Help with render

[ferkinuseless]

Hi all,

I have been rendering my garden walls (first time actually doing it) and I have only got the scratch coat on at the moment however it seems very weak and powdery.

I used plasticiser with a 5(sharp sand):1cement mix any ideas what went wrong.

Can I recover this with the top coat?

Thanks in advance

 

[roy c]

How did you measure your mix out? And how much Plasticiser did you use? And how did you mix it?

 

[ferkinuseless]

The quanities were all measured using buckets and it was allowed to mix for a fair time in a mixer. I believe the problem was too much plasticiser/waterproofer. This additive is different to ones I have used before when I have mixed up for other people and I believe I have used to much.

I have removed the soft render and I am going to start again with the correct amount of plasticiser

Thanks for the response