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This is a firepit I made from scratch on a sloping block.
Materials
Tools
Render
Cobble stones
Sealer
Concrete
Mortar
Reinforcing mesh/rod
Paint
Sand
Black plastic
Render trim
Treated pine sleepers
Ag pipe
Steps
Step 1
1/5The back yard was incredibly overgrown, so a fair but of clearing was needed before I could start building.
Once cleared, I started cutting into the slope and levelling out the ground. The back of the firepit seat will also act as a retaining wall. I then used a whacker Packer so I could start with a firm surface.
I then dug out the trenches which would be filled with concrete for the footings.
Step 2
2/5Once the bricks were laid I prepared the top slab with reinforcing mesh and the rods were drilled into the brickwork to prevent sinking.
Once the slab was set. I then finished the back rest and started rendering.
Step 3
3/5I didn't want to risk paint dripping on the new pavers, so I decided to paint the rendered brick first, before starting laying the pavers
I placed down black plastic before a layer of paving sand. Then I started laying the cobblestones. The paving is laid on a gentle angle to allow water run off.
After filling the gaps with sand and cement, I sealed the pavers with two coats of sealer.
Step 4
4/5Finally, I inserted the metal fire pit bowl, put down the top soil around the edges, and sprinkled some grass seed to help the lawn grow.
I also added a heap of plants around the outside which should look great when they are established.
Step 5
5/5
Afternoon @Codey
Why do we always end up with projects that have finish dates that are fixed! 
Well done on getting it done in time!
Dave
Hello @Matkai
Welcome to the Bunnings Workshop community. It's sensational to have you join us.
Let me tag @Codey to make them aware of your question. I suspect that formwork was used to create such a fancy looking backrest, but it's possible that Codey is that talented with a trowel. Let's wait for their confirmation on how they built the back rest.
If you need further assistance, please let us know.
Eric
Hey mate,
Thanks for asking, here's some more images which show more about the backrest construction.
I started by building the back wall in line with the rest of the seat. Then I drilled holes for the reinforcing bar for added support.
To create the sloped part of the backrest, I first started with a run of angle cut bricks, then each subsequent brick was simply laid on top, with the void being filled with concrete. To maintain the correct angle, I created a template out of corflute which could be periodically referenced throughout the process.
The final curve shape was made with an angle grinder, refined through the rendering process.
I hope this helps 👍
Happy building,
Codey
