Do you have a dull, bare concrete space that could use a facelift? Whether it’s a tired patio, balcony, or courtyard, laying synthetic grass over concrete is a simple yet powerful way to transform hard surfaces into lush, green, low-maintenance areas.
In Australia, especially in cities like Hobart where space is at a premium and weather varies, more homeowners and renovators are choosing artificial turf to bring colour and function back to concrete areas. This guide will walk you through how to install synthetic grass on concrete, with clear, step-by-step instructions, expert tips, and answers to common questions.
Can You Lay Artificial Grass on Concrete?
Yes! Laying artificial grass on concrete is entirely possible and often a smart, cost-effective solution for a variety of outdoor spaces. It’s particularly popular for areas like balconies, rooftop terraces, pool surrounds, internal courtyards, paved backyards, and even commercial or childcare settings. If your concrete surface previously had tiles installed, cleaning tile glue from concrete is a crucial step before installation as leftover adhesive can interfere with proper drainage and turf adhesion.
However, there are some important conditions to consider before proceeding. Synthetic grass installs best on concrete that is clean, level, and in good condition. If the surface allows for adequate drainage or if drainage solutions can be added, and you’re seeking a fast, low-maintenance alternative to traditional grass, concrete is a great foundation.
On the other hand, it’s not ideal if the concrete is cracked, crumbling, or significantly sloped. In such cases, damaged slabs may need to be replaced, or the entire concrete removal may be necessary to ensure the base is safe, stable, and ready for resurfacing or alternative landscaping. Poor drainage can also pose issues, leading to water pooling beneath the turf. Additionally, painted or sealed concrete can prevent proper adhesion, unless it is prepared correctly by roughening the surface or removing the coating.
Pros and Cons of Installing Synthetic Grass on Concrete
While laying artificial turf over concrete offers an easy way to revitalise outdoor spaces, it’s important to weigh both the advantages and potential drawbacks. Here’s a quick look at what to expect before you begin your project.
Pros:
- No digging required: Ideal for hard surfaces
- Instant greenery: Quick visual improvement
- Low maintenance: No watering, mowing, or fertilising
- Child and pet-friendly: Soft underfoot and easy to clean
- Durable: Great for high-traffic areas
Cons:
- Drainage needs to be addressed
- Turf can get hot in summer
- Requires thorough surface prep
- Comfort may be compromised without an underlay
Tools & Materials You’ll Need
Before you begin installation, make sure you have all the right tools and materials on hand. Having everything prepared in advance will make the process smoother, faster, and more professional-looking.
Tools:
- Utility knife or turf cutter
- Measuring tape
- Power drill with masonry bit (10mm recommended)
- Broom or power brush
- Notched trowel (for adhesive)
- Caulking gun (for joint adhesive)
Materials:
- Synthetic turf (pre-cut or roll)
- Outdoor carpet adhesive or turf adhesive
- Double-sided adhesive tape (optional alternative to glue)
- Joining tape for seams
- Underlay (foam shock pad or drainage mat – optional but recommended)
- Silica sand or infill (optional, improves blade support)
Step-by-Step: How to Install Synthetic Grass on Concrete
Installing synthetic grass on concrete is a straightforward process if you follow each step carefully. Below is a complete breakdown to help you get it right the first time.
1. Clean and Inspect the Surface
Before anything else, you’ll need to make sure the concrete is clean, smooth, and ready to hold turf and adhesive.
- Clear away loose debris, dirt, moss, or existing grass
- Remove any furniture or obstacles
- Use a broom, blower, or pressure washer to clean the surface thoroughly
- Let the concrete dry completely
- Check for issues:
- Cracks – Fill with concrete filler
- Uneven areas – Grind down or level
- Paint or sealants – Roughen or strip for better glue adhesion
2. Improve Drainage (If Needed)
Drainage is crucial for preventing water buildup under your turf, especially in shaded or pet areas.
Common drainage solutions:
- Drill holes: Use a 10mm masonry bit to drill every 30–50 cm to allow water to escape
- Install drainage mat: Plastic drainage cells promote airflow and help water flow beneath the turf
- Elevated turf grid system: Perfect for balconies or rooftops with flat, sealed concrete
3. Lay an Underlay (Optional but Recommended)
Underlay adds comfort, insulation, and extra drainage. While not essential, it’s highly recommended for long-term performance and user comfort.
Benefits of underlay:
- Softens the surface underfoot
- Improves water flow
- Reduces heat transfer from hot concrete
- Ideal for children or sports areas
Types of underlay:
- Shock pad foam: Soft and safe, ideal for families
- Drainage underlay: Promotes water movement and air circulation
4. Cut and Lay the Synthetic Turf
Once your underlay is in place (if used), it’s time to fit your turf.
- Unroll the turf and let it sit for 2–4 hours so it can flatten and acclimate
- Align all pieces with the grass blades facing the same direction
- Use a utility knife to trim the turf to fit your area neatly
- Leave a slight overlap for trimming at the edges
- If using more than one roll:
- Ensure all blades face the same way
- Leave a 2–3mm gap between pieces for joining tape
5. Join Seams and Secure Edges
Now that your turf is positioned, it’s time to secure everything in place.
a. Seaming
- Lay joining tape underneath the seam gap
- Apply turf adhesive with a caulking gun
- Press turf edges into the adhesive, ensuring a tight, natural-looking join
- Avoid spilling glue onto the turf blades
b. Securing the Edges
- Use outdoor turf adhesive: Apply with a notched trowel around the perimeter
- Or use double-sided turf tape: Cleaner, easier to remove — great for temporary or rental applications
6. Brush and Apply Infill (Optional)
The final step improves appearance and durability. Infill gives turf a natural feel and helps blades remain upright.
- Use a stiff broom or power brush to fluff up flattened blades
- Apply silica sand or another suitable turf infill
- Use approx. 5–10 kg per square metre
- Brush again thoroughly to spread infill evenly into the base of the turf
Do You Need Underlay for Synthetic Grass on Concrete?
While not always essential, using underlay beneath synthetic grass on concrete is highly recommended—especially for areas used by children or pets, or in climates with temperature extremes. It adds softness, improves drainage, reduces heat retention, and enhances the overall comfort and longevity of your turf installation.
Recommended Underlay Types
Foam shock pads (10–25mm thick) provide excellent cushioning and impact absorption, ideal for play areas or high-traffic zones. Drainage matting, made from plastic cells or mesh, helps water flow underneath the turf, preventing pooling and odour—especially useful in shaded or pet-prone spaces.
How to Improve Drainage
Without proper drainage, synthetic turf can trap water and lead to mould or pooling. Here are some suggested solutions you can:
Solutions:
- Drill drainage holes: Every 30–50cm using a 10mm masonry bit
- Install drainage cells or mats under turf
- Slight slope: If possible, ensure concrete slopes slightly for runoff
- Use permeable infill: Helps water pass through instead of sitting on top
Tip: Avoid laying turf over low or sunken areas that collect water.
Maintenance Tips After Installation
Synthetic turf is low maintenance, but a few simple steps will keep it looking great. Brush the grass regularly with a stiff broom to lift flattened blades, and rinse occasionally to wash away dust or dirt. Promptly remove debris like leaves and pet waste to maintain cleanliness and prevent damage.
To protect your turf long-term, apply UV spray in sunny areas to reduce fading. Avoid placing hot items like BBQs directly on the surface, and always lift heavy furniture instead of dragging it to prevent seam damage.
FAQs
Can I glue fake grass to concrete?
Yes, using outdoor-grade synthetic turf adhesive or double-sided turf tape. Make sure the surface is clean and dry.
What’s the best adhesive for turf?
Look for outdoor carpet adhesive, polyurethane turf glue, or hybrid bonding agents rated for concrete and moisture.
Does artificial grass get hot on concrete?
Yes — it can heat up in direct sunlight. Use underlay, light-coloured infill, or shade structures to manage heat.
Can I install turf on painted or sealed concrete?
It’s possible, but the surface may need to be roughened with a grinder to help the adhesive bond properly.
Do I need infill on concrete?
It’s optional, but recommended. Silica sand or rubber infill supports blade structure, adds weight, and improves appearance.
Final Thoughts
Installing synthetic grass on concrete is a practical, stylish, and low-maintenance solution for Aussie homes. With the right preparation — including underlay, drainage, and strong adhesive — you can enjoy a vibrant green space all year round.
While synthetic grass is a great option for many, the foundation matters most. At Hobart Concrete Contractors, we provide high-quality concrete services to help you prepare the perfect base for any surface finish.
