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cverdi2 02-15-2011 11:25 PM

how do I make a form for cement gas firepit
I just want a simple round firepit but cant figure out how to make a form for cement

Bud Cline 02-15-2011 11:30 PM

Use retaining wall blocks. They make them for making circles.:) I've used one/them for years in my yard.:)

Bondo 02-16-2011 09:40 AM

Ayuh,.. Concrete is Not the best thing for having a fire in,...
It'll spald, 'n possible Blow chunks at you as it gets extremely Hot...

Jackofall1 02-16-2011 09:54 AM

Welcome cverdi2, to the best DIY'r site on the web.

I have to agree with both the gentlemen who offered the first 2 comments. You could get some fire brick, as opposed to landscaping block, but concrete is a no no.


jomama45 02-16-2011 10:44 AM

2 Attachment(s)
Not sure exactly what you have in mind for the design, but here's 2 pics of one we did inside of a patio last year:

Attachment 29881

Attachment 29882

Ditto on using firebrick as well, as concrete is not the proper substrate to have that close to a fire. If on a tighter budget, steel rings work as well.

cverdi2 02-16-2011 11:18 AM

I will be placing a fire bowl inside the pit

Originally Posted by Bud Cline (Post 591987)
Use retaining wall blocks. They make them for making circles.:) I've used one/them for years in my yard.:)

wont that be okay, was going to use a burner ring and fill it with the crushed glass, just trying to come up with a round decorative form to hold it?

Bud Cline 02-16-2011 05:39 PM

Cement retaining wall blocks are not the best type of block to use for a fire ring but they last a considerable time and are easily replaceable. It just depends on how serious a guy is about having a fire ring. Gas fire rings don't put off that much heat anyway.:)

Mine has several cracked blocks from the heat but is only eight years old. Adds to the character.:):yes:

Bondo 02-16-2011 06:06 PM

Ayuh,... I've got several firepits at different properties,...

1 is an old dayton truck wheel, with a piece cut outa the side,... 24" diameter...
It just sits on the shoreline rocks at the Lodge in Maine...

1 is an 18" section of a 36" diameter propane tank...
It sits on loosely set old chimmey bricks, on top of the concrete patio, shore-side on the Chaumont river...
The bricks break up over time, but protect the concrete below 'em...

The 1 in the backyard is a piece of 48" hi-way steel culvert, about 2' tall...
It just sits on the ground...

The Hammer 02-16-2011 08:01 PM

3 Attachment(s)
After looking at Jomama's pics I'm almost embarrassed to post these.

This is the project I started last year and hope to finish this summer.

I needed a retaining wall to raise the backyard to level to the garage.

I was able to get the granite slabs and old used cobblestones for cheap. My wife and I furnished the labor. I wanted to incorporate a firepit/cooking center and had the same problem as you have my simple solution was to cut and nail eight equal length pieces of 2 + 4 cut at 22.5 degrees on my mitre saw which gave me an octagon to use as a form. I poured my pad and laid my stone in a circle. the edges of the pad will not even be visible when I'm done. I did this because I couldn't figure out how to make a circle.

Here are a few pics, one is the pad, another is the pit and the third is a grill I had welded to build the fire on.

My intention is to have the pit waist high on the low side of the wall while it's in the ground when I fill the backside of the wall.

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