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2-1/2-in Black Plastic Deck support

Ratings & Reviews for TuffBlock 2-1/2-in Black Plastic Deck support

4.7
349
Review
 4.7 out of 5
349 Reviews


97% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The product is praised for being lightweight and easy to handle, providing a sturdy and durable foundation, and being convenient and easy to install without the need for digging or burying. While the cost may be higher than traditional concrete blocks in some cases, the product is considered a game-changing alternative that makes deck and shed construction more accessible, especially for DIY projects.

Customer review summary generated by AI, including incentivized reviews.
349 Customer Reviews

Only use when needed, not a replacement

Would Recommend

Would work in a pinch or if digging a hole isnt possible

May 14, 2026
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Much easier than goncrete

Would Recommend

Lightweight compared to concrete, says it is made from recycled plastic and more durable. Lower profile for short deck

May 12, 2026
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God but pricey

Would Recommend

Easy install and high height capacity. Quite pricey for what it is. Concrete blocks are way cheaper but take more labor to move around and install.

May 12, 2026
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This erected my board license straight

Would Recommend

This made my wood stand up straight

May 11, 2026
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Super easy quick deck or patio base

Would Recommend

Super easy to use they fit a treated 4x4 super snug love how you can use 4x4 on one end and be level on the the other end. Just remember when using gravel that 4x4 make them more inset than if the joist is directly in the groove. There is 2 labeled 1&2 different widths.

May 11, 2026
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Easy to use and light weight.

Would Recommend

This item worked great for the posts of a raised deck to go around the above ground pool.

May 11, 2026
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Works great

Would Recommend

Very easy to use, worked out great for the project i was doing. Highly recommend.

May 10, 2026
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Tough enough!

Would Recommend

Great tough blocks! Easy to use to build our shed floor and even things out!

May 10, 2026
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Love the ease of use

Would Recommend

This product made my lean to shed project a lot easier to build and align, will be using on other projects !

May 10, 2026
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In the ground rote free support.

Would Recommend

Great in ground support easy to use and would not Detroit’s as wood would.

May 9, 2026
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If you’re working on unlevel ground have posts

Would Recommend

Creates a solid foundation without any digging or concrete made this project a lot easier

May 9, 2026
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Low cost for immense weight support

Would Recommend

Very sturdy

May 6, 2026
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Works for me!

Would Recommend

Perfect for the Base in my Dragon Fruit Trellis Planter.

April 28, 2026
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perfect for our shed sub floor

Would Recommend

Super light and convenient

April 27, 2026
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Works well

Product works as expected

April 27, 2026
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Great support.....

Would Recommend

Ease of use. Very stable & supports your deck with multiple products being used.

April 27, 2026
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Convenient quality support for no dig situations.

Crazy convenient product. This is such a good idea for added support with digging.

April 24, 2026
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