Best Concrete Deck Blocks for Shed Foundations and Decks
Choosing the right deck blocks can simplify shed foundations, elevate decks, and protect against ground moisture. This guide highlights durable, easy-to-install options designed for American homeowners. Each product below is suited for supporting sheds, decks, or pier-and-beam constructions, with varying heights, load capacities, and adjustability. Use the buying guide to compare features like load ratings, material, compatibility with joists and posts, and installation requirements.
Summary of Selected Products
- USA Made Original Round Foundation Block (10-Pack) – BullKE
- Deck Blocks, 10PCS Adjustable Deck Support – NAXVIO
- USA Made Foundation Block – Deck Support – Handi Block – BullKE
- 50 Pack Deck Block, Adjustable – NAXVIO
- Myard PNP153544 Deck Foundation Block – Wood/Composite Support
USA Made Original Round Foundation Block (10-Pack)
Durable and strong hand-held round floating deck blocks provide secure footing for posts and beams. The design elevates footing above ground for enhanced stability, with a 10-inch diameter and 1 7/8-inch height. Proudly made in the USA from 100% recycled plastic, this pedestal emphasizes sustainability without sacrificing performance. Suitable for pier, post, and beam construction on sheds or small decks, the round base resists harsh outdoor conditions and weather exposure.
Deck Blocks, 10PCS Adjustable Deck Support Pedestal
Adjustable height from 1-3/16″ to 2-3/8″ makes this pedestal versatile for leveling uneven ground or creating space beneath a deck or shed. Constructed from UV-protected polyolefin and engineering plastic, these blocks resist chipping and cracking. Their vented design reduces water buildup, and each block supports up to 2,204 lbs at the lowest position (and 1,102 lbs at maximum height), accommodating various deck configurations while avoiding heavy concrete work.
USA Made Foundation Block – Handi Block
This deck support hand block offers a robust solution for decks, sheds, pathways, and raised walkways. It fits standard joists and posts, providing a stable footing without digging. The block is designed for easy installation and long-term durability, suitable for elevated decks, pergolas, and similar outdoor projects. Each unit is made in the USA from recycled materials, aligning with sustainability goals while delivering heavy-duty support.
50 Pack Deck Block, Adjustable Deck Support Pedestal
This 50-pack kit offers a versatile leveling system for multiple levels of decking, sheds, and pathways. Height is adjustable from 18MM to 30MM, with a vented design to prevent water buildup. Made from UV-protected polyolefin and engineering plastic, these blocks balance durability with ease of installation. They accommodate various substructures (WPC, wood, aluminum) and provide reliable stability for long-term outdoor projects.
12 Pack Foundation Deck Blocks – 3.5×3.5 Posts
Designed to accommodate 3.5×3.5 inch wood posts and 1.5 inch wide beams, these blocks aim to deliver balanced load capacity (up to 1,700 lbs per block) with a central drain for easier cleaning and reduced erosion. The central drainage design minimizes water pooling, helping maintain deck integrity and reducing maintenance costs over time. Ideal for decks, sheds, floating docks, and similar structures requiring steady foundations.
Buying Guide
- Load capacity: Choose blocks with a load rating that matches or exceeds your deck or shed’s weight, including anticipated equipment and snow loads in your area.
- Height adjustability: If your site has uneven ground or you want drainage clearance, select pedestal blocks with adjustable height and screw-ring mechanisms.
- Material and durability: UV-protected plastics and recycled materials offer durability and environmental advantages, but verify weather resistance for long-term exposure.
- Post and joist compatibility: Confirm the block’s compatibility with standard joists (e.g., 2×4, 2×6, 2×8) and posts (such as 4×4) to ensure a snug fit without modifications.
- Vent design and drainage: Blocks with venting or drainage channels reduce water accumulation, preventing wood rot and reducing maintenance.
- Number of blocks and kit contents: For sheds or multi-level decks, a larger kit can speed up installation and provide redundancy for sturdiest support.
- Installation ease: Lightweight blocks with simple screw-ring height adjustments can save time and reduce labor but verify that the weight capacity suits your project.
When evaluating options, balance durability, ease of installation, and long-term performance. For sheds and low decks in areas with freeze-thaw cycles or heavy rainfall, prioritize blocks with high load ratings, good drainage, and UV-resistant materials. If you anticipate frequent reconfiguration or seasonal use, consider adjustable pedestals that simplify height changes without tools.