Hello, I know this is a few years old now. But I wanted to say thank you for these instructions! We are renovating an apartment in Vieux Nice (our building is around 500 years old, give or take!). I’ve been wondering how to install a header plate in stone walls and this was perfect.
I do have some questions if you don’t mind answering: did you drill the 20 mm holes with a masonry drill bit? Or with a diamond core drill bit? If you did use a diamond core drill bit, did you do a wet or a dry drill?
How many drill bits did you go through?
And where did you find a drill bit long enough? I’ve found some 20 mm diamond core bits that are almost 40 cm but haven’t found a 20 mm masonry bit that long.
Thanks!