Recovering From Rained-on Concrete? - Concrete & Paving - Contractor Talk

Recovering From Rained-on Concrete?

Thread Tools Search this Thread Display Modes
Old 08-31-2008, 08:57 PM   #1
GregWCIL's Avatar
Join Date: Apr 2008
Posts: 13
Rewards Points: 10

Recovering From Rained-on Concrete?

I'm the GC on my own house project. Last week my subcontractor poured the basement floor. All went perfect-proper slump, great crew, reinforcing mesh at the right height, pex tubing for radiant stayed put. Cool, cloudy morning so it wasn't drying out too fast.

Only one snag--It RAINED A HARD 1/2 INCH RIGHT AFTER THE FIRST TROWELING. (No one's fault, nearest rain was 100 miles away when we started, going away from us--it just popped up.)

It washed away the surface cement, leaving sand and water. I helped them squeegee off the water and they somewhat recovered the surface with much troweling and sprinkling on dry cement and silica sand mix. Most of the floor looks good at this point. (I am curing it under water to keep it as strong as possible.) I am confident the over-all strength of the slab is fine. However, around the edges where the power trowels couldn't reach the surface flakes off.

How do I recover from this? Should I have the concrete guy grind off the edges and put some coating on? Is there a specialty contractor/product I should use? I have already given up on the idea of acid staining those floors. (We will probably just tile them now.)

Do I have to worry about the main surface flaking even though they got it troweled good? (Final troweling was almost 5 hours after initial placement of the concrete. 4 in. slump raised to 6 in. with plasticizer.)

Thanks for the help,
GregWCIL is offline  

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!




Old 08-31-2008, 09:08 PM   #2
nap's Avatar
Trade: sparky
Join Date: Jan 2008
Location: SW Michigan
Posts: 591
Rewards Points: 500

Re: Recovering From Rained-on Concrete?

who made the call to make the pour?

If it was the sub, then he needs to worry about all of the problems you asked about and take care of them.

Not inferring you should not be involved and concerned with the final product but if he made the call to pour and failed to protect the pour, it is his repsonsibility to repair whatever is needed.

as to the actual questions; I have no fricken idea. I don;t do concrete.

Now, if you have some questions about the wiring, let 'em fly.


nap is offline  
Old 08-31-2008, 10:00 PM   #3
I'm a Mac
Chris Johnson's Avatar
Trade: ICF Construction
Join Date: Apr 2007
Location: Hog Town
Posts: 5,487
Rewards Points: 4,254

Re: Recovering From Rained-on Concrete?

Since you are planning on tiling the floor I personally wouldn't get to excited about the edges, make sure all the flaking is finished or remove any loose areas prior to tiling. The flaking is the surface/cosmetic only, not structural.
Chris Johnson is offline  
Sponsored Links
Old 08-31-2008, 10:11 PM   #4
Kgmz's Avatar
Trade: General, Electrical, and Plumbing Contractor
Join Date: Feb 2007
Location: Portland, OR & Eatonville, WA
Posts: 1,300
Rewards Points: 500

Re: Recovering From Rained-on Concrete?

Have you thought about having a polished concrete floor.

Don't know how far down your damage is, but if not too deep could be ground down.

We will be starting a commercial building that will have polished concrete floors, and I really like the looks of polished concrete floors. One of the new Wal Marts built here recently has a concrete polished floor and it looks great.
Kgmz is offline  
Old 09-01-2008, 07:11 AM   #5
GregWCIL's Avatar
Join Date: Apr 2008
Posts: 13
Rewards Points: 10

Re: Recovering From Rained-on Concrete?


Thanks for the reply. I just wondered if the edges needed grinding to make sure all the flaking is taken off.

Also, my concrete staining guy just called. He thinks we might still be able to use stain but we'd have to put a thin layer of special cement on first. (If this gets too involved, it may end up cheapest simply to tile it.)


I wonder if the grinder can make the flaking area the same as the other? Like I said above, it may be cheaper just to tile it.

Thanks for the replies,
GregWCIL is offline  
Old 09-01-2008, 07:24 AM   #6
genecarp's Avatar
Trade: LI,NY designer, new homes, renovation work, concre
Join Date: Mar 2008
Location: Long Island, NY
Posts: 5,425
Rewards Points: 2,000

Re: Recovering From Rained-on Concrete?

its called a micro topping, or coating, listen to your staining guy, it does not sound like a big problem.
genecarp is offline  
Old 09-09-2008, 10:35 PM   #7
Hoven's Avatar
Trade: Decorative concrete / Comercial /residential flatwork
Join Date: Aug 2008
Location: North East coastal region
Posts: 64
Rewards Points: 75

Re: Recovering From Rained-on Concrete?

I agree with Gene, Microtop. There is a rough and fine grade of the product available, usually through a decorative concrete supply. you wont find it at home depot or Lowes.
Hoven is offline  
Old 12-08-2008, 09:19 AM   #8
Join Date: Nov 2008
Posts: 3
Rewards Points: 10

Re: Recovering From Rained-on Concrete?

You dont want to Acid stain a floor if its not flawless,The acid stain is a beatiful thing but its transparent.And what ever you see on the floor now you will still see.I would clean it very good (around the edges)cause if its going to flake you can pop it up pretty easy.Then either epoxy it or Cover it.If your finishers recovered it that soon the floor should be find they took the right procedures in fininshing it.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
taking a crack at my own concrete work J-Peffer Masonry 9 10-25-2010 05:16 PM
structural concrete... mdshunk Masonry 3 03-05-2009 03:42 PM
Advice - concrete Pool Deck coping ejleonard Masonry 4 06-17-2008 04:18 PM
HELP.....Rained Damaged Concrete! 9452 Construction 2 12-27-2006 09:05 AM

Join Now... It's Fast and FREE!

I am a professional contractor
I am a DIY Homeowner
Drywall Talk is for

At we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?