This is a new one for me, 1960’s era home, with a cement like siding. It looks like a paneled siding, it appears to be attached to the house, not solid concrete. It appears durable, customer was wondering what it was (and so am I)
House was added on to, so it is on the original part of the house, not the garage.
Mike, my brother bought a place a few years back that had walls similar. They were precast concrete about 2 1/2 to 3" thick. The panels were about 24" wide and 8’ + tall stood on end around the entire perimeter of the home. The inside and outside were furred out and siding and drywall or paneling was installed.
It was used in a limited fashion back in the 50’s and 60’s in various parts of the country according to Gerry Beaumont when I posted pictures back when.
In the lower density ranges, lightweight concrete does not develop the compressive strength of plain concrete.
It’s a light weight concrete. I have only seen this on industrial and several homes.
The concrete was used in construing roofing decks on commercial application in the 50,s and 60’s.
First came across this in 1980.
With the exposed pebbles, it strikes me as a formed product. I get the idea that this is was laid flat in a form and stood up after it dried. It doesn’t strike me as concrete coated panel board.