Tuff Block Floating Foundation System
What TuffBlock Is
TuffBlock (sometimes styled “TUFFBlock”) is a pre-manufactured deck footing and foundation system made from high-density polypropylene plastic. It replaces or supplements poured concrete footings for decks, pergolas, sheds, gazebos, and similar structures.
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Instead of digging holes and pouring wet concrete, you set TuffBlocks into excavated soil/ground and build directly on them. They’re engineered to support significant loads while resisting moisture, rot, and most soil chemistry issues.
Key Features
Easy Installation (DIY-Friendly)
- No mixing, pouring, or curing of concrete
- Works well in tight spaces, slopes, or rocky soil
- Just level the ground, place blocks, and install posts
Built for Outdoor Conditions
- Durable polypropylene plastic resists moisture, chemicals, and freeze-thaw cycles
- Won’t rot, degrade, or attract pests unlike timber sole plates
- UV-stabilized to resist sun damage
Modular & Engineered Design
- Each block has pre-formed pockets or saddles to support 4x4, 6x6, or larger post bases
- Sized and tested for load-bearing in residential deck applications
- Often used with recommended structural screws and connectors
Typical Applications
TuffBlock is commonly used for:
✔ Deck supports and perimeter footings
✔ Posts for pergolas and shade structures
✔ Shed foundations
✔ Deck stairs and landing supports
✔ Fences in some installations
It’s especially appealing when:
- Traditional concrete pours are hard or costly
- Working in winter or wet conditions
- You need a clean, quick install
An individual TuffBlock can support over 1,700 lbs and weighs only 1½ lbs. Designed to accept 2” x 4”, 2” x 6”, 2” x 8” Joists and 4” x 4” Posts, TuffBlocks truly are the lightest, most versatile and easy to use deck foundation system on the market. No more ugly concrete blocks in your yard. The slimline profile and satin black finish means a TuffBlock easily blends into the landscape and surrounds.
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