Help!!!! Scratch coat/Bonding

[MrBeeee]

Hi all, i have just started replastering my flat,i decided to use a render base coat as the old stocks are a little ropy and i wanted to strengthen the walls up as much as possible, my question is are there any reasons why, after i have raked out the joints well on the internal walls and applied the scratch coat that i can't use a bonding coat over the scratch followed by the finnish. I know one would usually use a render float coat over the scratch then finnish but bonding is going to be lighter on the old tennis elbow . Would REALLY appreciate some professional advice! Many thanks. B

 

[roughcaster]

A Bonding float coat onto a cement scratch coat is not a problem. Use a waterproofer in the s/coat mortar though.

Roughcaster.

 

[roughcaster]

Waterproofer in the scratch coat will make the job of floating the wall with bonding,, or Hardwall, much easier. It will also more or less eliminate the chances of efflorescence/salts from coming through the plaster from the old brickwork. You might find Hardwall an easier undercoat to work with in the long run.

Roughcaster.

 

[MrBeeee]

Thank you very much Roughcaster-i'll be on the case first thing tomorrow.