@african coloner, Added water reduces the strength of the concrete. It increase the w/c (water/cement raio) which should be maintained at an optimum. How much did it rain?, when you say "washed" does it imply it rained heavily and eroded the concrete? if the rain was not much, you can let the concrete cure for 7 days and do a non destructive strength test. The 7 day strength will help an engineer determine if your slab, with the reduced strength, can take its intended loads. If the strength is too low, you unfortunately gota remove the slab and start afresh.

@african coloner. @mosbys advice is proper. Your structural engineer will have to carry out strength tests to ensure strength has not been compromised as per initial structural design.

@Architect I have a plot in Utawala (40x80). Actual dimensions are 10.8m by 26m. I plan to build rental units but in phases since i don't have enough cash. So for 2.5M, how many simple two bedrooms houses can i build on such a land. Is one bedroom house better than two on this one. regards

How do you go about putting a house fire place in an old bungalow house with a big lounge that was originally built without?

Halo guys. am doing mixed units of 4 one bedroomed units,2 2bedroom and 2 bedsittesr on an Eighth..upon copmletion, the total units upto 3rd floor shall be 24. currently at first slab level/shutter..how do i post pics in WaZUA? i intend to first completly finish ground floor. The project is in nakuru whitehouse estate..