When it comes to protecting your home or building from water damage, foundation drainage is one of the most important factors to consider. One often overlooked—but incredibly effective—solution is using the right type of drainage stone. Whether you’re a homeowner managing water runoff or a contractor preparing a construction site, knowing which stones to use can save you thousands in future repairs.
Let’s break down why stone drainage matters, what options work best, and how to choose the right stone for your foundation.
Why Is Drainage Around Foundations Important?
New Jersey weather can be unpredictable—rainstorms one week, snowmelt the next. Without proper drainage, water can pool around your home’s foundation, increasing the risk of:
- Basement flooding
- Foundation cracks
- Mold growth
- Soil erosion
- Structural shifting
These aren’t just inconvenient issues—they’re expensive. Drainage systems that use quality materials like the right type of stone can significantly reduce these risks and keep your property safe and dry.
What Makes a Good Drainage Stone?
Not every rock is created equal when it comes to drainage. The best drainage stones share the following characteristics:
- Angular Shape: Helps lock stones together while allowing water to pass through.
- Large Particle Size: Prevents compaction and maintains gaps for water flow.
- Durability: Withstands pressure without breaking down or compacting over time.
- Cleanliness: Free from fine dust or sand that can clog systems.
Now, let’s explore the most popular stone types that meet these criteria.
1. ¾-Inch Crushed Stone (Also Known as Clean Stone or #57 Gravel)
This is hands-down one of the best options for foundation drainage.
Why it Works:
- Clean, angular stones that don’t compact easily
- Excellent for French drains, foundation backfill, and curtain drains
- Maintains good water flow while supporting weight
Ideal Uses:
- Around basement foundations
- Underneath downspouts and gutters
- In drainage trenches or behind retaining walls
At Kirk Allen Landscape Supply, we carry ¾” clean stone in bulk for contractors and homeowners looking to get the job done right.
2. River Rock
River rock is a smoother, rounded alternative that also works well for drainage—though with some caveats.
Why it Works:
- Large gaps between stones allow for good water movement
- Attractive appearance if part of exposed landscaping
Things to Consider:
- Smooth, round shape may shift more easily than angular stone
- Less stable in retaining wall or tightly packed systems
Use river rock in surface-level drainage systems, swales, or decorative dry creek beds that still serve a purpose.
3. Pea Gravel
Pea gravel is a popular material for landscaping, but its role in drainage is somewhat limited.
Pros:
- Affordable and widely available
- Good for light runoff and small-scale drainage
Cons:
- Small, round pebbles tend to shift and compact
- Can become clogged with debris over time
While it can be used around some shallow areas, pea gravel isn’t recommended directly against foundation walls. For best results, use it in tandem with landscape fabric or as a top layer over more substantial drainage material.
4. Recycled Concrete Aggregate (RCA)
Looking for a budget-friendly and sustainable option? Recycled concrete might be worth considering.
Why it Works:
- Typically angular and well-sized for drainage
- Cost-effective for large projects
Considerations:
- Not always uniform in size or material quality
- May contain fines that affect drainage if not washed
For contractors trying to stretch budgets on larger construction jobs, RCA is a practical alternative—just be sure to source it from a reputable supplier like Kirk Allen.
Pro Tip: Pair Your Drainage Stone with Proper Installation
Even the best drainage stone won’t perform well if installed incorrectly. Here’s a basic guide to doing it right:
- Excavate the Trench or Perimeter – Slope it slightly away from the house (at least 1% grade).
- Lay Landscape Fabric – Prevents soil intrusion and keeps the system free-flowing.
- Add Drainage Pipe (if needed) – Perforated pipe wrapped in filter fabric is ideal for heavier flows.
- Add Your Stone – Backfill around and over the pipe (or just with stone if no pipe is used).
- Wrap & Cover – Fold over the landscape fabric and top with soil or gravel as desired.
For larger projects, bulk delivery can help save time and money. Give us a call at 973-347-3117 to schedule your stone drop-off today.
What Stone Should You Avoid?
Some stones may look appealing but aren’t great for drainage purposes. Avoid these in foundational work:
- Sand or stone dust – They compact easily and clog quickly.
- Clay-heavy materials – Poor permeability and drainage.
- Unwashed or mixed stones – Can contain fines that block water flow.
If you’re unsure about a material you’re considering, our team at Kirk Allen Landscape Supply can help you evaluate the right choice for your specific site.
Why Source from a Local NJ Supplier?
When you source drainage stone from a local supplier like Kirk Allen Landscape Supply, you’re not only supporting a New Jersey business—you’re also getting:
- Faster delivery times
- Better pricing on bulk materials
- Knowledgeable staff who understand local conditions
Whether you’re a contractor needing 20 tons of gravel or a homeowner doing a small foundation project, our team has your back.
Final Thoughts: Choose Smart, Drain Well
Water damage isn’t something you want to gamble with. The right drainage stone around your foundation acts as a reliable barrier against the elements—keeping basements dry, soil stable, and homes safe.
If you’re in North or Central New Jersey and need high-quality drainage stone for your project, Kirk Allen Landscape Supply is here to help. We offer bulk delivery, contractor pricing, and real guidance based on decades of experience.
Call 973-347-3117 today or visit our website to order your drainage stone and keep your foundation protected the smart way.
