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My fellow worker enlarged a 3/4" hole to fit 1" EMT by driving a piece of scrap 1" conduit through the 6" wall with his 16 ounce hammer.

We have a construction block here which goes by the trade-name of Thermalite. It's a very lightweight and low density block which is commonly used for the inside half of a cavity wall. You could pretty much just put your conduit up to it with no pilot hole and bash it through like that.

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I'd give my eye teeth for a good old section of stud with sheetrock!

I like wood frame construction too, as it makes evertything so much easier.

If granite it tough to get through, how about those crumbling old Victorian redbrick houses where the wall only has to see you coming at it with a drill bit, says "I surrender," and falls into a heap of dust at your feet?

I've fitted boxes, thought they were secure, only to have a whole section of brick fall out the moment I turn away. [Linked Image]

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In Europe there's a running joke saying US houses are cardboard boxes...

Fair's fair I suppose. Americans could make the same criticism of European cars..... [Linked Image]