I have 2-3mm crack in slab concrete in 2 floor house construction. water can penetrate through that crack Slab dimension is 4m x 6m and 12mm thick slab is there any risk in the future Please give me your recommendations

Thanks

t looks like "all the work" is done by the reinforcement and concrete is there just as a finish It's more like a tent So I'd be very careful with the crack Once the reinforcement is damaged by corosion the slab is down
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thank you, ill contact you today
mark

no problem