evening guys been to see a job tonight render all over the floor .the house is only ten year old but its in a bad state its a smooth render 2 coat top coat has been done in white sand cement ,trouble is you can scratch through to 1st coat with your finger nails its very weak ,then when i went further took some of the 1st coat away it and the block work behind was soaking the whole house is like this do we think its just lack of waterproofer and to weak a mix or am i missing somthing any help /advice appreciated thanks paul