade and Placement
Strategic shade can also help reduce heat. Consider:
- Shade sails
- Umbrellas
- Trees or shrubs
- Pergolas
Even partial shade can significantly reduce surface temperature during the hottest hours of the day.
Quick Cooling Methods
If your lawn does warm up, a quick hose‑down can reduce the temperature instantly. Synthetic grass drains quickly, so the surface dries fast while remaining cooler.
Best Turf Choices for Hot Areas
If your installation area receives full sun throughout the day, the best heat‑management combination is:
- Synthetic grass with cooling yarn technology
- Light‑coloured infill Zeolite is a good option
- Good airflow and optional shade
This setup provides the most comfortable surface for summer conditions. Check our product selection for cooling yarn technology
Frequently Asked Questions
How long does synthetic grass last?
Most high‑quality turf lasts 15–20 years with proper care.
Does synthetic grass drain well?
Yes — especially when installed with GAP20, GAP7, and perforated backing.
Is synthetic grass safe for pets and kids?
Absolutely. It’s non‑toxic, soft, and mud‑free.
Can synthetic grass be installed on concrete?
Yes — it can be glued directly onto concrete, decking, or pavers.
Does synthetic grass get hot?
Synthetic grass can warm up in direct sunlight, especially during the peak of summer. However, many modern products — including several options we supply — use cooling yarn technology designed to reflect more heat and stay noticeably cooler underfoot. Choosing a turf with cool yarn fibres, along with using light‑coloured infill, can significantly reduce heat absorption and make the surface more comfortable for kids, pets, and everyday use.
What is zeolite and why is it used in synthetic grass?
Zeolite is a natural volcanic mineral that absorbs and neutralises ammonia — the main cause of pet urine odour. Because we import high‑quality zeolite specifically for synthetic grass, it’s an excellent infill option for homes with dogs. When applied as an infill, zeolite traps odours before they develop, improves hygiene, and helps keep the lawn fresher for longer.
Final Thoughts
Synthetic grass is a long‑term investment that transforms outdoor spaces into clean, low‑maintenance, year‑round green areas. With the right preparation and installation, your lawn will stay beautiful for years.
If you’d like expert help or a free quote, visit: unreallawns.co.nz/contact-us
