If you’re looking for a reliable solution to address drainage issues behind your retaining wall, gravel is an excellent option to consider. This versatile material enables proper drainage by allowing water to flow away from the wall and prevent deterioration or soil erosion. However, before buying any gravel product, there are several critical factors to consider.
Firstly, you must determine the appropriate size and type of gravel that suits your drainage needs. The size of your gravel should not be too big that it would block the flow of water, nor too small that it would clog the outlet. Moreover, you must select the right type of gravel that complements and supports the soil structure behind your retaining wall. Additionally, the quality of the gravel must be taken into account to ensure that it lasts for long-term usage.
So, how do you choose the perfect gravel for your drainage project? Here are some questions to ask yourself to make an informed decision. What is the required depth of the gravel layer behind your retaining wall? Are there any specific regulations or restrictions to adhere to when choosing gravel products in your area? What is your budget for this project? Get answers to these questions to help find the best gravel for drainage behind your retaining wall.
10 Best Gravel For Drainage Behind Retaining Wall
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It is ideal for use as a durable landscape fabric that provides UV protection and has high tensile strength.
It is ideal for stabilizing ground and preventing erosion, particularly in locations with heavy foot or vehicle traffic.
Ideal for providing stability and support for gravel or grass areas, preventing erosion and improving drainage.
The product is ideal for preventing water buildup and erosion behind retaining walls.
Ideal for landscaping, erosion control, French drains, underlayment, and construction projects.
The product is ideal for creating a decorative and weather-resistant pathway in outdoor spaces such as gardens, patios, and beaches.
Ideal for draining water from driveways, patios, and other outdoor areas to prevent flooding and damage.
The product is ideal for installing a durable and effective drainage system in outdoor spaces.
The product is ideal for defining and separating lawn and landscape areas from gravel, mulch, or other surfaces.
The product is ideal for draining excess water from large paved areas such as driveways, patios, and commercial properties.
1. Geotex Landscape Fabric: Durable, American-Made & Dot Approved
This Sandbaggy Fabric is proudly made in America, supporting American jobs, infrastructure, and families. It is one of the only companies that still makes its fabric in the country. The company has been recognized by Fox, Daily Herald, MarketWatch, and other news outlets for leading the industry with its American-made fabric. Made with Industrial Grade 8oz Non-Woven Polypropylene, this Sandbaggy Fabric is the toughest in its class and is rated for 205 lbs of tensile strength which is twice thicker than standard fabrics. This Sandbaggy Fabric has various applications such as farming/gardening, landscaping, road stabilization, drainage installations, rip rap & retaining walls, and placing under Geocell. The fabric is engineered to last 50+ years (depends on site conditions) if buried properly with at least 3 inches of gravel or mulch. Unlike standard woven fabrics that are rigid, Sandbaggy Non-Woven Filter Fabric is flexible and easily conforms to uneven surfaces. It boasts some of the best flow rates with 140 GPM per square ft, meaning better drainage and flow-through while being extremely strong. This Sandbaggy Fabric helps prevent clogging, extends drainage system life and performance and is great for french drains, trench drains, and blanket drains. Moreover, this Sandbaggy 8 oz Non-Woven Fabric protects against erosion due to rising sea levels and increasing storm intensity. The thick fabric absorbs and dissipates wave velocity to protect the underlying rock or sand.
- Proudly made in America, supporting American jobs, infrastructure, and families
- Rated for 205 lbs of tensile strength which is twice thicker than standard fabrics
- Has various applications such as farming/gardening, landscaping, road stabilization, drainage installations, rip rap & retaining walls, and placing under Geocell
- Engineered to last for 50+ years (depends on site conditions) if buried properly with at least 3 inches of gravel or mulch
- Flexible and easily conforms to uneven surfaces
- Boasts some of the best flow rates with 140 GPM per square ft, meaning better drainage and flow-through while being extremely strong
- Helps prevent clogging, extends drainage system life and performance and is great for french drains, trench drains, and blanket drains
- Protects against erosion due to rising sea levels and increasing storm intensity
- Absorbs and dissipates wave velocity to protect the underlying rock or sand
2. Dupont Dpgg-50110 8.5-Ounce Groundgrid
The DuPont GroundGrid ground stabilization system is an excellent option for those looking for a geotextile grid that can be used to stabilize the ground during landscape and construction projects. It is made of a flexible material that allows it to conform to any terrain, making it ideal for use in a variety of different environments.
Each grid covers an area of 10 square meters, providing ample coverage for most projects. Additionally, the grid can be easily cut to size, allowing you to customize it to fit your specific needs.
This system is designed to provide long-term stability for your project, ensuring that your ground remains stable and secure for years to come. Whether you are working on a small landscaping project or a large construction job, the DuPont GroundGrid ground stabilization system is an excellent choice.
- Flexible material allows it to conform to any terrain
- Each grid covers 10 square meters
- Can be cut to size
- Provides long-term stability for your project
3. Dupont Dpgg-5055 5.6-Ounce Groundgrid
This grid is made from flexible material that conforms to terrain, making it perfect for a variety of outdoor projects. Each grid can cover up to 10 square meters and can be cut to the desired size. The grid is made in Luxembourg and is of the highest quality.
The flexible material used in the grid allows it to easily mold to the contours of any terrain, making it ideal for use in landscaping or other outdoor projects. The grid is durable and long-lasting, ensuring that it will stand up to wear and tear over time.
The grid can be cut to the desired size, allowing for flexibility in its use. Whether you need a small section for a garden bed or a larger area for a driveway or walkway, this grid can be customized to fit your needs.
Made in Luxembourg, this grid is of the highest quality and is built to last. Its sturdy construction and flexible design make it a great choice for any outdoor project.
- Flexible material conforms to terrain for easy installation
- Each grid covers 10 square meters
- Grid can be cut to desired size
- Durable and long-lasting construction
- High-quality product made in Luxembourg
4. Wall Drain Pro Universal Retaining Wall Block Drain Black 3-Pack
The product is a convenient and time-saving solution for wall construction that doesn't require cutting concrete wall block, timbers or stone. It can be used with any wall material from 3 in. – 8 in. high, and is available in black, grey, and tan. The product is of high quality and is a great way to achieve a polished and professional finish.
The product is incredibly easy to cut with any hand saw, making it a versatile and user-friendly option to use for a variety of applications. It's perfect for both professional builders and DIY enthusiasts who want to save time and effort without compromising quality.
With the product, users can achieve a clean and polished finish that looks great and is sure to impress. Its outstanding performance and durability make it an excellent investment for any wall construction project. Whether you're building a retaining wall or a garden bed, this product is a reliable and efficient option that won't let you down.
- Saves time and effort in wall construction
- Can be used with any wall material from 3 in. – 8 in. high
- Available in black, grey, and tan
- High-quality and durable construction
- Easy to cut with any hand saw
- Provides a clean and polished finish
5. Geo-Fab: Durable Non-Woven Fabric For Landscaping & Construction
Looking for a heavy-duty geotextile that can withstand tough conditions? Look no further than the 6-ounce heavy-duty geotextile from Super Geotextile. Made from non-woven fabrics that are high-strength, this geotextile is tough and durable, ensuring it will last for many years to come. With its superior strength and dimensionally stable design, it is perfect for a variety of projects, including landscaping, retaining walls, French drains, underlayment, erosion control, gardening, riprap filter fabric, pond underlayment, construction projects, and more.
In addition to its durability, this geotextile is also incredibly easy to install. With many sizes available, you can cut down on scrap and get a single piece cut to exact dimensions, saving you time and money. And with its UV/rot resistant design, you can trust that it will stand up to even the toughest conditions.
When it comes to superior quality, Super Geotextile is second to none. Don't settle for lighter weights when you can have the best. Choose Super Geotextile for all your heavy-duty geotextile needs.
- Made from 6-ounce heavy-duty geotextile for superior strength and durability
- Easy to install with many sizes available to cut down on scrap
- Can be used for a variety of projects, including landscaping, erosion control, and more
- UV/rot resistant design ensures it will last for many years to come
- Superior quality from a trusted brand
6. Reliancer Cedar Garden Pathway Roll-Out Boardwalk.
Create a charming and rustic touch to your outdoor surroundings with this generously sized garden walkway. Measuring 8 feet in length and 17 inches in width, this pathway provides ample area for walking through. It is a convenient and cost-effective tool to create an elegant and exotic hardwood deck that you have always dreamed of. Design a multifunctional pathway or a charming landscape decor with this roll-out wood garden walkway.
Made of 100% natural cedar wood, this wooden walkway is denser and has a larger bearing capacity than fir wood. It is pressure treated to prevent deforming, chipping, peeling, cracking, and splitting, making it weather-resistant and suitable for all seasons. The 1-inch thick pressure-treated cedar slats are designed with anti-slip patterns on the surface to improve stability and safety while walking.
The wood slats of this walking path are firmly joined by two rows of heavy-duty rubber cords and spacers, which are more aging-resistant and anti-loosening than nylon ones, and provide better protection to the wood surface. It is maintenance-free, with no nails, screws, or hardware that will require maintenance. The rope connection gives the footpath enough flexibility to unroll over any ground, like beach, stone, mulch, grass, sand, ice, snow, gravel road, damp or muddy ground, boggy, or bare areas.
This garden walkway features a space-saving roll-up design that allows you to combine multiple boardwalks and curved walkways to create a custom unique walkway. No assembly is required, and you can re-arrange, remove or replace the pathway without any hassle. The lightweight path can be used as permanent, decorative walkways to spice up your garden or as a temporary solution to cover muddy, boggy, or bare areas. When not in use, you can easily roll it up into a small size for easy carrying and storage.
This rustic straight wooden pathway is ideal for almost any outdoor space, such as gardens, backyard, patios, porch, balcony, mountain cabins, summer fun beach houses, ocean-front properties, vegetable farm, and perfect for most outdoor activities, such as camping, wedding events, BBQ, and beach party.
- Generously sized garden walkway provides ample area for walking through
- Made of 100% natural cedar wood which is denser and has a larger bearing capacity
- Pressure treated to prevent deforming, chipping, peeling, cracking, and splitting
- Weather-resistant and suitable for all seasons
- 1-inch thick pressure-treated cedar slats are designed with anti-slip patterns on the surface to improve stability and safety while walking
- Firmly joined by two rows of heavy-duty rubber cords and spacers which are more aging-resistant and anti-loosening than nylon ones
- Maintenance-free, with no nails, screws, or hardware that will require maintenance
- Space-saving roll-up design allows you to combine multiple boardwalks and curved walkways to create a custom unique walkway
- Lightweight path can be used as permanent, decorative walkways to spice up your garden or as a temporary solution to cover muddy, boggy, or bare areas
- Ideal for almost any outdoor space and perfect for most outdoor activities
- – None
7. Source 1 Drainage Trench & Driveway Channel Drain With Galvanized Steel Grate – 3 Pack
The 10' Channel with Galvanized Steel Grates, 1 End-Cap, and 1 End-Outlet is a durable and high-performing drainage system that ensures permanent collection and dispersal of standing water. This channel is manufactured from 100% recycled plastic polypropylene, making it an eco-friendly option for your drainage needs. The galvanized steel grates are sturdy and durable, and the channels and grates are rated for 5 tons or 10,000 lbs.
The snap-in and out grates make maintenance a breeze, while the built-in bottom outlet allows for an alternative piping method. The channel can accommodate 3 and 4 sewer and drain pipes, providing versatility in installation. This drainage system is perfect for residential and commercial use, and its durability ensures long-lasting performance.
Overall, the 10' Channel with Galvanized Steel Grates, 1 End-Cap, and 1 End-Outlet is an excellent solution for your drainage needs. Its eco-friendly construction, sturdy grates, and easy maintenance make it a reliable and convenient choice for any property.
- Manufactured from 100% recycled plastic polypropylene, making it an eco-friendly option
- Galvanized steel grates are sturdy and durable
- Channels and grates are rated for 5 tons or 10,000 lbs
- Snap-in and out grates make maintenance easy
- Built-in bottom outlet allows for an alternative piping method
- Accommodates 3 and 4 sewer and drain pipes for installation versatility
- Durable and high-performing for long-lasting performance
8. Nds 864gmtl 5-Inch Pro Channel Drain Kit With Metal Grate, 5 In, Gray
The Pro Series channel drain kit is a highly efficient drainage solution that comes with two galvanized steel grates, pre-assembled channel drain with bottom outlet, one end outlet, and one end cap. The channel, end cap, and end outlet are constructed using polypropylene material, while the grate is made from durable galvanized steel. This channel drain kit is suitable for medium-duty pneumatic tire traffic, autos, and light trucks at speeds not exceeding 20 mph. However, some installations may require a concrete collar to meet load ratings. The load capacity of this product is dependent on encasing it in concrete and should be installed as per the instructions provided by NDS.
The Pro Series channel drain kit is an excellent choice for homeowners and contractors looking for a reliable and efficient drainage solution. The kit is easy to install and comes with all the components required to set up a functioning channel drain system. The polypropylene construction of the channel, end cap, and end outlet makes them resistant to weather and chemical damage, ensuring they last for an extended period. The galvanized steel grate is durable and sturdy, making it suitable for high traffic areas.
Overall, the Pro Series channel drain kit is an excellent investment for anyone looking for a high-quality drainage solution. It is affordable, easy to install, and durable, making it a great value for money. The product is suitable for a wide range of applications, including residential and commercial areas, and can be used to manage water runoff effectively.
- Made from high-quality materials for durability and longevity
- Suitable for medium-duty pneumatic tire traffic, autos, and light trucks
- Comes with all required components for easy installation
- Polypropylene construction makes it resistant to weather and chemical damage
- Galvanized steel grate is sturdy and durable
- – May require a concrete collar for some installations to meet load ratings
9. Flexible Brown Natural Lawn & Landscape Border Edging (8-Pack)
Enhance the look of your garden beds, flower beds, and walkways with this flexible wooden lawn edging. The edging is designed to create a clean and decorative border, which can be customized to any length you desire. With the unique connector pin feature, you can easily snap the edging sections together to form the perfect fit for your garden or lawn.
The do-it-yourself kit is user-friendly and easy to install. Each bundle includes 8 sections of edging, measuring 4 inches high and 30 inches long, totaling 20 feet in length. The pre-attached ground stakes on each section make it easy to install without digging. This flexible wooden lawn edging is perfect for DIY enthusiasts and gardeners who want a beautiful and easy-to-maintain garden.
- Flexible design allows for customization to any length
- Easy to install with no digging required
- Pre-attached ground stakes ensure stability
- Perfect for DIY enthusiasts
- – May not be suitable for larger landscaping projects
10. Pro Drain Kit With Deep Profile Channel
The 5 in. Pro Series Channel Drain Kit with Deep Profile Channel is a reliable solution to prevent mildew growth, concrete staining, and costly structural damage by capturing and conveying excess surface water to drain pipe for release downstream. It is perfect for draining moderate flows from hardscape surfaces such as driveways, concrete and paver patios, courtyards, walkways, and sports facilities.
This channel drain kit comes with channel sections that connect together with interlocking joints, making it easy to use. The bottom outlet connects to 3 in. & 4 in. Sewer and Drain Fittings, while the side outlets connect to 3 in. Sewer and Drain Pipe. The end outlet connects to 3 in. Sewer and Drain Pipe & 4 in. Sewer and Drain Fittings. The 72 GPM per ft. flow rate and 23.5 sq. in. per linear ft. open surface area make it efficient for draining water.
This channel drain kit is rated for NDS Class B Loads (up to 175 psi) when properly installed, making it recommended for medium-duty pneumatic tire traffic, autos, and light trucks at speeds less than 20 mph. It is also ADA compliant. The modular design connects together for longer runs and can be cut to size as short as 4 in. long for smaller sections. The included end cap/outlet combined with integrated bottom outlet and side-outlet knockouts provide 8 outlet options per channel section.
The 5 in. Pro Series Channel Drain is 4-3/4 in. deep and features a modular design with interlocking joints for a secure channel-to-channel connection. Couplings are not required, and it can be easily cut to size in 4 in. increments with saw guide. Channel-to-channel clips reduce motion during installation, while rebar clips instead of lower mount clips make installation easier.
- Efficient for draining moderate flows from hardscape surfaces such as driveways, concrete and paver patios, courtyards, walkways, and sports facilities
- Rated for NDS Class B Loads (up to 175 psi) when properly installed—recommended for medium-duty pneumatic tire traffic, autos, and light trucks at speeds less than 20 mph; ADA compliant
- Modular design connects together for longer runs, can be cut to size as short as 4 in. long for smaller sections
- Included end cap/outlet combined with integrated bottom outlet and side-outlet knockouts provide 8 outlet options per channel section
- Easy to install with channel-to-channel clips and rebar clips
- – Not suitable for heavy-duty traffic
- – May require professional installation
Best Gravel For Drainage Behind Retaining Wall FAQs
Can pea gravel be used for drainage behind a retaining wall or is larger gravel necessary?
Pea gravel can certainly be used for drainage behind a retaining wall, but it may not be the best option in all cases. The size of the gravel necessary for drainage depends on the size of the retaining wall and the soil conditions in the area. In general, larger gravel is better for larger retaining walls and areas with heavy soil that does not drain well. However, pea gravel can work well in smaller retaining walls and areas with lighter soil that drains well.
When using pea gravel for drainage behind a retaining wall, it's important to ensure that the gravel is properly installed and compacted. The gravel should be placed in layers and compacted to prevent settling and shifting over time. Additionally, a drainage fabric should be used between the gravel and the soil to prevent soil from washing into the gravel and clogging the drainage system.
Overall, pea gravel can be a good choice for drainage behind a retaining wall in the right circumstances. However, it's important to consider the size of the wall and the soil conditions in the area before deciding on the best type of gravel to use.
How thick should the layer of gravel be behind a retaining wall for proper drainage?
The thickness of the gravel layer behind a retaining wall for proper drainage depends on various factors such as the height of the wall, the type of soil, and the climate of the area. Generally, a layer of gravel with a minimum thickness of 4-6 inches is recommended. This thickness helps in providing adequate drainage for the water that seeps through the soil and reaches the retaining wall.
However, if the wall is taller or the soil is more porous, a thicker layer of gravel may be required to ensure proper drainage. It is also essential to ensure that the gravel layer is properly compacted to prevent settling, which can cause the wall to shift or tilt.
It is always recommended to consult a professional engineer or builder to determine the appropriate thickness of the gravel layer for your specific retaining wall project. Failure to provide adequate drainage can lead to structural damage to the wall, erosion, and potential safety hazards.
Is it necessary to install a geotextile fabric between the gravel and soil behind a retaining wall?
Yes, it is necessary to install a geotextile fabric between the gravel and soil behind a retaining wall. This fabric acts as a barrier that separates the soil from the gravel and helps to prevent soil erosion. The fabric also allows water to drain through while keeping the soil in place. Without the geotextile fabric, the soil could potentially mix with the gravel and cause the wall to shift or fail over time. Additionally, the fabric helps to improve the overall stability and longevity of the retaining wall. It is important to choose a high-quality geotextile fabric that is appropriate for the specific application and soil type. Proper installation of the fabric is also crucial to ensure its effectiveness. Overall, using a geotextile fabric is a wise investment to protect your retaining wall and ensure its durability for years to come.
What is the purpose of using gravel for drainage behind a retaining wall and how does it prevent soil erosion?
The purpose of using gravel for drainage behind a retaining wall is to prevent soil erosion and water buildup. When water builds up behind a retaining wall, it can cause hydrostatic pressure, which can push against the wall and cause it to fail. The gravel acts as a filter, allowing water to flow through it while keeping soil particles in place. This prevents the soil from being washed away and helps to maintain the stability of the wall.
Additionally, the gravel behind the retaining wall can also help to improve drainage in the surrounding area. By allowing water to flow through it, the gravel can help to prevent water from pooling in low-lying areas and causing damage to nearby structures or landscapes.
Overall, using gravel for drainage behind a retaining wall is an effective way to prevent soil erosion and maintain the stability of the wall. It is a common practice in construction and landscaping projects and is considered an important aspect of proper retaining wall design.
What type of gravel is recommended for drainage behind a retaining wall?
The type of gravel that is recommended for drainage behind a retaining wall is typically a mixture of different sizes of crushed stone. This type of gravel is commonly referred to as "drain rock" or "drainage stone." The reason for using this type of gravel is that it allows for adequate drainage of water behind the retaining wall, which helps to prevent the wall from becoming saturated and potentially collapsing.
When selecting the type of gravel to use for drainage behind a retaining wall, it is important to choose a material that is durable and will not break down over time. Additionally, the gravel should be free of any organic materials, such as leaves or twigs, which can decompose and create blockages in the drainage system.
It is also recommended to consult with a professional engineer or contractor when designing and constructing a retaining wall, as they can provide guidance on the specific type of gravel that is best suited for the project. Overall, selecting the right type of gravel for drainage behind a retaining wall is crucial for ensuring the long-term stability and functionality of the structure.