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RichC 03-10-2014 02:10 PM

Improving 'floated' finish on concrete countertop
 
I poured my concrete countertop yesterday with the help of a Brickie friend. It's just white sand, granite sand and white cement. The finish is floated, not troweled so slightly rough. I figured this would be ok as I'd easily polish off the rough surface. I'm looking now and seeing some imperfections and wondering if I should make up a mix and trowel it on to get a smoother finish. There's a few small 'very minor' hollows I'd like to fill. I'm wondering should I fill the hollows in 2 weeks when I start to polish or should I do it sooner?
Also do I need to wait 2 weeks to start polishing?
Thanks

Rich

stonecutter 03-10-2014 03:12 PM

Re: Improving 'floated' finish on concrete countertop
 
Nope, filling low spots will not work. Live with it or do it over.

You should wait 7 - 10 days before you polish.

RichC 03-10-2014 03:20 PM

Re: Improving 'floated' finish on concrete countertop
 
Thanks stonecutter, the low spots are very minimal so I'm not worried. Can't wait to start polishing and see how it turns out

ATK406 03-10-2014 03:21 PM

Re: Improving 'floated' finish on concrete countertop
 
Quote:

There's a few small 'very minor' hollows I'd like to fill.
When you say "hollows" do you mean variations in the flatness of the surface or pin holes? I think Stonecutter is assuming the former as pinholes can be filled prior to polishing the surface (but you probably already knew that).

AT

Oops, looks like you already responded to Stonecutter's post.

RichC 03-10-2014 03:31 PM

Re: Improving 'floated' finish on concrete countertop
 
Atk, yes its hollows and only 1 or 2 but very minimal. Nothing I can't live with

stonecutter 03-10-2014 03:41 PM

Re: Improving 'floated' finish on concrete countertop
 
You could feather them out before you polish.

ATK, I wasn't referring to pin holes.

RichC 03-10-2014 03:45 PM

Re: Improving 'floated' finish on concrete countertop
 
What do you mean by feather them out?

stonecutter 03-10-2014 04:26 PM

Re: Improving 'floated' finish on concrete countertop
 
Grind the surface around the hollow...blend it in.

RichC 03-19-2014 11:41 AM

Re: Improving 'floated' finish on concrete countertop
 
I'm gutted!! Going to rip out the countertop and do it again. I started polishing last night just to see a sample. I picked a small patch and just did the 50grit. I was amazed at how good the finish can get and I can see how it could be truly amazing BUT the floated finish on my countertop has too many imperfections like pockmarks and small grooves. I'm going to do it again and get a good trowelled finish to start on. The mix I used, equal parts, white sand, granite sand, white cement looks great. I love the finish. Its just going to annoy me looking at it for years if I dont do it right so I'll be cutting it out over the next week or so and will start again. I know if I leave it small bits of dirt etc will get into those grooves and hollows and I'll never be able to clean them out.....Big job but the decisions been made!!

stonecutter 03-19-2014 01:08 PM

Re: Improving 'floated' finish on concrete countertop
 
If you cast it upside down it will be pretty close to perfect.


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