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Old 09-10-2007, 07:41 PM   #31
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Concrete problem in garage?


It's the top of the ninth and the builder is wavering. He is now suggesting flushing the areas from the salt additives, prepping the surface, and applying an epoxy coating. He states the epoxy coating will provide a uniform color and texture and add to the resale value of the home. He's also saying that epoxy coating is more expensive than replacing the concrete.

He's also stating that if we proceed with the re-pouring of the garage I will need to acknowledge that I understand that there will be saw cut lines around the HVAC equipment and water heater, and that the newly poured concrete may not match the old. Plus, fibrous expansion joints may need to be added creating additional cosmetic blemishes.

Sounds like a scare tactic to me. What do you think?

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Old 09-10-2007, 08:38 PM   #32
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Concrete problem in garage?


Just out of curiosity, how much does it cost to have an epoxy coating applied to a garage floor? Also, what is the best epoxy product on the market?
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Old 09-11-2007, 09:17 AM   #33
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His concerns about the new slab are all valid. And I wouldn't be surprised if the epoxy coating does cost more.

A good epoxy coating would certainly be a value upgrade but I don't know how well you can flush excess Calcium Chloride from a slab and I don't know how well the epoxy will bind to the slab where the calcium chloride level is high. You probably need to talk to the epoxy manufacturer that he plans on using.
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Old 09-11-2007, 10:09 AM   #34
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Concrete problem in garage?


How about just ask him to break those area's concrete where it shows mark, then fill with new concrete, then epoxy on top.... as a compromise...
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Old 09-11-2007, 10:11 AM   #35
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Concrete problem in garage?


Does that core show a massive void of liquid concrete under the slab? It looks like there's an inch of concrete, and just below it, a hole the size of a coconut!

If that's the case, I don't know how "flushing" anything will rid your floor of any other hidden "jelly donuts" in your floor.

If you're thinking about the epoxy fix, talk to an engineer you trust, to see if it's going to do anything to address the problems in your slab. I'd be worried about my car tire falling into a little sinkhole, and I don't think a shiny epoxy floor would prevent that.
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Old 09-11-2007, 10:17 AM   #36
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Quote:
Originally Posted by KUI****G View Post
How about just ask him to break those area's concrete where it shows mark, then fill with new concrete, then epoxy on top.... as a compromise...
That's what I emailed the builder last night and I felt it was a reasonable compromise. No response yet.
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Old 09-11-2007, 10:19 AM   #37
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Does that core show a massive void of liquid concrete under the slab? It looks like there's an inch of concrete, and just below it, a hole the size of a coconut!

If that's the case, I don't know how "flushing" anything will rid your floor of any other hidden "jelly donuts" in your floor.

If you're thinking about the epoxy fix, talk to an engineer you trust, to see if it's going to do anything to address the problems in your slab. I'd be worried about my car tire falling into a little sinkhole, and I don't think a shiny epoxy floor would prevent that.
I agree. The engineer is recommending demolishing and re-pouring the concrete.
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Old 09-11-2007, 10:22 AM   #38
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Concrete problem in garage?


Well I'd just stick with the engineer's recommended fix. That seems simple. The builder brought in this engineer, correct? He should have no argument with fixing it per the engineer's recommendations.

Is the engineer recommending removing the HVAC to complete the demo and re-pour?
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Old 09-11-2007, 10:25 AM   #39
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Concrete problem in garage?


No, he doesn't feel it's necessary, nor do I. However, he feels the builder should epoxy the whole garage after re-pouring the concrete so that the areas match. As he stated, it's just the right thing to do.
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Old 09-11-2007, 11:55 AM   #40
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Concrete problem in garage?


No epoxy coating is going to adhere to a wet area.
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Old 09-11-2007, 11:56 AM   #41
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Concrete problem in garage?


My thoughts exactly.
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Old 09-11-2007, 09:05 PM   #42
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Concrete problem in garage?


first...concrete cracks... if you cant drop a nickel into it dont worry.

second...have you ever walked around in concrete with rubber boots on tripping over remesh? A couple small holes are likely.

I dont know how wet it is where you are but the concrete may still be curing too. Can take like a year under some circumstances. After it is cured (water evaporated and hardnenned)... it will act like a spong and draw the moisture in wherever it can. On a humid day if you leave the overhead door open all day, half of your floor can look like that just from sucking humidity out of the air!
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Old 09-11-2007, 10:25 PM   #43
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Concrete problem in garage?


How long should the concrete cure before an epoxy coating is applied?
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Old 09-12-2007, 06:08 AM   #44
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at least 30 days, but more if it's wet, rainy or humid IMO. There's a water spot test that some manufacturers will specify. You'd have to talk to the specific manufacturer. I would also suggest 100% solids epoxy, you get more coating for your money and no volatiles evaporate out of it.
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Old 09-12-2007, 06:59 AM   #45
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Concrete problem in garage?


As a consumer I would not settle for water puddling in my garage. It will affect it's use (I can't have water if I am using for building furniture, or a small office), and worry about mould. I also worry about resale as this will definatly be an issue.

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