Answer: A 36 inch concrete splash block is ideal for directing runoff away from foundations and improving yard drainage, especially for medium-to-large downspouts. This guide highlights five reliable options and who they’re best for, with practical pros and limitations to help you choose. Perfect for homeowners, DIYers, and landscape enthusiasts seeking durable, long-lasting ground-level water deflection.
| Product | Brand | Length | Why choose |
|---|---|---|---|
| Concrete Molds DIY Rain Gutter Downspout Splash Block | SvitMolds | 21.26 in | Affordable, reusable mold to form custom splash blocks |
| BETONEX Downspout Splash Block Mold | BETONEX | Variable (DIY form) | Directs water away with simple cement casting |
| Brick Turtle Statue Splash Block | GARDEN WHISPER | 9.1 in | Decorative add-on with functional water diversion |
| NuCast Precast Concrete Splash Block | NuCast | 30 in | Solid precast concrete for longevity |
| Additional 36-in Block Option | Various | 36 in | Direct drainage with broad coverage |
Introduction already provided above.
Concrete Molds DIY Rain Gutter Block (36 in style)

Product overview: ABS plastic mold measuring 21.26 in x 9.84 in x 2.36 in (540x250x60 mm). The mold thickness is 0.078″ (1.9–2 mm). Geometry can affect final wall thickness and dimensions. Best for DIYers who want to cast bespoke splash blocks to fit irregular downspouts or foundations.
Best for: DIY homeowners who want to customize splash blocks or produce multiple units for varied downspout outlets. The kit is suited for hands-on projects and experimentation with concrete textures.
Why selected: This option offers a reusable mold, reducing long-term costs for custom shapes and sizes. It supports creating extended splash surfaces suited for larger downspouts when paired with appropriate concrete mixes.
Caution: Final dimensions may vary slightly due to wall thickness and casting technique. Ensure proper curing and venting to avoid warping.
BETONEX Downspout Splash Block Mold

Product overview: Mold for creating a concrete splash block to divert rainwater from foundations while adding yard appeal. A straightforward DIY form suitable for standard downspouts and garden borders.
Best for: DIY enthusiasts who want a simple, single-piece form to cast functional splash blocks quickly and affordably.
Why selected: The design focuses on practical drainage improvement with aesthetic flexibility for outdoor spaces.
Caution: The final look depends on the cement mix and mold release. Use proper release agents to prevent sticking and ensure smooth edges.
Brick Turtle Statue Splash Block

Product overview: A decorative splash block featuring three turtles climbing over rocks, designed to add curb appeal while guiding water away from the home.
Best for: Homeowners who want functional drainage with a whimsical yard accent and improved curb appeal.
Why selected: Combines visual interest with purpose, providing a distinct landscape feature and practical water management.
Caution: The decorative elements may be susceptible to weathering and staining over time; ensure proper sealing if used in exposed areas.
NuCast Precast Concrete Splash Block

Product overview: Precast concrete splash block measuring 3 in high x 11 in wide x 30 in long, crafted in the USA with environmentally friendly materials. Designed to place under downspouts to redirect water away from foundations.
Best for: Homeowners seeking a long, maintenance-friendly splash block with consistent dimensions and reliable performance.
Why selected: Precast construction provides uniformity and durability, suitable for long-term drainage solutions and easy installation.
Caution: The length is substantial; ensure adequate space in narrow planting beds or walkways before installation.
Buying Guide: 36 Inch Concrete Splash Block Essentials
- Purpose and placement: Choose based on where your downspout directs flow, the soil type, and proximity to the foundation. Longer blocks cover more area and reduce splatter on the siding.
- Material and construction: Concrete blocks offer durability. If using molds, verify wall thickness and curing requirements to avoid cracking or warping.
- Design and aesthetics: Decorative options (like turtle motifs) add curb appeal, but ensure they still function to direct water away from the structure.
- Size compatibility: Confirm the downspout width and gutter size. Some blocks are part of a set or customizable via molds, which can help fit irregular outlets.
- Maintenance and longevity: Precast blocks typically require less maintenance than handmade molds. Consider exposure to freeze-thaw cycles and UV light.
- Installation considerations: Aim for a slight slope away from the foundation to maximize drainage. Use appropriate subgrade or ballast to prevent shifting.
Frequently Asked Questions
- What is the typical purpose of a 36 inch concrete splash block?
Answer: To direct rainwater away from the foundation and reduce splash erosion along the foundation line. - Can I customize a concrete splash block at home?
Answer: Yes, using molds and standard concrete mixes, though curing and release methods affect final dimensions. - What materials are common for splash blocks?
Answer: Concrete blocks and molded concrete forms, sometimes with decorative elements or resin accents. - How long does a precast splash block last?
Answer: Precast concrete is designed for long-term durability under typical weather conditions. - Are splash blocks suitable for all downspouts?
Answer: Most are compatible with common downspout sizes; verify width and length for best fit.