Remove mortar from slate tiles??

[Andehh]

Tiler didn't listen to builder about sealing tiles before laying them, tiler figured he'd remove grout afterwards. 

 

We now have a large slate wall with extensive dried mortar. Tiler has already spent a day with a pressure washer and diluted brick acid, and it's not looking any better in my eyes. 

 

Any thoughts on what I could suggest to him??

 

[Big Jimbo]

Is there a DPM somewhere in that wall ? Don't blame you for being upset. That looks pants. I have no idea how you might bring that to a better standard.

[Andehh]

Yeah, full DPM and there is a 1.5m Canopy above it, also tiled upstands will go below the tiles. 

 

Just the colour of the tiles!

[markc]

I doubt you will get it looking acceptable, I ‘recovered’ a slate floor by scraping (with an old wide chisel) the top of the slate away. On those little tiles it would take a long time

[nod]

Use a paint brush to apply neat brick acid Was off after five minutes Repeat