Tanking a cellar

[doddy]

Is the normal render mixes suitable for tanking cellars ie: 4/1 sharp sand,cement.Do I need to add pva to the mix to make it water resistant,please help

[FredFlintstone]

You need a tanking kit. You paint the stuff on the wall and THEN replaster. If it's a damp proof course you're thinking of then you inject the chemical into the mortar course and then replaster, adding rendamix to the sand and cement mix.

Regards

Fred

[doddy]

The front wall in the cellar was done 'professionally'?(by a local posse) before we bought the hotel, the root of the problem was a fall pipe that was left as a soak away in front of the wall and they have not put a full concrete slab down, only concreted upto the wall which is built on a clay bed so it is holding water and causing rising damp(miss jones).Once I get the slab under the wall it should dry out, would a normal render then be suitable ?
Cheers

doddy