Many thousands of these (perhaps 17k) were built in Dublin, Ireland from mid 1930s-40s. Poured/shuttered concrete and rebar, concrete floor at ground level, int

Many thousands of these (perhaps 17k) were built in Dublin, Ireland from mid 1930s-40s. Poured/shuttered concrete and rebar, concrete floor at ground level, internal walls are block work. I live in one -- recently had insulated externally (100mm EWI) which has drastically improved its thermal properties. About 50% of the floor area downstairs is the original bitumen sealed, uninsulated concrete. No ducts, you want extra wires or pipes you make a hole in 250mm concrete :D https://digital.ucd.ie/view/ucdlib:47011 https://digital.ucd.ie/view/ucdlib:47011 https://digital.ucd.ie/index.php?q=crumlin+area+6 https://digital.ucd.ie/index.php?q=crumlin+area+6 https://www.irishtimes.com/culture/heritage/remembering-herbert-simms-the-man-who-rebuilt-dublin-1.3447370 https://www.irishtimes.com/culture/heritage/remembering-herb... Just to add: there were many identically dimensioned houses built in parallel, of brown or yellow brick. These were at junctions, roundabouts and along major roads, but the majority are concrete. I've seen it humorously referred to as "Simms City".