How do I level out my patio?
There are two different levels of concrete out my back door. One used to be for a room that has since been torn down the other was a patio area. There is anywhere from a 1/2 inch to 1 inch difference. I would like it all one level but have been told if I pour concrete it will need to be deeper than the 1inch to make it strong. I also want to make sure there is a slope so the water does not pool up at the back door. There is about a 2 1/2 to 3 inch drop from the back door to the concrete slab.
Thank you
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Look into whether you could use a self-leveling type of concrete, which is thinner and doesn't have aggregate in it like regular concrete does. It is designed to level itself out in a given area - you would need to put up a form to halt the flow of the leveler where the concrete area ends. It would be poured only up to the level of the higher concrete patio to even out the two heights.
Yes, there’s many choices of leveling concrete products.
Prep work will be essential for it to bind to the existing concrete.
In my case I’m going to scrape off the patio paint first and then I’m going to grind some expansion joints into the slab work, so that they have places to crack on purpose.
I will also have to muriatic acid wash the problem areas, to get it to bind and not spall.
Be fore you do anything on top, call a concrete leveling co. You may be surprised on how affordable it is and with a warrenty.
Yep. Use self leveling concrete. It's polymer latex modified to stick to old concrete. New concrete will not grip to old.
https://www.homedepot.com/p/Custom-Building-Products-LevelQuik-RS-50-lb-Self-Leveling-Underlayment-LQ50/100192482
https://www.lowes.com/pd/Sakrete-Fastset-Self-Leveling-Resurfacer-50-lb-Fast-Setting-Concrete-Mix/1000250711
https://www.youtube.com/watch?v=_LXsuFVvbLQ