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Slab Construction
This archived discussion is "read only".
» pascarj - Re: Screeding Hi Zimfam...The first thing you need to do is to mark either the retaining wall or the house with a line that is about a quarter inch higher for every 10 feet of slab than the form boards. This will allow rain water and snow melt (if any) to flow away from your house. Next, have a helper hold one end of a string on the line on the wall and secure the other end to the top edge of the form board. Then take spikes made out of 3/8 inch reinforcing bar and drive them into the ground, along the string, until the spikes are even with the string. These spikes are called grade stakes and they allow you to screed the surface level. You will need to be extra careful while you screed between the spikes, since you will not have a constant edge to work with. Once the concrete is level, you will need to drive the spikes down below the surface of the concrete. You will need to walk across the area you just leveled to do this. make sure your return steps are in the same footprints and use a float to smooth out the footprints as you go. This type of slab takes a lot of extra work to get it right. Unless you have many helpers, you would be better off pouring the slab in sections. By pouring sections next to the house and retaining wall, you can use the section themselves as a screed surface. -- posted by pascarj
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