If you have a concrete floor that slopes and you want to level it; the easiest way is to use a mortar cart with a large mixer. Mix the mortar to the consistency of pancake batter in the mixer and then pour it onto one end of the floor. The slope will level out as you pour.
Once your level line is reached, start at one end and slowly spread the mortar mixture across your floor with a trowel or broom. Be sure to pull any lumps back into the wet mud before they dry. As you work, try to keep an even thickness of about 1/8 inch (3mm). Continue this process until you reach desired width and then clean up your tools.
When your floor is finished, you will have a smooth and level floor. Keep in mind that some people like a sloped floor while others don’t. If you do not have a concrete brushing tool, you can even use a string for sweeping.
Once your job is done, always wash the tools and equipment before leaving them for others to use, such as concrete mixers, shovels etc.
Its best to read as much as you can on how to do things like this before starting anything, so that if you have questions its much easier to answer them later on.
Making a plan
Planning any work is always essential. If you are going to level your sloping floor the first thing you will want to do is draw up an idea of what you want it to look like and the measurements of the floor and any outside features. Have a look at the inside and if there are any cupboards or stairs draw them in as well. If you do not have a measuring tape its better to take the tape with you than make another plan, because once you start work on your floor, it will be very difficult to measure anything up.
Preparing for your day
Before you start work on your sloping concrete floor, choose a day when it is dry outside so that any water does not stand on your floor. You will also want to make sure that you have read as much as you can on how to level concrete floors, so that if you have any problems in the future, it will be easy for you to figure out how to fix them.
When you are ready to start on your leveling project, the first thing you will need is a trowel or broom for spreading the mortar and a concrete slab edging tool. This tool is used especially for scraping out your floor. You will also need some safety gear such as gloves, goggles and ear protectors because of the noise from the power tools and their flying dust.
Making it safe and clean
Before you start leveling your floor, make sure that you have covered all of the surfaces that need to be protected such as cabinets and walls. You will also want to remove any furniture that would get in the way of the work. This includes moving bookcases and refrigerator units out of the room, so that you do not damage them.
You will also want to cover your ceiling with plastic sheeting or tarps as well.
Mark where the uneven areas are
You can use a level bar for this or set up a level line using two pieces of string with some concrete cording in between them. This will allow you to draw level lines on your floor. If you have to do this, make sure that you mark the points where your levels come together on the floor so that it will be easier for you to find them later.
Mixing the mortar and starting work
First fill your mixer with water and attach it to a power tool such as a mortar mixer or wet concrete mixer and mix it with cement until it is completely combined. You will know when its ready when the consistency is like pancake batter.
You will want to use the trowel or broom to spread the mortar gently across the floor. Work in small sections so that you have time to clean up any tools or materials. Work slowly and in sections, so that if you get stuck or hit an area where there is more mortar than you can work with, you can move on without having to start over with a fresh application.
Using a hand held concrete edger may make this process easier if your floor is large. You can also level large areas like patios with power edgers, but be very careful when using such tools on floors because they can cause much damage if they are not used correctly.
Grinding down the high points which are uneven
Once your floor is leveled, you may still have some high points or bumps in the mortar. You can grind these down with a concrete grinder with a narrow diamond blade for finishing. This will also help if you have any cracks in the mortar from poor workmanship.
If your floor is not completely level but is good enough for your needs, then you can stop here. However, if you want your floor to be perfect and smooth, then continue reading because there are other steps that will need to be followed in order to finish leveling the surface.