Proper scraper and take as much as possible off https://www.screwfix.com/p/heavy-du...VB7LtCh3IogoREAQYASABEgKgOfD_BwE&gclsrc=aw.ds Then something like this for the remainder https://www.screwfix.com/p/no-nonsense-sealant-remover-100ml/88987
brass, wire brush, or drill attachment, I've used, former for large surface evostik type glue removal, cleaning the debris off of tool against a piece of wood periodically
You do tend to polish up the brickwork like that. Any way you do it it won't look like it's never been there.
Are you asking about the black stuff or the white stuff or both? The black stuff looks like tar so should come off with petrol.
This would be my first port of call, if it dont get it off it will loosen it, then go at it with a scraper. I had to do the same when I pulled the old lean-to down off the back of the house.
Thanks for your replies, I will jet wash both and scrap and see what happens. Weather is poor at the moment so I'll get it done in the next few days and show you my progress. I understand it won't look the same but anything is better than it looks!
First attempt with a bolster chisel and hammer before it started raining. Looks good and just brushing up I think?
I've got something similar on some of my rendered wall at the rear of the house where someone had a crap conservatory up. Albeit the stuff on my house is probably about ten years old so it simply comes off in chunks by hand cos its perished that much. Should really get round to peeling it all off! Looks like yours is coming away not too bad though.
Use a non-metallic scraper. Get a piece of old plastic or perspex, sharpen an edge on it and it should cut the mastic without damaging or making any marks on the bricks.
