Rendering over existing external walss

Most plasters hate rendering over Bradstone,as you cannot be 100% certain of it bonding to the stonework.

 

So much work grinding back the blocks, & raking out joints, still 100% adhesion is a certianity, how big is the area your thinking of rendering.
Rendering mesh, has to be a Stainless Steel Wire Mesh over the Bradstone blocks might be an option, but it ain't going to be cheap to do the job with all the prep.

Better to forget the idea I think.

 

You could try scudding the wall a couple of times before the scratch coat.

 

Cheaper to rebuild arches in block & render.

 

It don't work.

Even using a tyrolean machine.

 

Of course scudding works,have seen a few very good Plasterers doing it.
On bradstone walls I do not know,but worth a try.

 

I know it works on blockwork, but not on Bradstone, I speak from experience on that.
Ended up taking the bradstone walls down & rebuilding them in block, then rendered, was the lesser of two evils.

 

Even bigger job grinding back the bradstone, attaching mesh & rendering.

Can't think of any other method, than the two I've mentioned.

 

Something at the back of my mind tells me that altering the external appearance/character of a house to that extent requires planning permission. Can't remember where I heard that or whether it's still the case. Someone will know for definite though if only the local planning department.

 

Would K-Rend be any good for this. ??

 

It would be the pefect finish,but you still need a mesh on the wall for the K Rend to adhered to.