Can "Bonding" be used for Rendering?

[Darius1069]

Hi everyone,

I wonder if someone can help me please.

The external wall to back of my house suffers from minor damp and I want to apply rendering to stop the damp.
Now my builder has told me he is going to use " Bonding" instead of "Sand and Cement". Is that the right thing to do??

I am worried it won’t be as hard and it won’t be waterproof.

Also is it wise to add waterproof P.V.A to the mix?

I would appreciate anyone's help.

Cheers
D

 

[roy c]

Hi everyone,

I wonder if someone can help me please.

The external wall to back of my house suffers from minor damp and I want to apply rendering to stop the damp.
Now my builder has told me he is going to use " Bonding" instead of "Sand and Cement". Is that the right thing to do??

I am worried it won’t be as hard and it won’t be waterproof.

Also is it wise to add waterproof P.V.A to the mix?

I would appreciate anyone's help.

Cheers
D

No !!!!!!! Bonding is for inside "dry" work..Sack your builder....

 

[plasteringpaul]

Roy is correct. Sack your builder. Hes a clueless chancer.

Do you actually know where the damp is coming from cos that would be a good starting point.

 

[Alastairreid]

If by bonding he means gypsum plaster then as roy says find yourself someone who at least knows the basics.

 

[cotswoldbuilders]

Im pretty sure the builder isnt so thick as to suggest using Carlite bonding as a render.
Are you sure he doesnt mean, SBR bonding prior to sand/cement render.

 

[Micilin]

Im pretty sure the builder isnt so thick as to suggest using Carlite bonding as a render.
Are you sure he doesnt mean, SBR bonding prior to sand/cement render.

I hope you are right, but the OP seems clear as he says 'instead of'. It may be an external wall as opposed to an outside wall, but I would not be surprised if it is bonding plaster , I'm sure we've seen it before!

 

[Alastairreid]

Just re-read this post and think he means the inside of an external wall.

If that is the case you should use render with a waterproofer.

 

[limerockconstruction]

surely bonding near damp is bad - internally or externally - its just not gonna work!

As the chaps say - S&C with waterproofer all the way.