Can You Lay Turf Over Turf?

It is possible to lay new turf on top of old grass; however, this approach may not yield the best results. Therefore, we strongly advise against laying fresh turf over old turf. Doing so can lead to the deterioration of your lawn as the underlying grass dies. Below, we discuss several reasons why it is unadvisable to lay new turf on top of existing turf.

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The Roots Will Not Grow Well

Laying new turf over old grass reduces pore space between soil particles, resulting in soil compaction. New turf requires at least 12 cm of freshly prepared soil without barriers for optimal root growth. Therefore, resist the temptation to lay turf over existing grass, as it complicates the process of cultivating a healthy lawn.

It’s Not a Quick Fix for Weeds and Diseases

Persistent weeds must be eradicated before laying new turf, or they will likely push through the new grass. To cultivate a vibrant and lush turf free from weeds, proper soil preparation is essential. If your existing lawn suffers from weeds or diseases, placing fresh turf over it will only mask the underlying issues affecting your lawn’s health.

Humps and Hollow Spots Hamper Lawn Health

Good soil preparation is critical for establishing a fresh lawn. If you skip this important step and lay new turf on top of old turf, you may end up with uneven areas like humps and hollows. This can be particularly troublesome in autumn and winter, as standing surface water can lead to long-term damage. Proper drainage is vital for lawn health.

Laying Turf Preparation

George Davies Turf sources its fresh turf from the best suppliers in the UK. We are committed to delivering high-quality turf where you need it. It’s essential to lay your turf promptly, but ensure the soil is prepared adequately. Luckily, we have created a step-by-step guide to achieving the perfect lawn, which you can access here.

If a Job is Worth Doing, It’s Worth Doing Well

This saying holds true in lawn care. If you’re investing time and money into purchasing and laying fresh turf, make sure to prepare the soil correctly. The process is straightforward but can be time-consuming. Depending on your lawn's size, you may need to reserve your weekend or consult professional landscapers.

How to Lay Turf

If you need assistance with laying turf, our video titled "How to Lay Turf" provides all the necessary tips for achieving a beautiful lawn.

If you would like to learn more about George Davies Turf and our products sourced from the best turf farms in the country, please contact our friendly team today or send us a message, and we will get back to you as soon as possible.

How to Lay Turf on Existing Grass

While laying new turf over existing grass is possible, it's not advisable as it may lead to long-term issues. Here are some key considerations:

What to Consider When Laying New Turf Over Old Grass

1. Turf requires at least 50-100 mm of friable, good-quality topsoil for its roots. If laying new turf over existing soil, ensure to conduct a pH test to confirm soil quality and make necessary enhancements.
2. New turf laid over an existing lawn with weeds may allow those weeds to grow up through the new turf, leading to contamination.
3. Newly laid turf can develop shallow roots, making it vulnerable to drying out quickly during hot, dry weather.

What's Wrong With Your Existing Turf?

Identifying issues with your current lawn can help improve its condition. Here are some common problems:

Hydrophobic Soil

If your lawn has dry patches or shows signs of hydrophobicity, a wetting agent may be necessary before laying turf.

Hydrophobic lawns can cause water to pool on the surface, preventing moisture from penetrating into the soil. Dry patches may be localized rather than widespread. Wetting agents should be applied in cooler temperatures, ideally in the morning or late afternoon.

Compacted Soil

Soil compaction can occur due to heavy foot traffic from pets, children, or frequent use. Heavier clay soils are particularly prone to compaction, which restricts root growth and limits nutrient and water accessibility. Aeration methods such as using a garden fork, aerating sandals, or a tyne aerator can alleviate this issue.

Weeds

Properly mowing your lawn can help prevent weed invasions. If weeds persist, several removal methods can be implemented:

• Hand Removal
• Post-emergent Herbicide (Weed Killer)
• Pre-emergent Herbicide
• Organic Options

For further information, check out our Lawn Weed Removal Guide.

Pests

Common lawn pests include Army Worm, Sod Web Worm, and Cut Worm, all of which prefer lush, healthy turfgrass and are more prevalent from December to May.

Humps and Hollows

Top dressing can be used to address poor soil preparation or fill in low spots and level uneven areas. If your lawn is well fertilized and healthy, top dressing may not be necessary. However, it can provide several benefits, including reducing thatch accumulation, improving nutrient retention, and enhancing drainage.

Getting Proper Soil Preparation

1. Begin by spraying existing vegetation with Glyphosate, allowing a minimum of two days for the chemical to work. A second application may be necessary.
2. Remove any existing grass and weeds or incorporate them into the soil.

TIP:

• For optimal results, cultivate or till the area to a depth of approximately 150 mm, adding organic matter or soil amendments as indicated by your pH test results.

3. Add turf underlay (sandy loam) as needed to provide a suitable base for your new lawn, ensuring pH levels remain between 5.5 and 7.
4. Avoid drainage issues by ensuring soil slopes away from foundations and paths.
5. Rake and smooth the soil, removing any debris.
6. Roll the area with a lawn roller to firm the soil and identify low spots that require more underlay.
7. Maintain a grade 20-25 mm below sidewalks and driveways where the turf will be laid.
8. Screen the soil for a smooth surface, checking that when you walk on it, you leave only a slight footprint.
9. Lightly moisten the soil to minimize dust and provide a moist base for your turf.

Turf Installation onto Your Freshly Prepared Soil

1. Apply a pre-turfing fertilizer, such as Lawn Launcher, and rake it into the surface.
2. Install your instant turf immediately upon arrival.

TIPS:

• Before laying turf, ensure the soil is not too hot. Lightly wet it to cool it down.
• In hot weather, water each section as you lay it to prevent drying.

3. Begin laying turf from the furthest point, along the longest straight edge. Stagger the joints in a brickwork pattern, ensuring the edges are tightly butted against each other.
4. Use a sharp knife or shears to cut turf as needed.
5. After laying your turf, roll the entire area to improve contact between the turf and soil, removing air pockets.

Days 1-7:

• Water twice daily until runoff occurs. In extreme heat, a third watering may be necessary.

Days 7-14:

• IF TURF PULLS UP: Water twice daily while soaking your new lawn.
• IF TURF WON’T PULL UP: Water every morning.

After First Mow:

• Water every second day or as needed, preferably in the morning.

TIP:

• To judge when to water again, soak a tea towel, hang it on the line, and when it’s dry, your lawn is ready for another drink.

Remember that this guide is only a reference; consider your local climate and conditions when applying these recommendations.

It’s time to enjoy your new lawn! If you have questions about ongoing care, reach out to our friendly staff; they are eager to assist!

If you're interested in further details, please visit Residential Turf Grass.