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Old 06-23-2009, 07:24 PM   #1
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Default Painted floor question

I just won a bid to paint an existing floor in a school. It is raw concrete and around 40 years old. It has been worked hard as a "machine shop" classroom at a vocational.

They want it painted grey/gray.

Can you guys offer up any preffered methods?

Thanks!
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Old 06-25-2009, 11:18 PM   #2
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pressure wash, spot prime with oil and use good old Floor Paint specially made for these applications. it's self priming and rolls out nicely. i've even used DTM paint for a basement floor that gets a lot of traffic and it's holding up beautifully 3 years later.

don't use Aura, it's not intended to be walked on over and over.

good luck
j
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Old 06-25-2009, 11:59 PM   #3
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How beefy of a floor do they need? If you are just selling a painted floor, thats not worth that much. If you are selling a bomber floor you can make really good money, maybe a waterborne epoxy with a waterborne clear on top unless you need to go even beefier (its whats for dinner) and do a solvent based product.
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Old 06-26-2009, 01:04 AM   #4
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Quote:
Originally Posted by Brian339 View Post
I just won a bid to paint an existing floor in a school. It is raw concrete and around 40 years old. It has been worked hard as a "machine shop" classroom at a vocational.

They want it painted grey/gray.

Can you guys offer up any preffered methods?

Thanks!
I don't want to be stepping on your toes, but isn't this a little late to be asking? you bid a certain amount for a certain type of product right? All products have their cost and labor hours very. For me I would have been asking these questions before I bid, and also talk with the people that will use the floor as to what kind of traffic. Now you will have to ask yourself how much you can afford and all. This is really like backing into a job. I know most pros would be throwing their hands up at this way of bidding work.I really don't mean bad, I just don't understand this.
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Old 06-26-2009, 01:32 AM   #5
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I don't want to be stepping on your toes, but isn't this a little late to be asking?
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Old 06-26-2009, 11:14 PM   #6
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I get the work regardless of price. I bid at $2 sq ft for a 4500 sq ft floor.

Its a $9k budget. It will take me one day to put a coat of anything they want down. This is the simpliest of choices.

The budget will hold water in most cases.
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Old 06-27-2009, 07:35 AM   #7
 
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Thumbs up

Lol.
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Old 06-27-2009, 04:57 PM   #8
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Quote:
Originally Posted by Brian339 View Post
I just won a bid to paint an existing floor in a school. It is raw concrete and around 40 years old. It has been worked hard as a "machine shop" classroom at a vocational.

They want it painted grey/gray.

Can you guys offer up any preffered methods?

Thanks!
Holy crap dude ......you might of wanted to know this before your bid.

A machine shop???? Walk away ....no run!!!!!

That floor is so saturated in oil you will never extract it all.
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Old 06-27-2009, 04:58 PM   #9
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Quote:
Originally Posted by Brian339 View Post
I get the work regardless of price. I bid at $2 sq ft for a 4500 sq ft floor.

Its a $9k budget. It will take me one day to put a coat of anything they want down. This is the simpliest of choices.

The budget will hold water in most cases.
$2 per sq/ft wont even cover material.
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Old 06-27-2009, 06:19 PM   #10
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Power wash then acid etch I am guessing,Or Diamond grinding?.
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Old 06-27-2009, 08:44 PM   #11
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BM oil emulsifier. Probably after grinding.
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Old 06-27-2009, 09:50 PM   #12
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Degreasers are the only way, but you will have to be able to rinse them off completly. You can't rinse them into a drain or you get a fine. If there is oil on concrete when you put a finish on it the oil is attracted to the finish and comes up to the the top,this is where your finish will start to fail.After 40 years of bare concrete you would think that there would be some machine oil soaked in.How many gallons of oil do you think has been spilled on the floor in that time.
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Old 06-28-2009, 07:23 AM   #13
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Quote:
Originally Posted by NEPS.US View Post
Holy crap dude ......you might of wanted to know this before your bid.

A machine shop???? Walk away ....no run!!!!!

That floor is so saturated in oil you will never extract it all.

I agree- they should consider carpet or one of the new styles of garage flooring they have available now.
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Old 07-08-2009, 01:05 AM   #14
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just pave it, it has enough petro in the floor already to start a good tar...
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Old 07-08-2009, 06:56 AM   #15
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A sodium hydroxide/butyl based cleaner followed by a surface cleaner with 220 degree water at 3500 psi. Water must be contained and filtered and sent to a sanitary drain. Sub that out for $500.00 Don't let anyone tell you they can clean it without chems or with cold water.

I would think you are going to need some type of commercial epoxy coating.
http://www.everlastepoxy.com/

added: Before I even pressure washed I would use an oil eating enzyme and let it sit for a couple of weeks. As long as there is no traffic on it now.
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Old 07-12-2009, 04:52 PM   #16
 
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Break out the "epoxy paint". To hell with surface prep (no acid etching) as theres nothing there for the paint to attach to and its too costly to acid etch. GLUE IT DOWN. Part A GLue, Part B Paint, mix together and roller on. Its there for a life time. Nice sheen, no hassels. You are now the master.
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I just won a bid to paint an existing floor in a school. It is raw concrete and around 40 years old. It has been worked hard as a "machine shop" classroom at a vocational.

They want it painted grey/gray.

Can you guys offer up any preffered methods?

Thanks!
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