priming a surface for bonding

[Spreadley]

Im new to plastering and need some advice. I have done a job bonding out and skimming a chimney breast, the original brickwork has been varnished to prepare the surface for bonding plaster i applied several coat of fairly strong PVA-water solution.

Is this an adiquate way to prime the surface or will i get bond failure?

 

[flat boy skim]

i would eml it or scabble it back to the bare brick

 

[flat boy skim]

i would eml it or scabble it back to the bare brick

or wba,thistle bond it!

 

[Spreadley]

Thats what i thought, hopefully it stays on the wall or im in for a long unpleasent Saturday:-(

 

[Jace]

is it a working chimney breast??

 

[CeeVee]

I would have thought if the varnish had a strong bond then you could just use bonding straight on it. Its designed for low/no suction.
How come it wasn't just browned or hardwalled straight onto the medium/high suction brickwork?

 

[Fatarm]

Thats what i thought, hopefully it stays on the wall or im in for a long unpleasent Saturday:-(

Well saturdays nearly done mate, is the guarantee good? Was it for a customer or yourself??:RpS_sneaky:

 

[keithuk]

I would only use s/c on an old chimney with a water proofer added ,any damp in the stack will come through bonding ,but that me each to there own