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Marine Blocks | From start to finish



From start to finish our patent pending marine blocks are built with the utmost care and craftsmanship. Before the blocks are even poured, each one already has an hour of grinding and welding in them. Each block has a rebar cage that is custom made in our shop and inserted into the forms before the concrete is poured.

Rebar Cages made in the Demex shop,
Rebar Cages made in the Demex shop

Our custom forms line the back side of our Avon Lake Shop. Cable for lifting the blocks is secured to the rebar cage just before the pour.

Demex Crews getting ready to pour a marine block
Demex Crews getting ready to pour a marine block

Every concrete truck is full of a specially formulated concrete mix, ready to withstand the power of Lake Erie.

Demex Crews pouring a marine block
Demex Crews pouring a marine block

Demex Crews pouring a marine block
Demex Crews pouring a marine block


Demex Crews pouring a marine block
Demex Crews pouring a marine block

As the concrete is poured, one of the laborers uses the vibro hammer to ensure there are no air bubbles in the block. It requires 2-3 crew members to pour each block,

Demex Crews pouring a marine block
Demex Crews pouring a marine block

Once poured, the form cap is removed and the block is edged and finished. The core will be filled with concrete when the blocks are placed in their final structure.

Freshly poured marine block
Freshly poured marine block

After the forms are released and the blocks fully cured over several days, they are ready to head to their next stop. Five at a time the blocks leave the yard on our lowboy semi trailer and head to either our barge load site or a customers job site.

Demex's marine blocks headed to the barge
Demex's marine blocks headed to the barge

Demex's marine blocks headed to the barge
Demex's marine blocks headed to the barge

Our barges often operate in tandem, one bringing armor stone, the other our marine blocks to be staged at a job site.



Demex's marine blocks being unloaded at a job site
Demex's marine blocks being unloaded at a job site

Demex's marine blocks stockpiled at a job site
Demex's marine blocks stockpiled at a job site

Our blocks are most often used for sea walls and piers. Here are several projects during their construction phase.


Early construction phase of a pier built with Demex's marine blocks
Early construction phase of a pier built with Demex's marine blocks


Early construction phase of a seawall built with Demex's marine blocks
Early construction phase of a seawall built with Demex's marine blocks





Early construction phase of a seawall built with Demex's marine blocks
Early construction phase of a seawall built with Demex's marine blocks


Early construction phase of a pier built with Demex's marine blocks
Early construction phase of a pier built with Demex's marine blocks

Early construction phase of a retaining wall built with Demex's marine blocks
Early construction phase of a retaining wall built with Demex's marine blocks

Those photos might not look like much, but take a look a little farther into the projects...



Mid construction phase of a retaining wall built with Demex's marine blocks
Mid construction phase of a retaining wall built with Demex's marine blocks

Mid construction phase of a redi rock wall foundation built with Demex's marine blocks
Mid construction of a redi rock wall foundation built with Demex's marine blocks

Mid construction of a pier built with Demex's marine blocks
Mid construction of a pier built with Demex's marine blocks

Now a look at some of the finished or near finished projects as they all came together for a more enjoyable and accessible shoreline for our clients.


Finished Redi Rock Wall and Patio built on Demex Marine Blocks
Finished Redi Rock Wall and Patio built on Demex Marine Blocks

Finished Redi Rock Wall and walkway built on Demex Marine Blocks
Finished Redi Rock Wall and walkway built on Demex Marine Blocks


Mid construction of a pier built with Demex's marine blocks
Mid construction of a pier built with Demex's marine blocks

Mid construction of a pier built with Demex's marine blocks
Mid construction of a pier built with Demex's marine blocks

Now that you have an idea what is possible with our marine blocks, what kind of projects can you dream up?

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