Use any 2x4 that overlaps the forms by at least 6 in but make sure it s straight photo 1.
Screeding concrete against a wall.
Work your way downhill if applicable drawing excess concrete into low spots and holes.
Screeding should begin as soon as possible after the concrete is poured.
The distance from the bottom edge of the 2 by 6 or 8 to the bottom of the u notch will be 2.
Screeding is the art of skimming or striking off the surface of the concrete after rough raking it.
Straightedges are used to strikeoff or screed the concrete.
Screeding concrete is one of the first steps in placing and finishing concrete.
Screeding levels the concrete with the top of the forms and begins the process of forcing the larger aggregate below the surface.
This process removes excess concrete and brings the top surface of the concrete to proper grade.
Screeding when done properly will leave you with a good even flat surface free of humps bumps holes and low spots.
Your goal is to level out marks and fill small holes left by screeding.
Now cut a u shaped notch on the end of a 2 x 6 or 2 x 8 to accept the 2 x 2.
It must be completed before excess bleedwater appears on the surface.
When you re hand screeding use a sawing motion across the guides as you creep forward along the guides.
This step in the finishing operation is the most important in producing a true plane surface and takes place immediately after the spreading of the concrete.