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Installing artificial grass or fake grass can greatly enhance the look and enjoyment of your outdoor space. But the key to a successful artificial turf installation lies beneath the surface. The right sub-base provides essential support, drainage, and longevity for your synthetic grass. When planning an astroturf project, one of the biggest decisions is which type of sub-base to use. Here's an overview of the most common artificial grass sub-base options to consider:
Aggregate Sub-Base
An aggregate sub-base consists of crushed stones, rocks, or gravel. It offers an extremely stable foundation for artificial grass but requires heavy excavation to reach the needed depth. Aggregate is a great choice for large turf projects like sports fields where excellent drainage is needed. It may be overkill for a small residential lawn.
Compacted Aggregate
This is a layered mix of aggregate sub-base blended with smaller crushed stones. Compacting the layers creates firmness. Angular stones promote drainage. This is a flexible option working for backyards or play areas of any size. Excavation depth can be at least 4-6 inches shallow.
Asphalt Sub-Base
Asphalt provides a perfectly flat, solid surface under artificial grass. This is ideal if installing turf over an existing asphalt driveway or tennis court. New asphalt can also be poured and compacted. Like aggregate, this ensures great drainage. Asphalt does get extremely hot in sunny weather, so heat-resistant turf may be needed.
Concrete Sub-Base
Concrete offers the strongest and most permanent base for synthetic grass. This works well for turf around pool decks or patios that are already concrete. New poured concrete can be used too. The downside is that concrete is rigid and lacks drainage capacity. Unless integrated with drain lines, moisture can collect under turf leading to odor and mold.
Compacted Decomposed Granite
DG is an increasingly popular sub-base for artificial lawns. This crushed granite rock material compacts firmly while allowing drainage. DG needs only 2-3 inches for residential installations, avoiding extensive excavation. It spreads easily across yards and works on slopes. Decomposed granite provides a middling budget option combining stability, drainage, and ease of use.
The optimal sub-base depends on your unique needs - from space size, drainage, costs, and existing terrain. Consult with experienced artificial grass installers to determine which sub-base option truly creates the best foundation. With the right underlayment support, your synthetic turf can thrive for many years of vibrant beauty and family fun.
Here are three frequently asked questions (FAQs) :
1. FAQ 1: What are the most common types of sub-bases used for artificial grass installations?
Answer: The most common types of sub-bases for artificial grass installations include crushed stone, decomposed granite, and concrete. Each has its own advantages and suitability depending on factors like drainage needs, local climate, and intended use of the area.
2. FAQ 2: How do I determine which type of sub-base is best for my specific installation?
Answer: It's crucial to consider factors such as local climate conditions, the expected level of foot traffic, and drainage requirements. For example, crushed stone is excellent for drainage, while concrete provides a stable surface for heavy traffic areas. Consulting with a professional installer or contractor can also provide valuable insights tailored to your specific project.
3. FAQ 3: Can I use an existing natural grass lawn as a sub-base for my artificial grass installation?
Answer: In most cases, it's not recommended to use an existing natural grass lawn as a sub-base for artificial grass. Natural grass sub-bases tend to retain moisture and can lead to drainage issues over time. It's generally advised to remove the natural grass, prepare the ground properly, and then choose a suitable sub-base material for your artificial grass installation.
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