Why can you pour concrete over concrete?
clyde6n
16 years ago
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clyde6n
16 years agoRelated Discussions
Resurface concrete patio - over existing concrete or no?
Comments (4)Money is Money, Change is Change, But what sticks to the Bee is what makes the Honey. In other words they can make more doing an over lay. What ever fault a slab has will always be there. If it moved,cracked,split the same thing will happen to creet placed over it. X 100 going down hill X another 100 with wood inlays. So say there is nothing wrong with the existing creet,Nothing at all. It stll moves with the seasons like everything else solid like that exposed to the weather/sun. To get a fignting chance the Contractor would have to>>> Drill in 1/2 '' rebar into existing, lay a level of sand over the slab,Use a footing mix and tamp the dickens out of, hope for the best and get paid right after the pour. Or just form up and pour the thing and still get paid the second it done. J....See MoreMy project: pouring concrete countertops Over existing tile
Comments (34)No I did not remove the tile except around the sink to remove the old sink. I built forms from wood but the wood on the front was removed after the concrete set for a couple hours and the wood underneath removed the next day. Here is a photo of the concrete in the pass through window after I removed the front mold part. I left the wood underneath to support the overhang until the concrete reached near full strength the next day. You can see some leakage on the right I had to chisel away later. If you do this, I highly recommend caulking all the molds - I only did some areas because I thought I had screwed the soft wood tight enough but I was wrong, the resulting leaks caused all my problem areas. I should have caulked all the seams on the wood molds and I would not have had the problem. The counters still look great after months of use, BTW! here are some pics of the molds: Big mess caused by leak- made painting the cabinets later a lot more work to sand off all that gunk. The leaks also created air gaps in the mold area I couldn't see until the concrete was set, I later had to hand trowel a thick mixture on those areas to repair it. It will never look as smooth as the mold-formed areas. My plan for next spring is to tile the backsplash if budget allows - the beadboard wallpaper is serving its purpose for now but tile will look nicer....See MoreCan you lighten concrete before it's poured?
Comments (19)I would trust them to match as best as possible. In my experience, the old concrete will have gotten lighter from the sun (ours was a colored concrete---yours might be too). So let them pour it and have it cure and then see what you have. You might have to get creative with diy staining the old to make it match better. Or you might not notice it at all. Fingers crossed on that....See MoreCan concrete be poured over old tiles and marmoleum in a basement?
Comments (11)The cost of a PROPERLY laid micro-topping that is then polished/ground to a high-level finish will depend on whether or not the current slab has an existing/functional moisture barrier. Some of the SUPER HIGH END microtoppings that are DESIGNED to be polished (no epoxy coating) to a super-dense finish, are very expensive. They can take close to 2 weeks to grind down the existing slab, then put down a moisture barrier (spray-in-place x 2 coats), then primed, then the micro-topping is put in and then all the grinding to get a closed-pore floor that is almost impervious to stains and etching (almost...but not quite). And a professional concrete flooring specialist isn't cheap. The level of "polish" will determine your costs. For a DIY level finish = $5/sf (which stains and etches and takes ++maintenance and ++ polish/wax). A medium grade finish (professional level) WITHOUT the microtopping = $7-$10/sf. A high-end (almost bullet proof finish) which includes the microtopping = $15 - $20/sf. And then the actual costs will depend on your location and the ease of access to all of the products/professionals you need. If you are rural without access to a large city, then the cost is going to go up. If you are in an urban location with LOW wages, then you are set for the lower range that I've listed. If you are in an EXPENSIVE urban location (think NYC) then you are in for the HIGHEST range I've listed. But until you decide which type of FINISH you are after, we can't help much more than that....See Moredavidandkasie
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