If it's stone, it might be relatively soft compared to cement. Scrapers can gouge out bits if you're not careful, and anything powered even more so.
It is (in my single will experience) slow boring work.
I don't mind slow boring. I'm currently having some buyers regret with the non-diy people I got in to do the repointing after deciding it was too big a job for me. Ugh.
@NotThamesWater started
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If it's stone, it might be relatively soft compared to cement. Scrapers can gouge out bits if you're not careful, and anything powered even more so.
It is (in my single will experience) slow boring work.