Pouring a concrete floor in a dirt basement

Waste lines

The most recent house I’ve been working on has dirt basement.  I was excavating a portion of the basement to install a wall between the two units and had to cut out a tree root.  The long term plans for the house are to install a cement floor in the basement and convert the basement to a tall crawlspace.  My plumber still thinks the space would be great for a work space – I’m skeptical.

Anyway, I’m slowly adding portions to the floor (currently about 15SF installed…it’s a slow process).  There is no window into the basement, so I have to hand mix each of the 80lb bags of cement.  It’s heavy, slow work.  Here’s a quick set of pics of my work yesterday.

The plumber will be installing the new water lines this week so he needs a spot for the water heater.  The pile of junk on the dirt floor is exactly where the water heater will go.  Time to move the pile and prep the floor.

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I moved the junk pile and spread some gravel then a 6mil vapor barrier.  The plastic is a little thin for my liking, but it’ll do.  The gravel is there to allow any water that gets into the basement to flow to a future sump pump.

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I cut and built some concrete forms for the 3’x3′ pad.  I cut the 2×4’s in half so I could insert the steel remesh for strength in the concrete.

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I then used some scrap to hold the top and bottom of the form together:

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Next the form was checked and leveled with small stones in the low corners:

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Then the mixing began.

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Bag by bag, the forms filled up.

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While it felt like a long day, the actual mixing only took about 30 minutes.  Setting and leveling the forms took almost an equal amount of time.

I need an official HBS shirt!

I need an official HBS shirt!

Finished concrete - a little soupy.

Finished concrete – a little soupy.

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