My house has a concrete patio (about 16x16 though its 5-sided) which is not sloped properly for drainage. In some sections it seems basically level, in others (near the doorway of course) it actually pools water.
The worst area I estimate slopes about 1/8" per foot the wrong way.
The concrete itself is in excellent condition. It doesn't show any signs of settling, I think it was just not poured with correct slope in the first place (*).
I am planning to deck this over with sleepers laid over the concrete. S the concrete appearance is not very important.
Ideas how to deal with the slope:
(CAN'T DO) Pour some leveling compound - height by the doorway is already very tight, can't afford to lose any of it
(POSSIBLE) Grind 8-12" wide channels to achieve at least 1/8" per 1' slope, from the low spots to the yard. Rent a grinder like the example pasted below. Concern: might have to grind off a lot of material, maybe this is not practical.
(POSSIBLE) Cut channels with a diamond demo-type saw with correct slope. Cut as many as needed. Concern: thin channels may clog with time.
Are either #s 2 or 3 feasible? Am I missing anything important, or is there another option I'm ignorant of?
(*) I think this was bad planning, not a construction error. This area was once covered and not exposed to much water.