Drill a 4″ hole in pour concrete foundation by using 1″ drill bit
I tried to search but it seems I could not find an answer to this. My question is:
1. Could I use a 1″ or 1.5″ drill bit to drill a 4″ hole using SDS max into a poured concrete foundation by drilling them (3 or 4 of smaller drill holes) close to each other? This would be cheaper to buy a 4″ hole saw bit.
I know the answer would be yes and the hole won’t look pretty but it should not matter. My concern is about the concrete structural integrity.